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Provedor de dados:  BJM
País:  Brazil
Título:  Physiological response of Cucurbita pepo var. pepo mycorrhized by Sonoran desert native arbuscular fungi to drought and salinity stresses
Autores:  Harris-Valle,Citlalli
Esqueda,Martín
Gutiérrez,Aldo
Castellanos,Alejandro E.
Gardea,Alfonso A.
Berbara,Ricardo
Data:  2018-03-01
Ano:  2018
Palavras-chave:  Glomus
Pacispora
Water status
Construction cost
Photosynthesis
Resumo:  ABSTRACT Plants response to symbiosis with arbuscular mycorrhizal fungi (AMF) under water stress is important to agriculture. Under abiotic stress conditions native fungi are more effective than exotics in improving plant growth and water status. Mycorrhization efficiency is related to soil fungi development and energy cost-benefit ratio. In this study, we assessed the effect on growth, water status and energy metabolism of Cucurbita pepo var. pepo when inoculated with native AMF from the Sonoran desert Mexico (mixed isolate and field consortium), and compared with an exotic species from a temperate region, under drought, low and high salinity conditions. Dry weights, leaf water content, water and osmotic potentials, construction costs, photochemistry and mycorrhization features were quantified. Under drought and low salinity conditions, the mixed isolate increased plant growth and leaf water content. Leaf water potential was increased only by the field consortium under drought conditions (0.5-0.9 MPa). Under high salinity, the field consortium increased aerial dry weight (more than 1 g) and osmotic potential (0.54 MPa), as compared to non-mycorrhized controls. Plants inoculated with native AMF, which supposedly diminish the effects of stress, exhibited low construction costs, increased photochemical capacity, and grew larger external mycelia in comparison to the exotic inoculum.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000100045
Editor:  Sociedade Brasileira de Microbiologia
Relação:  10.1016/j.bjm.2017.04.005
Formato:  text/html
Fonte:  Brazilian Journal of Microbiology v.49 n.1 2018
Direitos:  info:eu-repo/semantics/openAccess
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