Title:	Leaf application of chitosan and physiological evaluation of maize hybrids contrasting for drought tolerance under water restriction.
Authors:	VERONEZE JÚNIOR, V. MARTINS, M. MC LEOD, L. SOUZA, K. R. D. SANTOS FILHO, P. R. MAGALHAES, P. C. CARVALHO, D. T. SANTOS, M. H. SOUZA, T. C.
Affiliation:	Universidade 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.
Date Issued:	2020
Citation:	Brazilian Journal of Biology, v. 80, n. 3 p. 631-640, 2020.
Description:	It 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.
Thesagro:	Zea Mays
Keywords:	Estresse hídrico Troca gasosa Têmpera Fluorescência da clorofila
DOI:	10.1590/1519-6984.218391
Notes:	Publicado online em 2019.
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPMS)