Data/hora: 04/06/2024 10:10:31

Biblioteca(s): | Embrapa Milho e Sorgo.
Data corrente: | 19/06/2023
Data da última atualização: | 15/07/2023
Autoria: | OLIVEIRA, J. P. V. de; DUARTE, V. P.; CASTRO, E. M. de; MAGALHAES, P. C.; PEREIRA, F. J.
Afiliação: | JEAN PAULO VITOR DE OLIVEIRA, Universidade Federal de Lavras; VINÍCIUS POLITI DUARTE, Universidade Federal de Lavras; EVARISTO MAURO DE CASTRO, Universidade Federal de Lavras; PAULO CESAR MAGALHAES, CNPMS; FABRICIO JOSÉ PEREIRA, Universidade Federal de Alfenas.
Título: | Contrasting leaf intercellular space development in sorghum and maize modulates different tolerance capacity to water limitation.
Ano de publicação: | 2023
Fonte/Imprenta: | Journal of Plant Research, v. 136, n. 4, p. 535-548, 2023.
DOI: | https://doi.org/10.1007/s10265-023-01463-7
Idioma: | Inglês
Conteúdo: | The objective of this study was to evaluate the relationship between intercellular spaces and leaf gas exchange and the effect of total intercellular space on the growth of maize and sorghum under water restriction. The experiments were conducted in a greenhouse in a 2 × 3 factorial arrangement (two plant types and three water conditions: field capacity (FC = 100%), 75%FC, and 50%FC) with 10 replicates. The lack of water was a limiting factor for maize because it showed reductions in leaf area, leaf thickness, biomass, and gas exchange parameters, while sorghum remained unchanged, maintaining its water-use efficiency. This maintenance was correlated with the growth of intercellular spaces in sorghum leaves because the increased internal volume led to better CO2 control and prevented excessive water loss under drought stress. In addition, sorghum had more stomata than maize. These characteristics contributed to the drought tolerance of sorghum, while maize could not make the same adjustments. Therefore, changes in intercellular spaces promoted adjustments to avoid water loss and may have improved CO2 diffusion, characteristics that are important for drought-tolerant plants.
Palavras-Chave: | Absorção de CO2; Área celular; Difusão de gases; Estresse hídrico; Relações hídricas.
Thesagro: | Deficiência Hídrica; Mesofilo; Milho; Sorgo.
Thesaurus Nal: | Mesophyll; Plant-water relations; Water stress.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (30094-1) - UPC - AP - DD -  -  -  - DIS