Leaf structure and ultrastructure changes induced by heat stress and drought during seed fi lling in fi eld-grown soybean and their relationship with grain yield

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Studies focusing on terminal drought combined with heat impacts on plants of agronomic value remain scarce, and even less under fi eld conditions. The objective of this study was to investigate leaf structural and ultrastructural changes induced by heat stress (HS) and drought stress (DS) during...

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Autores principales: Carrera, Constanza Soledad, Solís, Stella Maris, Ferrucci, María Silvia, Vega, Claudia R. C., Galati, Beatriz Gloria, Ergo, Verónica, Andrade Adaniya, Fernando H., Lazcano, Hernán Ramiro
Formato: Artículo
Lenguaje:Inglés
Publicado: Academia Brasileira de Ciencias 2026
Materias:
Episodes of high temperatures
Late reproductive development
Leaf morpho-anatomy
Leaf photosynthetic performance
Seed number and weight
Water deficit
Acceso en línea:http://repositorio.unne.edu.ar/handle/123456789/59977
Aporte de:
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) de Universidad Nacional del Nordeste
id I48-R184-123456789-59977
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spelling I48-R184-123456789-599772026-02-04T10:14:08Z Leaf structure and ultrastructure changes induced by heat stress and drought during seed fi lling in fi eld-grown soybean and their relationship with grain yield Carrera, Constanza Soledad Solís, Stella Maris Ferrucci, María Silvia Vega, Claudia R. C. Galati, Beatriz Gloria Ergo, Verónica Andrade Adaniya, Fernando H. Lazcano, Hernán Ramiro Episodes of high temperatures Late reproductive development Leaf morpho-anatomy Leaf photosynthetic performance Seed number and weight Water deficit Studies focusing on terminal drought combined with heat impacts on plants of agronomic value remain scarce, and even less under fi eld conditions. The objective of this study was to investigate leaf structural and ultrastructural changes induced by heat stress (HS) and drought stress (DS) during seed fi lling and their relationship with physiological variables and yield determination. Two soybean cultivars were grown in fi eld conditions. During seed fi lling four treatments were applied, including a control (without manipulation, at ambient temperature and fi eld capacity), HS (episodes exceeding 32°C for 6 h d-1) during 21-d, DS (20% of fi eld capacity soil water content) during 35-d, and HS×DS. Drought principally reduced leaf area, whereas heat decreased leaf thickness, possible as acclimation strategies, but also irreversible reducing CO2 assimilation sites. Both stresses damaged the outer and inner membranes of chloroplasts, causing swollen chloroplasts and accumulation of plastoglobules, loss of chlorophyll content, and negatively affecting chlorophyll fl uorescence. Thus, the performance and integrity of the photosynthetic machinery were reduced. Through a morpho-functional perspective and a holistic multiscale approach, our results provide evidence of photosynthesis impairment and yield drops under stressful conditions which were associated with structural and ultrastructural (particularly at the level of chloroplasts) modifi cations of leaves. 2026-02-03T14:07:05Z 2026-02-03T14:07:05Z 2021 Artículo Carrera, Constanza Soledad, et al., 2021. Leaf structure and ultrastructure changes induced by heat stress and drought during seed fi lling in fi eld-grown soybean and their relationship with grain yield. Anais da Academia Brasileira de Ciencias. Rio de Janeiro: Academia Brasileira de Ciencias, vol. 93, no. 4, p. 1-27. E-ISSN 1678-2690. 0001-3765 http://repositorio.unne.edu.ar/handle/123456789/59977 eng https://www.scielo.br/j/aabc/a/Ybf8nVnzvYGF5ptzdsWPdqx/?lang=en openAccess http://creativecommons.org/licenses/by/2.5/ar/ application/pdf p. 1-27 application/pdf Academia Brasileira de Ciencias Anais da Academia Brasileira de Ciencias, 2021, vol. 93, no. 4, p. 1-27.
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-184
collection RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
language Inglés
topic Episodes of high temperatures
Late reproductive development
Leaf morpho-anatomy
Leaf photosynthetic performance
Seed number and weight
Water deficit
spellingShingle Episodes of high temperatures
Late reproductive development
Leaf morpho-anatomy
Leaf photosynthetic performance
Seed number and weight
Water deficit
Carrera, Constanza Soledad
Solís, Stella Maris
Ferrucci, María Silvia
Vega, Claudia R. C.
Galati, Beatriz Gloria
Ergo, Verónica
Andrade Adaniya, Fernando H.
Lazcano, Hernán Ramiro
Leaf structure and ultrastructure changes induced by heat stress and drought during seed fi lling in fi eld-grown soybean and their relationship with grain yield
topic_facet Episodes of high temperatures
Late reproductive development
Leaf morpho-anatomy
Leaf photosynthetic performance
Seed number and weight
Water deficit
description Studies focusing on terminal drought combined with heat impacts on plants of agronomic value remain scarce, and even less under fi eld conditions. The objective of this study was to investigate leaf structural and ultrastructural changes induced by heat stress (HS) and drought stress (DS) during seed fi lling and their relationship with physiological variables and yield determination. Two soybean cultivars were grown in fi eld conditions. During seed fi lling four treatments were applied, including a control (without manipulation, at ambient temperature and fi eld capacity), HS (episodes exceeding 32°C for 6 h d-1) during 21-d, DS (20% of fi eld capacity soil water content) during 35-d, and HS×DS. Drought principally reduced leaf area, whereas heat decreased leaf thickness, possible as acclimation strategies, but also irreversible reducing CO2 assimilation sites. Both stresses damaged the outer and inner membranes of chloroplasts, causing swollen chloroplasts and accumulation of plastoglobules, loss of chlorophyll content, and negatively affecting chlorophyll fl uorescence. Thus, the performance and integrity of the photosynthetic machinery were reduced. Through a morpho-functional perspective and a holistic multiscale approach, our results provide evidence of photosynthesis impairment and yield drops under stressful conditions which were associated with structural and ultrastructural (particularly at the level of chloroplasts) modifi cations of leaves.
format Artículo
author Carrera, Constanza Soledad
Solís, Stella Maris
Ferrucci, María Silvia
Vega, Claudia R. C.
Galati, Beatriz Gloria
Ergo, Verónica
Andrade Adaniya, Fernando H.
Lazcano, Hernán Ramiro
author_facet Carrera, Constanza Soledad
Solís, Stella Maris
Ferrucci, María Silvia
Vega, Claudia R. C.
Galati, Beatriz Gloria
Ergo, Verónica
Andrade Adaniya, Fernando H.
Lazcano, Hernán Ramiro
author_sort Carrera, Constanza Soledad
title Leaf structure and ultrastructure changes induced by heat stress and drought during seed fi lling in fi eld-grown soybean and their relationship with grain yield
title_short Leaf structure and ultrastructure changes induced by heat stress and drought during seed fi lling in fi eld-grown soybean and their relationship with grain yield
title_full Leaf structure and ultrastructure changes induced by heat stress and drought during seed fi lling in fi eld-grown soybean and their relationship with grain yield
title_fullStr Leaf structure and ultrastructure changes induced by heat stress and drought during seed fi lling in fi eld-grown soybean and their relationship with grain yield
title_full_unstemmed Leaf structure and ultrastructure changes induced by heat stress and drought during seed fi lling in fi eld-grown soybean and their relationship with grain yield
title_sort leaf structure and ultrastructure changes induced by heat stress and drought during seed fi lling in fi eld-grown soybean and their relationship with grain yield
publisher Academia Brasileira de Ciencias
publishDate 2026
url http://repositorio.unne.edu.ar/handle/123456789/59977
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