Leaf application of chitosan and physiological evaluation of maize hybrids contrasting for drought tolerance under water restriction.

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dc.contributorUniversidade Federal de Alfenas; Universidade Federal de Alfenas; Universidade Federal de Alfenas; Universidade Federal de Alfenas; Universidade Federal de Alfenas; PAULO CESAR MAGALHAES, CNPMS; Universidade Federal de Alfenas; Universidade Federal de Viçosa; Universidade Federal de Alfenas.
dc.creatorVERONEZE JÚNIOR, V.
dc.creatorMARTINS, M.
dc.creatorMC LEOD, L.
dc.creatorSOUZA, K. R. D.
dc.creatorSANTOS FILHO, P. R.
dc.creatorMAGALHAES, P. C.
dc.creatorCARVALHO, D. T.
dc.creatorSANTOS, M. H.
dc.creatorSOUZA, T. C.
dc.date2020-08-14T11:10:11Z
dc.date2020-08-14T11:10:11Z
dc.date2019-11-05
dc.date2020
dc.date.accessioned2026-07-07T05:24:24Z
dc.descriptionIt is a fact that the regions that cultivate the most maize crop do not have fully adequate technologies to measure productivity losses caused by irregularities in water availability. The objective of this study was to evaluate the physiological characteristics of maize hybrids tolerant (DKB 390) and sensitive (BRS 1030) to drought, at V5 growth stage and under water restriction, in order to understand the mechanisms involved in the induction of tolerance to drought by chitosan in contrasting maize genotypes. Plants were cultivated in pots at a greenhouse, and chitosan 100 ppm was applied by leaf spraying. The water restriction was imposed for 10 days and then leaf gaseous exchange and chlorophyll fluorescence were evaluated. The tolerant hybrid (DKB 390) showed higher photosynthesis, stomatal conductance, carboxylation efficiency, electron transport rate, and non-photochemical quenching when chitosan was used. Plants from tolerant genotype treated with chitosan were more tolerant to water stress because there were more responsive to the biopolymer.
dc.descriptionPublicado online em 2019.
dc.identifierBrazilian Journal of Biology, v. 80, n. 3 p. 631-640, 2020.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1113902
dc.identifier10.1590/1519-6984.218391
dc.identifier.urihttp://hdl.handle.net/123456789/490097
dc.languageeng
dc.rightsopenAccess
dc.subjectEstresse hídrico
dc.subjectTroca gasosa
dc.subjectTêmpera
dc.subjectFluorescência da clorofila
dc.subjectZea Mays
dc.titleLeaf application of chitosan and physiological evaluation of maize hybrids contrasting for drought tolerance under water restriction.
dc.typeArtigo de periódico

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