Data/hora: 05/06/2024 02:17:13

Biblioteca(s): | Embrapa Milho e Sorgo.
Data corrente: | 18/11/2021
Data da última atualização: | 14/06/2022
Autoria: | OLIVEIRA, J. P. V. de; DUARTE, V. P.; CASTRO, E. M. e; 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 E CASTRO, Universidade Federal de Lavras; PAULO CESAR MAGALHAES, CNPMS; FABRICIO JOSE PEREIRA, Universidade Federal de Alfenas.
Título: | Stomatal cavity modulates the gas exchange of Sorghum bicolor (L.) Moench. grown under diferent water levels.
Ano de publicação: | 2022
Fonte/Imprenta: | Protoplasma, v. 259, p. 1081-1097, 2022.
DOI: | https://doi.org/10.1007/s00709-021-01722-1
Idioma: | Inglês
Conteúdo: | This work aimed to evaluate the efects of lower water levels on leaf intercellular spaces and to assess their relations with the gas exchange, anatomy, and growth of Sorghum bicolor. Experiments were conducted in a greenhouse, in which plants were subjected to three water conditions (ten replicates, n = 30): well-irrigated, decreased irrigation, and limited irrigation. Lower water levels had no signifcant efect on the growth of S. bicolor but increased the biomass of the roots. Moreover, the number of leaves, leaf area, and leaf size as well as the chlorophyll content were not afected by lower water levels, and no signifcant changes were detected for whole plant photosynthesis, transpiration, or stomatal conductance. The water content of the plants and the water potential remained unchanged. However, compared with other treatments, the decreased irrigation decreased water loss and increased the water retention. Lower water levels increased the intercellular CO2 percentage, mesophyll area, and proportion of stomatal cavities and promoted minor changes in leaf tissue and stomatal traits. The increased stomatal cavities provided higher CO2 uptake and prevented excessive water loss. Thus, modifcations to the intercellular spaces promoted conditions to avoid excessive water loss while concurrently improving CO2 uptake, which are important traits for drought-tolerant plants.
Palavras-Chave: | Anatomia foliar; Cavidade estomática; Estresse hídrico; Leaf anatomy; Stomatal cavity; Troca gasosa.
Thesagro: | Anatomia Vegetal; Folha; Fotossíntese; Transpiração Vegetal.
Thesaurus Nal: | Gas exchange; Photosynthesis; Transpiration; Water stress.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (29678-1) - UPC - AP - DD -  -  -  - DIS