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The search for plants with a high capacity to tolerate and accumulate metals is an important issue in phytoremediation. In this sense, this study was conducted in the halophyte Atriplex vulgatissima to evaluate the effects of different concentrations of lead (Pb, 50 and 100 µM) or zinc (Zn, 100 and 200 µM) on morphological, physiological, and biochemical parameters as well as the accumulation patterns of this species. The results indicated that while essential metal Zn showed high translocation from roots to shoots (TF > 1), non-essential Pb was mainly accumulated in the roots (BCF>1). Regarding shape, both metals induced slenderness of the blade, but only Zn treatment reduced leaf size. No difference in biomass production and photosynthetic parameters was found between Pb and Zn treatments. Pb treatments did not show significant differences between treatments regarding water content (WC), pigment concentration, and the activity of superoxide dismutase (SOD) and guaiacol peroxidase (GPx), but did result in a decrease in catalase activity at 100 µM Pb. On the other hand, 200 µM Zn leads to a clear reduction in WC and pigment concentrations, along with an increase in SOD and GPx activities. In addition, ascorbate peroxidase (APx) activity showed a hormesis effect at 50 µM Pb and 100 µM Zn. Malondialdehyde increased with both Pb and Zn treatments. The integrated biological index (IBRv2) indicated that 200 µM Zn was the most affected treatment (IBRv2 = 19.02) and that under the same concentrations of metals (100 µM Pb or Zn), Pb treatments presented major stress (IBRv2 = 11.55). A. vulgatissima is a metallophyte with the potential for Pb phytostabilization and Zn phytoextraction, as well as a bioindicator of these metals. Its high biomass and deep roots, combined with its halophytic traits, make it suitable for bioremediation and monitoring programs.

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Desert shrubs are keystone species for plant diversity and ecosystem function. Atriplex clivicola and Atriplex deserticola (Amaranthaceae) are native shrubs from the Atacama Desert that show contrasting altitudinal distribution (A. clivicola: 0-700 m.a.s.l.; A. deserticola: 1500-3000 m.a.s.l.). Both species possess a C4 photosynthetic pathway and Kranz anatomy, traits adaptive to high temperatures. Historical records and projections for the near future show trends in increasing air temperature and frequency of heat wave events in these species' habitats. Besides sharing a C4 pathway, it is not clear how their leaf-level physiological traits associated with photosynthesis and water relations respond to heat stress. We studied their physiological traits (gas exchange, chlorophyll fluorescence, water status) before and after a simulated heat wave (HW). Both species enhanced their intrinsic water use efficiency after HW but via different mechanisms. A. clivicola, which has a higher LMA than A. deserticola, enhances water saving by closing stomata and maintaining RWC (%) and leaf Ψmd potential at similar values to those measured before HW. After HW, A. deserticola showed an increase of Amax without concurrent changes in gs and a significant reduction of RWC and Ψmd. A. deserticola showed higher values of Chla fluorescence after HW. Thus, under heat stress, A. clivicola maximizes water saving, whilst A. deserticola enhances its photosynthetic performance. These contrasting (eco)physiological strategies are consistent with the adaptation of each species to their local environmental conditions at different altitudes.

RESUMO

Halophytes, plants capable of growing under saline conditions, are an important source of bacteria with biotechnological potential for plant growth under extreme conditions. In this study, we evaluated the halophyte Atriplex nummularia bacteriome assemblage from three different salinized sites in northeastern Brazil with different edaphoclimatic characteristics, understanding the participation of the plant in the assembly of its microbiome. We sampled 30 specimens, from which the leaves, roots, and rhizospheric soil were subjected to 16S rRNA gene sequencing, bringing forth patterns of alpha and beta diversity, taxonomical composition, co-occurrence network, and the core microbiome of each compartment. Overall, this species harbors a very restricted set of endophytic microbes, and communities showed an increasing gradient of complexity (soil > root > leaf), reflecting a change in the main selective pressure being active over the microbial community. Although the leaf bacteriome was influenced basically by host factors, the soil community was modulated by the environment, and the root bacteriome was structured by both factors. These results help us understand how plant-microbe interactions occur in saline environments. As these plants shelter microbes that potentially alleviate abiotic stresses, we discuss how culture-independent methods could contribute to the prospection of plant growth promoting bacteria in plants.

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BACKGROUND AND AIMS: Atripliceae evolved and diversified by dispersals and radiations across continents in both hemispheres, colonizing similar semi-arid, saline-alkaline environments throughout the world. Meanwhile, its species developed different life forms, photosynthetic pathways, mono- or dioecy, and different morphological features in flowers, fruiting bracteoles and seeds. In this study, we introduce a first approach to the macroevolutionary patterns and diversification dynamics of the Atripliceae to understand how time, traits, speciation, extinction and new habitats influenced the evolution of this lineage. METHODS: We performed molecular phylogenetic analyses and clade age estimation of Atripliceae to apply time-, trait- and geographic-dependent diversification analyses and ancestral state reconstructions to explore diversification patterns within the tribe. KEY RESULTS: Opposite diversification dynamics within the two major clades of Atripliceae, the Archiatriplex and Atriplex clades, could explain the unbalanced species richness between them; we found low mean speciation rates in the Archiatriplex clade and one shift to higher speciation rates placed in the branch of the Atriplex core. This acceleration in diversification seems to have started before the transition between C3 and C4 metabolism and before the arrival of Atriplex in the Americas, and matches the Mid-Miocene Climatic Optimum. Besides, the American species of Atriplex exhibit slightly higher net diversification rates than the Australian and Eurasian ones. While time seems not to be associated with diversification, traits such as life form, photosynthetic pathway and plant sex may have played roles as diversification drivers. CONCLUSIONS: Traits more than time played a key role in Atripliceae diversification, and we could speculate that climate changes could have triggered speciation. The extreme arid or saline environments where Atripliceae species prevail may explain its particular evolutionary trends and trait correlations compared with other angiosperms and highlight the importance of conservation efforts needed to preserve them as genetic resources to deal with climatic changes.

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In this work, we partially sequenced genomes of two Atriplex species (A. deserticola Phil. and A. atacamensis Phil.), using Illumina technology (Hiseq 2500 paired-end system) and de novo assembly strategy. Raw data of A. deserticola and A. atacamensis are available from NCBI-Bioproject, PRJNA495747 and PRJNA495763 accessions, respectively. A total of 127086 and 134984 microsatellite or simple sequence repeat (SSR) markers were identified within A. deserticola and A. atacamensis genomic DNA, respectively. In addition, predicted putative genes in A. deserticola and A. atacamensis sequences are also presented in this article.

RESUMO

Microbes from hypersaline environments are useful in biotechnology as sources of novel enzymes and proteins. The current study aimed to characterize halophilic bacteria from the rhizosphere of halophytes (Salsola stocksii and Atriplex amnicola), non-rhizospheric, and brine lake-bank soils collected from Khewra Salt Mine and screening of these bacterial strains for industrially important enzymes. A total of 45 bacterial isolates from the rhizosphere of Salsola, 38 isolates from Atriplex, 24 isolates from non-rhizospheric, and 25 isolates from lake-bank soils were identified by using 16S rRNA gene analysis. Phylogenetic analysis showed that bacterial strains belonging to Bacillus, Halobacillus, and Kocuria were dominant in the rhizosphere of halophytes (Salsola and Atriplex), and Halobacillus and Halomonas were dominating genera from non-rhizospheric and lake-bank soils. Mostly identified strains were moderately halophilic bacteria with optimum growth at 1.5-3.0 M salt concentrations. Most of the bacterial exhibited lipase, protease, cellulase, amylase, gelatinase, and catalase activities. Halophilic and halotolerant Bacilli (AT2RP4, HL1RS13, NRS4HaP9, and LK3HaP7) identified in this study showed optimum lipase, protease, cellulase, and amylase activities at 1.0-1.5 M NaCl concentration, pH 7-8, and temperature 37 °C. These results indicated that halophilic and halotolerant bacteria can be used for bioconversion of organic compounds to useful products under extreme conditions.

