2026-04-17T13:53:04Zhttps://recercat.cat/oai/request

oai:recercat.cat:20.500.12327/28232025-10-22T11:29:58Zcom_2072_4428com_2072_4427col_2072_487898

00925njm 22002777a 4500 dc Calderone, Silvia author Mauri, Nuria author Manga-Robles, Alba author Fornalé, Silvia author García-Mir, Lluís author Centeno, María-Luz author Sánchez-Retuerta, Camila author Ursache, Robertas author Acebes, José-Luis author Campos, Narciso author García-Angulo, Penélope author Encina, Antonio author Caparrós-Ruiz, David author 2024-02-05 The plant cell wall is a plastic structure of variable composition that constitutes the first line of defence against environmental challenges. Lodging and drought are two stressful conditions that severely impact maize yield. In a previous work, we characterised the cell walls of two maize inbreds, EA2024 (susceptible) and B73 (resistant) to stalk lodging. Here, we show that drought induces distinct phenotypical, physiological, cell wall, and transcriptional changes in the two inbreds, with B73 exhibiting lower tolerance to this stress than EA2024. In control conditions, EA2024 stalks had higher levels of cellulose, uronic acids and p‐coumarate than B73. However, upon drought EA2024 displayed increased levels of arabinose‐enriched polymers, such as pectin‐arabinans and arabinogalactan proteins, and a decreased lignin content. By contrast, B73 displayed a deeper rearrangement of cell walls upon drought, including modifications in lignin composition (increased S subunits and S/G ratio; decreased H subunits) and an increase of uronic acids. Drought induced more substantial changes in gene expression in B73 compared to EA2024, particularly in cell wall‐related genes, that were modulated in an inbred‐specific manner. Transcription factor enrichment assays unveiled inbred‐specific regulatory networks coordinating cell wall genes expression. Altogether, these findings reveal that B73 and EA2024 inbreds, with opposite stalk‐lodging phenotypes, undertake different cell wall modification strategies in response to drought. We propose that the specific cell wall composition conferring lodging resistance to B73, compromises its cell wall plasticity, and renders this inbred more susceptible to drought. Calderone, Silvia, Nuria Mauri, Alba Manga‐Robles, Silvia Fornalé, Lluís García‐Mir, Marı́a Luz Centeno, Camila Sánchez‐Retuerta, et al. 2024. “Diverging Cell Wall Strategies for Drought Adaptation in Two Maize Inbreds With Contrasting Lodging Resistance.” Plant, Cell & Environment 47 (5): 1747–1768. https://doi.org/10.1111/pce.14822. 1365-3040 http://hdl.handle.net/20.500.12327/2823 https://doi.org/10.1111/pce.14822 Diverging cell wall strategies for drought adaptation in two maize inbreds with contrasting lodging resistance