Title:	Ecophysiological characterization of sorghum genotypes submitted to water deficit tolerance.
Authors:	SIMEONE, M. L. F. MAGALHAES, P. C. CARNEIRO, N. P. GOMES JÚNIOR, C. C. AVILA, R. G. SOUZA, T. C. de OLIVEIRA, A. C. de
Affiliation:	MARIA LUCIA FERREIRA SIMEONE, CNPMS; PAULO CESAR MAGALHAES, CNPMS; NEWTON PORTILHO CARNEIRO, CNPMS; CARLOS CÉSAR GOMES JÚNIOR, Universidade Federal de Alfenas; RONIEL GERALDO AVILA, Instituto Federal Goiano; THIAGO CORRÊA DE SOUZA, Universidade Federal de Alfenas; ANTONIO CARLOS DE OLIVEIRA, CNPMS.
Date Issued:	2021
Citation:	In: GOES, R. J. (org.). Cadeias produtivas e novas tecnologias: aspectos econômicos, ecológicos e sociais. Ponta Grossa: Atena, 2021.
Pages:	p. 69-83.
Description:	Sorghum [Sorghum bicolor (L.)] is one of the most drought tolerant cereal and many studies have been done to understand the mechanisms involved in this process. In this work, we evaluated in the greenhouse the effects of different levels of water stress on the ecophysiological characteristics and accumulation of soluble sugars in two contrasting sorghum [Sorghum bicolor (L.) Moench] inbred lines for drought tolerance: 9910032 (tolerant) and 9618158 (sensitive). Water stress was imposed in both genotypes at pre-flowering growth stage for two different time exposure: mild (6 days of drought); severe (12 days). Recovery treatments for each drought treatment were also done at six days after the stress. Sensitive and tolerant genotypes showed lower stomatal conductance and leaf water potential for all types of stress when compared to irrigated treatments. An increase in total soluble sugar content was observed in leafs of the two sorghum genotypes however higher in the tolerant line. Overall, the genotype 9910032 presented higher photosynthetic rate and grain yield in relation to the sensitive genotype 9615818, in the same water condition. These results indicated that sugar content is modified under water deficit conditions indicating that if might be involved in plant protection.
Thesagro:	Evapotranspiração Resistência a Seca Grão Rendimento Sorgo Deficiência Hídrica
Keywords:	Taxa fotossintética Açúcares solúveis Caracterização ecofisiológica Déficit hídrico
Type of Material:	Parte de livro
Access:	openAccess
Appears in Collections:	Capítulo em livro científico (CNPMS)