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The aim of this experiment was to evaluate, by means of the semi-automated in vitro gas production technique, fermentation kinetics of carbohydrates and degradability of dry matter (DM) and organic matter (OM) of diets containing oldman saltbush hay levels (8.4, 18.8, 31.2 and 48.3%) associated to forage cactus in natura. Pressure readings of the gases were done with a pressure transducer at 2, 4, 6, 8, 10, 12, 17, 20, 24, 28, 34, 48, 72 and 96h post-inoculation. The rumen kinetics was described by the following parameters: maximum potential of gas production, lag time and production rates of gas (k), fibrous carbohydrates (FC) and non-fibrous carbohydrates (NFC). It could be observed that the addition of oldman saltbush hay to the diets promoted a quadratic effect in the production of gases originated from NFC. However, there was no significant effect on the production of gases originated from FC and on production rates of gases from NFC and FC. The degradability of DM and OM did not differ due to the addition of oldman saltbush hay. The use of 8.4% hay and 74.9% forage cactus promoted the maximum potential of production of gases from the fibrous fraction of diets containing cactus and oldman saltbush hay.(AU)

O objetivo deste experimento foi avaliar, por meio da técnica in vitro semiautomática de produção de gases, a cinética de fermentação dos carboidratos e a degradabilidade da matéria seca (MS) e da orgânica (MO) de dietas contendo níveis de feno de erva-sal (8,4, 18,8, 31,2 e 48,3%) associado à palma forrageira in natura. As leituras de pressão dos gases foram feitas com transdutor de pressão às 2, 4, 6, 8, 10, 12, 14, 17, 20, 24, 28, 34, 48, 72, 96 horas pós-inoculação. A cinética ruminal foi descrita pelos parâmetros: potencial máximo de produção de gases, "lag time" e taxa de produção de gases (k) dos carboidratos fibrosos (CF) e não fibrosos (CNF). Verificou-se que a adição de feno de erva-sal às dietas promoveu efeito quadrático na produção de gases provenientes dos CNF, em que o menor valor observado (136,48mL) foi encontrado com a adição de 38,25% de feno, e o maior valor, com a adição de 8,4% de feno e 74,9% de palma forrageira. O tempo de latência teve comportamento quadrático em função da adição de feno. No entanto não houve efeito significativo na produção de gases provenientes dos CF (média de 111,6mL) e nas taxas de produção de gases dos CNF e CF que apresentaram média de 0,090h-1 e 0,028h-1, respectivamente. A degradabilidade da MS e MO não diferiram em função da adição de feno de erva-sal e apresentaram médias de 85,8 e 90,9%, respectivamente. O uso de 8,4% de feno e 74,9 de palma forrageira propiciou o máximo potencial de produção de gases da fração fibrosa de dietas contendo palma e feno de erva-sal.(AU)

Assuntos

RESUMO

The aim of this experiment was to evaluate, by means of the semi-automated in vitro gas production technique, fermentation kinetics of carbohydrates and degradability of dry matter (DM) and organic matter (OM) of diets containing oldman saltbush hay levels (8.4; 18.8; 31.2 and 48.3%) associated to forage cactus in natura. Pressure readings of the gases were done with a pressure transducer at 2, 4, 6, 8, 10, 12, 17, 20, 24, 28, 34, 48, 72 and 96h post-inoculation. The rumen kinetics was described by the following parameters: maximum potential of gas production, lag time and production rates of gas (k), fibrous carbohydrates (FC) and non-fibrous carbohydrates (NFC). It could be observed that the addition of oldman saltbush hay to the diets promoted a quadratic effect in the production of gases originated from NFC. However, there was no significant effect on the production of gases originated from FC and on production rates of gases from NFC and FC. The degradability of DM and OM did not differ due to the addition of oldman saltbush hay. The use of 8.4% hay and 74.9% forage cactus promoted the maximum potential of production of gases from the fibrous fraction of diets containing cactus and oldman saltbush hay.

O objetivo deste experimento foi avaliar, por meio da técnica in vitro semiautomática de produção de gases, a cinética de fermentação dos carboidratos e a degradabilidade da matéria seca (MS) e da orgânica (MO) de dietas contendo níveis de feno de erva-sal (8,4; 18,8; 31,2 e 48,3%) associado à palma forrageira in natura. As leituras de pressão dos gases foram feitas com transdutor de pressão às 2, 4, 6, 8, 10, 12, 14, 17, 20, 24, 28, 34, 48, 72, 96 horas pós-inoculação. A cinética ruminal foi descrita pelos parâmetros: potencial máximo de produção de gases, "lag time" e taxa de produção de gases (k) dos carboidratos fibrosos (CF) e não fibrosos (CNF). Verificou-se que a adição de feno de erva-sal às dietas promoveu efeito quadrático na produção de gases provenientes dos CNF, em que o menor valor observado (136,48mL) foi encontrado com a adição de 38,25% de feno, e o maior valor, com a adição de 8,4% de feno e 74,9% de palma forrageira. O tempo de latência teve comportamento quadrático em função da adição de feno. No entanto não houve efeito significativo na produção de gases provenientes dos CF (média de 111,6mL) e nas taxas de produção de gases dos CNF e CF que apresentaram média de 0,090h-1 e 0,028h-1, respectivamente. A degradabilidade da MS e MO não diferiram em função da adição de feno de erva-sal e apresentaram médias de 85,8 e 90,9%, respectivamente. O uso de 8,4% de feno e 74,9 de palma forrageira propiciou o máximo potencial de produção de gases da fração fibrosa de dietas contendo palma e feno de erva-sal.

