| Texto completo | |
| Autor(es): |
Husein, Gustavo
;
Maia, Thiago
;
Castro-Moretti, Fernanda R.
;
Nunes, Jessica D. K.
;
Amorim, Lilian
;
Mazzafera, Paulo
;
Nijveen, Harm
;
Monteiro-Vitorello, Claudia B.
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | FOOD AND ENERGY SECURITY; v. 14, n. 5, p. 15-pg., 2025-10-21. |
| Resumo | |
Asian soybean rust (ASR), caused by Phakopsora pachyrhizi, is the most destructive foliar disease of soybean, with yield losses up to 90%. With climate change intensifying drought and expanding disease incidence, it is critical to understand how combined abiotic and biotic stresses influence plant defense. We investigated the transcriptomic response of a susceptible soybean cultivar to ASR infection under normal and water-limited conditions at four infection stages (12, 24, 72, and 192 h after inoculation). We observed a biphasic expression of defense-related genes, particularly resistance gene analogs (RGAs), with an early peak at 12 h and a late resurgence at 192 h. Combined stress induced a greater number of differentially expressed genes (DEGs) than rust alone, especially at early infection. Among the differentially expressed RGAs (RGADEs), over 64% belonged to the TM-LRR class, and NBS-LRR genes were the most enriched at known ASR resistance loci, particularly Rpp2. Water limitation strongly modulated gene expression at late stages, revealing stress-specific transcriptional reprogramming. These findings were consistent with the activation of potential cross-tolerance mechanisms in soybean, highlighted the temporal dynamics of RGADEs under dual stress, and provided potential targets for developing cultivars with improved resilience to both rust and water scarcity. (AU) | |
| Processo FAPESP: | 19/13191-5 - Componentes epidemiológicos, caracterização de danos e controle de ferrugens tropicais e temperadas em cenário de mudança climática global |
| Beneficiário: | Marcel Bellato Spósito |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |