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Leaf development stages and ontogenetic changes in passionfruit (Passiflora edulis Sims.) are detected by narrowband spectral signal.
Fernandes, Amanda Mendes; Fortini, Evandro Alexandre; Müller, Larissa Areal de Carvalho; Batista, Diego Silva; Vieira, Lorena Melo; Silva, Priscila Oliveira; Amaral, Cibele Hummel do; Poethig, Richard Scott; Otoni, Wagner Campos.
Afiliação
  • Fernandes AM; Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG, Brazil.
  • Fortini EA; Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG, Brazil.
  • Müller LAC; Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG, Brazil.
  • Batista DS; Departamento de Agricultura, Universidade Federal da Paraíba, Campus III, 58220-000, Bananeiras, Paraíba, Brazil.
  • Vieira LM; Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG, Brazil.
  • Silva PO; Instituto de Educação, Agricultura e Ambiente, Universidade Federal do Amazonas, Humaitá, AM, Brazil.
  • Amaral CHD; Departamento de Engenharia Florestal, Universidade Federal de Viçosa, Viçosa, MG, Brazil.
  • Poethig RS; Department of Biology, University of Pennsylvania, Philadelphia, PA, USA.
  • Otoni WC; Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG, Brazil. Electronic address: wcotoni@ufv.br.
J Photochem Photobiol B ; 209: 111931, 2020 Aug.
Article em En | MEDLINE | ID: mdl-32559646
During shoot development, leaves undergo various ontogenetic changes, including variation in size, shape, and geometry. Passiflora edulis (passionfruit) is a heteroblastic species, which means that it experiences conspicuous changes throughout development, enabling a morphological distinction between the juvenile and adult vegetative phases. Quantification of heteroblasty requires a practical, inexpensive, reliable, and non-destructive method, such as remote sensing. Moreover, relationships among ontogenetic changes and spectral signal at leaf level can be scaled up to support precision agriculture in passion fruit crops. In the present study, we used laboratory spectroscopic measurements (400-2500 nm) and narrowband vegetation indexes (or hyperspectral vegetation indexes - HVIs) to evaluate ontogenetic changes related to development and aging in P. edulis leaves. We also assessed leaf pigment concentration to further support the application of biochemical-related narrowband indexes. We report that 30-d-old leaves can be discriminated into developmental stages through their spectral signals. MSI (Moisture Stress Index) and NDVI750 (Normalized Difference Vegetation Index ρ750) contribute most to the variation of age (15 to 30-d-old leaves) and developmental stage (phytomer positions along the plant axis) in passionfruit leaves. PRI (Photochemical Reflectance Index) played an important role in detecting age and development alterations, including heteroblasty. A biochemical and spectral comparison of pigments revealed that spectroscopy offered potential for diagnosing phenology in P. edulis, as some narrowband indexes correlated strongly with chlorophylls and carotenoids content. Narrowband vegetation indexes are found to be a suitable tool for monitoring passionfruit crops.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Análise Espectral / Folhas de Planta / Passiflora Idioma: En Revista: J Photochem Photobiol B Assunto da revista: BIOLOGIA Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil País de publicação: Suíça
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Análise Espectral / Folhas de Planta / Passiflora Idioma: En Revista: J Photochem Photobiol B Assunto da revista: BIOLOGIA Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil País de publicação: Suíça