Assuntos

RESUMO

In Venezuela, Atriplex is represented by A. cristata and A. oestophora, the latter being endemic; they inhabit coastal areas with high temperatures, high solar radiation and sandy soils with high salt content. This work aimed to provide information to facilitate and clarify these species taxonomic delimitation, throughout the study of the anatomy of their vegetative organs; this may also clarify our understanding of their adaptability to soil and climatic conditions prevailing in areas they inhabit. The plant material was collected from at least three individu- als of each species in Punta Taima Taima and Capatárida, Falcon. Segments of roots, located near the neck and towards the apex, apical, middle and basal internodes of stems, were taken; and of leaves, located in the middle portion of plants. This material was fixed in FAA (formaldehyde, acetic acid, 70% ethanol) until processing. Semipermanent and permanent microscope slides were prepared with transverse or longitudinal sections, made using a razor (free-hand) or a rotation microtome, in this latter case, after paraffin embedding; besides, additional plates were mounted with portions of leaf epidermis, obtained by the maceration technique. The sections were stained with aqueous toluidine blue (1%) or safranin-fast-green, and mounted in water-glycerin or in Canada balsam. In order to calculate the vulnerability index, the vessel diameter in the vascular rings of roots, as well as their density, were quantified. Our results revealed structural features in the different organs, that resulted of taxonomic value and allowed the distinction of the species: in the leaf, the presence of aquifer tissue, the number of vascular bundles and their organization in the midrib, and the collenchyma differentiation in this part of the leaf; in the roots, the xylem and phloem arrangement in the growth rings, the nature of conjunctive tissue, and the presence of included phloem in one species. In addition, the species showed typical anatomical features of halophytes and xerophytes, such as: high density of trichomes on leaves and young stems which act as salt secreting glands, abundant sclerenchyma in stems and roots, water storage tissue and Kranz anatomy in leaves, narrow cortical region in young roots, presence of cambial variants in stems and roots, as well as short and narrow xylem vessels. Vulnerability index calculations indicated that both species tend to assure conduction but not the efficiency of the system. Atriplex species have anatomical characters which facilitate their adaptation to the special conditions prevailing in their habitats and that may be used for taxonomic delimitation.

En Venezuela, Atriplex está representado por A. cristata y A. oestophora, siendo esta última endémica, las mismas habitan zonas costeras con altas temperaturas, alta radiación solar y suelos arenosos con alto contenido de sales. Se caracterizaron anatómicamente sus órganos vegetativos con el fin de aportar rasgos para delimitarlas taxonómicamente y precisar caracteres que contribuyan a su adaptabilidad a las condiciones edafoclimáticas imperantes en su hábitat. El material vegetal fue recolectado en tres individuos de cada especie en Punta Taima Taima y Capatárida (Falcón). Se recolectaron segmentos de raíces próximos al cuello y al ápice; entrenudos basales, medios y apicales, y hojas ubicadas en la porción media de las plan- tas. Este material fue fijado en FAA (formaldehido, ácido acético y etanol 70%) hasta su procesamiento. Se prepara- ron láminas semipermanentes y permanentes con secciones transversales y longitudinales hechas a mano alzada o con micrótomo, en este último caso posterior a la inclusión en parafina. Adicionalmente, se realizaron macerados con el fin de obtener las epidermis foliares. Las secciones fueron teñidas con azul de toluidina acuosa (1%) o con safranina- fastgreen, montándolas en agua/glicerina o en bálsamo de Canadá. Se cuantificó el número de vasos y su densidad en los anillos vasculares de las raíces, para calcular el índice de vulnerabilidad. Se encontraron rasgos estructurales de valor taxonómico: la presencia de tejido acuífero en la lámina foliar, el número de haces vasculares y su organización en el nervio medio, así como la diferenciación de colénquima en el mismo; además, el arreglo del xilema/ floema en los anillos de crecimiento, la naturaleza del tejido conjuntivo, así como la presencia de floema incluso, en las raíces. Se detectaron caracteres anatómicos típicos de halófitas y xerófitas, como son: alta densidad de tricomas en hojas y tallos jóvenes, que actúan como glándulas secretoras de sal, abundancia de esclerénquima en tallos y raíces, tejidos reservantes de agua y anatomía Kranz en hojas, región cortical estrecha en raíces jóvenes, presencia de variantes cambiales en tallos y raíces, así como vasos cortos y estrechos en el xilema. El índice de vulnerabilidad indica que ambas especies tienden a asegurar la conducción, pero no la eficiencia del sistema. Las especies de Atriplex que crecen en Venezuela tienen caracteres que permiten su delimitación taxonómica y que facilitan su adaptación a las condiciones particulares de su hábitat.

