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Seed germination demonstrates inter-annual variations in alkaline tolerance: a case study in perennial Leymus chinensis.
Zhao, Dandan; Ma, Hongyuan; Li, Shaoyang; Qi, Wenwen.
Afiliación
  • Zhao D; State Key Laboratory of Black Soils Conservation and Utilization, Northeast institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin, 130102, China.
  • Ma H; Shandong Key Laboratory of Eco-Environmental Science for Yellow River Delta, Shandong University of Aeronautics, Binzhou, Shandong, 256603, China.
  • Li S; State Key Laboratory of Black Soils Conservation and Utilization, Northeast institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin, 130102, China. mahongyuan@iga.ac.cn.
  • Qi W; State Key Laboratory of Black Soils Conservation and Utilization, Northeast institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin, 130102, China.
BMC Plant Biol ; 24(1): 397, 2024 May 14.
Article en En | MEDLINE | ID: mdl-38745144
ABSTRACT
BACKGROUND AND

AIMS:

The escalating issue of soil saline-alkalization poses a growing global challenge. Leymus chinensis is a perennial grass species commonly used in the establishment and renewal of artificial grasslands that is relatively tolerant of saline, alkaline, and drought conditions. Nonetheless, reduced seed setting rates limit its propagation, especially on alkali-degraded grassland. Inter-annual variations have an important effect on seed yield and germination under abiotic stress, and we therefore examined the effect of planting year on seed yield components of L. chinensis.

METHODS:

We grew transplanted L. chinensis seedlings in pots for two (Y2), three (Y3), or four (Y4) years and collected spikes for measurement of seed yield components, including spike length, seed setting rate, grain number per spike, and thousand seed weight. We then collected seeds produced by plants from different planting years and subjected them to alkaline stress (25 mM Na2CO3) for measurement of germination percentage and seedling growth.

RESULTS:

The seed setting rate of L. chinensis decreased with an increasing number of years in pot cultivation, but seed weight increased. Y2 plants had a higher seed setting rate and more grains per spike, whereas Y4 plants had a higher thousand seed weight. The effects of alkaline stress (25 mM Na2CO3) on seed germination were less pronounced for the heavier seeds produced by Y4 plants. Na2CO3 caused a 9.2% reduction in shoot length for seedlings derived from Y4 seeds but a 22.3% increase in shoot length for seedlings derived from Y3 seeds.

CONCLUSIONS:

Our findings demonstrate significant differences in seed yield components among three planting years of L. chinensis under pot cultivation in a finite space. Inter-annual variation in seed set may provide advantages to plants. Increased alkalinity tolerance of seed germination was observed for seeds produced in successive planting years.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Semillas / Germinación / Poaceae Idioma: En Revista: BMC Plant Biol Asunto de la revista: BOTANICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Semillas / Germinación / Poaceae Idioma: En Revista: BMC Plant Biol Asunto de la revista: BOTANICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido