Genotype-dependent response to water deficit: increases in maize cell wall digestibility occurs through reducing both p-coumaric acid and lignification of the rind
López-Malvar, Ana | Main, Oscar | Guillaume, Sophie | Jacquemot, Marie-Pierre | Meunier, Florence | Revilla, Pedro | Santiago, Rogelio | Méchin, Valérie | Reymond, Matthieu | Universidade de Vigo | Institut Jean-Pierre Bourgin - Sciences du végétal (IJPB) ; AgroParisTech-Université Paris-Saclay-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Ingénierie des Agro-polymères et Technologies Émergentes (UMR IATE) ; Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier ; Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Montpellier (UM) | DIASCOPE ; Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Mision Biologica de Galicia (MBG) ; Consejo Superior de Investigaciones Cientificas [España] = Spanish National Research Council [Spain] (CSIC) | Amélioration génétique et adaptation des plantes méditerranéennes et tropicales (UMR AGAP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier ; Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Montpellier (UM) | This work is part of the project ‘Identification des cibles Biochimiques et Histologiques impliquées dans la Réponse du maïs au déficit hydrIQUE (IBHERIQUE),’ funded by INRAE’s Department of Biology and Plant Breeding. Besides, Financial support has been provided by PRIMA, a program supported by the European Union under H2020 framework program, and PCI2021–121912 funded by MCIN/AEI/10.13039/501100011033; and the Spanish Ministerio de Innovación y Universidades (MCIU), the Agencia Estatal de Investigación (AEI) and the European Fund for Regional Development (FEDER), UE (project code PID2019-108127RB-I00). AL-M’s postdoctoral contract was granted by Xunta de Galicia’s program “Axudas de apoio a etapa de formación postdoutoral”. This work received support from the French government, managed by the National Research Agency (ANR), under the France 2030 investment plan, reference “ANR-22-PEBB-0006” FilligGaps. The IJPB benefits from the support of Saclay Plant Sciences-SPS (ANR-17-EUR-0007). This work has benefited from the support of IJPB’s imaging and microscopy platform (PO-Cyto). | ANR-22-PEBB-0006,FillingGaps,Filling the gaps between scales to understand biomass properties(2022) | ANR-10-LABX-0040,SPS,Saclay Plant Sciences(2010) | ANR-17-EURE-0007,SPS-GSR,Ecole Universitaire de Recherche de Sciences des Plantes de Paris-Saclay(2017)
International audience
Показать больше [+] Меньше [-]Английский. Introduction: The compositional dynamics of the cell wall are influenced by drought, and it has been demonstrated that water deficit induces significant changes in its main components. Moreover, changes in cell wall concentration and distribution in response to water deficit affect maize degradability.Material and methods: This study presents a histological and biochemical analysis of thirteen maize inbred lines, evaluated over two years in Pobra de Brollón (Spain) and Mauguio (France) under contrasting water availability conditions. Our aim was to investigate the environmental and genotypic impacts on histological and biochemical profiles, to assess in vitro cell wall digestibility under water deficit, and to explore how these responses relate to changes in cell wall composition and structure.Results and discussion: Overall, we observed greater concentrations of p-coumaric acid under control conditions, with significant decreases in stressed conditions at each location. Histologically, we found an increase in non-lignified tissues under water deficit conditions across all tissues at each location as well. In terms of in vitro cell wall digestibility (IVCWRD), significant increases were detected in response to water deficit. Additionally, genotype-dependent response patterns were evident, revealing two distinct behavioural groups. Notably, in plastic genotypes, increases in IVCWRD in response to water deficit were concomitant to reductions in p-coumaric acid content and a decrease in red-stained lignified tissues in the rind. This study emphasizes the complex, genotype-dependent responses to water deficit, underscoring the important roles of plasticity and stability in shaping the impact on maize cell wall digestibility; paving the way to breed for adapted genotypes to face climate changes.
Показать больше [+] Меньше [-]Ключевые слова АГРОВОК
Библиографическая информация
Эту запись предоставил Institut national de la recherche agronomique