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Objetivou-se com o presente estudo avaliar diferentes níveis (0, 20, 40 e 60%) de inclusão de erva-sal na dinâmica fermentativa da silagem de cana-de-açúcar. Utilizou-se delineamento experimental inteiramente casualizado com quatro tratamentos e seis repetições. Após 90 dias, com a abertura dos silos, determinou-se os teores de carboidratos solúveis (CHO-Sol), etanol, ácidos orgânicos (lático, acético, propiônico, butírico), proteína bruta (PB), matéria mineral (MM), matéria seca (MS), fibra em detergente neutro livre de cinzas (FDNc), pH e poder tampão (PT); estimou-se a perda total de MS, perdas por efluente e gases, densidade e a recuperação da MS. Os níveis crescentes de erva-sal propiciaram diminuição das perdas totais de MS e por efluente, aumento de seu teor e recuperação desta. As silagens apresentaram pH adequado à conservação (3,70) e concentração de minerais acrescidos. As concentrações de etanol foram influenciadas (P 0,05) pelo incremento de erva-sal, em que se observou redução de 51,84%, com 40% de erva-sal na silagem de cana. A adição de erva-sal reduz as perdas de MS e a produção de etanol e, melhora a qualidade fermentativa da silagem de cana-de-açúcar.(AU)

The objective of this study was to evaluate different inclusion levels (0, 20, 40 and 60%) of old man saltbush in the fermentation dynamics of sugarcane silages. The experiment was carried out as a completely randomized design with four treatments and six replicates. After 90 days, with the opening of the silos, the levels of water soluble carbohydrates, ethanol, organic acids (lactic, acetic, propionic, butyric acid), crude protein (CP), mineral matter (MM), dry matter (DM), neutral detergent fiber ash free (NDFa), pH and buffer capacity were determined; and, the losses by gas, effluent and total of dry mater, density and dry matter recovery were estimated. Increasing levels of saltbush propitiated reduction in losses: by effluent and total dry matter, it also increased the concentration and recovery. The silages showed pH suitable for conservation (3.70) and mineral concentration increased. The ethanol concentrations were influenced (P 0.05) by the increase of saltbush, where reduction of 51.84% was observed, with 40% saltbush in sugarcane silage. The addition of saltbush reduces dry matter losses and ethanol production and, improves the quality of sugarcane silage.(AU)

Assuntos

RESUMO

Objetivou-se com o presente estudo avaliar diferentes níveis (0, 20, 40 e 60%) de inclusão de erva-sal na dinâmica fermentativa da silagem de cana-de-açúcar. Utilizou-se delineamento experimental inteiramente casualizado com quatro tratamentos e seis repetições. Após 90 dias, com a abertura dos silos, determinou-se os teores de carboidratos solúveis (CHO-Sol), etanol, ácidos orgânicos (lático, acético, propiônico, butírico), proteína bruta (PB), matéria mineral (MM), matéria seca (MS), fibra em detergente neutro livre de cinzas (FDNc), pH e poder tampão (PT); estimou-se a perda total de MS, perdas por efluente e gases, densidade e a recuperação da MS. Os níveis crescentes de erva-sal propiciaram diminuição das perdas totais de MS e por efluente, aumento de seu teor e recuperação desta. As silagens apresentaram pH adequado à conservação (≤3,70) e concentração de minerais acrescidos. As concentrações de etanol foram influenciadas (P<0,05) pelo incremento de erva-sal, em que se observou redução de 51,84%, com 40% de erva-sal na silagem de cana. A adição de erva-sal reduz as perdas de MS e a produção de etanol e, melhora a qualidade fermentativa da silagem de cana-de-açúcar.

The objective of this study was to evaluate different inclusion levels (0, 20, 40 and 60%) of old man saltbush in the fermentation dynamics of sugarcane silages. The experiment was carried out as a completely randomized design with four treatments and six replicates. After 90 days, with the opening of the silos, the levels of water soluble carbohydrates, ethanol, organic acids (lactic, acetic, propionic, butyric acid), crude protein (CP), mineral matter (MM), dry matter (DM), neutral detergent fiber ash free (NDFa), pH and buffer capacity were determined; and, the losses by gas, effluent and total of dry mater, density and dry matter recovery were estimated. Increasing levels of saltbush propitiated reduction in losses: by effluent and total dry matter, it also increased the concentration and recovery. The silages showed pH suitable for conservation (≤3.70) and mineral concentration increased. The ethanol concentrations were influenced (P<0.05) by the increase of saltbush, where reduction of 51.84% was observed, with 40% saltbush in sugarcane silage. The addition of saltbush reduces dry matter losses and ethanol production and, improves the quality of sugarcane silage.

RESUMO

Los suelos salinos, característicos de zonas áridas, pueden afectar la germinación de las especies por presentar bajos potenciales hídricos o por toxicidad iónica. En este trabajo se determinó el efecto del estrés hídrico y salino sobre la germinación de Atriplex nummularia, una alternativa forrajera para zonas áridas. Las semillas fueron escarificadas para minimizar el efecto inhibidor de las brácteas y germinadas a 23 ºC sobre papel de germinación en soluciones con diferente potencial hídrico (-0,5, -1,0 y -1,5 MPa) de cloruro de sodio (NaCl) y polietilenglicol (PEG), utilizando agua destilada como control. El porcentaje de germinación y la velocidad de germinación fueron significativamente afectados por la concentración de la solución y el soluto utilizado. A valores de potencial osmótico más negativos el porcentaje de germinación y velocidad de germinación fueron significativamente menores. En los tres potenciales hídricos ensayados la velocidad y el porcentaje de semillas germinadas en NaCl fue significativamente menor que en PEG, siendo especialmente notoria esta diferencia a -1,0 MPa. Los datos sugieren que las semillas de A. nummularia presentan sensibilidad a la presencia de los iones Na+ y Cl- que afectan el proceso de germinación.

Saline soils, characteristic of arid zones, can affect the germination of the species due to low water potential or ion toxicity. The effect of water and saline stress on germination was evaluated in Atriplex nummularia a potential source of forage for arid zones. The seeds were scarified to reduce the inhibitory effect on germination and incubated in at 23 ºC on germination paper imbibed with solutions of sodium chloride (NaCl) and polyethylen glycol (PEG) at three water potentials: -0,5; -1,0 and -1,5 MPa. The percentage germination and germination speed were significantly affected by the concentration of the solution and the solute used. While more negative osmotic potentials, the percentage of germination and germination speed were significantly lower. The seeds germinated in PEG solution have higher germination and germination speed than the seeds germinated in NaCl, specially in -1,0 MPa. The data suggest that the seeds of A. nummularia show sensitivity to the presence of Na+ and Cl- ions affecting the germination process.

RESUMO

La familia Chenopodiaceae es reconocida en el Perú con cuatro géneros y 20 especies (Brako & Zarucchi, 1993; Ulloa Ulloa et al., 2004), todas hierbas y arbustos. En este trabajo reconocemos un endemismo en el género Atriplex. Esta especie endémica ocupa las regiones Desierto Cálido Tropical, Desierto Semicálido Tropical y Matorral Desértico, desde el nivel del mar hasta los 1150 m; no está representada en el Sistema Nacional de Áreas Naturales Protegidas por el Estado.

The Chenopodiaceae is represented in Peru by four genera and 20 species (Brako & Zarucchi, 1993; Ulloa Ulloa et al., 2004), all of them herbs and shrubs. Here we recognize one endemic species in Atriplex. This endemic species grows in the Tropical Costal Desert, Subtropical Costal Desert and Desert Shrubland regions, from sea level to 1150 m elevation. This endemic species is not found within Peru's protected area system.