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plant:rice [2026/06/26 09:09] – [Further reading] rkoebnikplant:rice [2026/06/26 09:49] (current) – [References] rkoebnik
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 The immune receptor XA21 is cleaved by the rhomboid-like protease OsRBL3b, likely within its transmembrane domain, which protects grain set and male fertility in rice. This balance between reproduction and disease resistance through the specific expression of a rhomboid protease may be key to limiting the detrimental effects of an active immune response (Vergish et al., 2025). The immune receptor XA21 is cleaved by the rhomboid-like protease OsRBL3b, likely within its transmembrane domain, which protects grain set and male fertility in rice. This balance between reproduction and disease resistance through the specific expression of a rhomboid protease may be key to limiting the detrimental effects of an active immune response (Vergish et al., 2025).
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 +The immune receptor XA21 causes semi-male sterility and grain loss in rice at a low temperature (24°C) and in a dose-dependent manner. This finding may explain the abundant accumulation of 17 transposable-like elements previously observed in the //Xa21// locus (de Toledo Franceschi et al., 2025).
  
 The small secreted peptide OsRALF26, previously identified as an //Oryza//-specific ligand for FERONIA-like receptor 1 (OsFLR1), is also directly perceived by XA21. OsRALF26 as a host-derived ligand of XA21 is required for full activation of XA21-mediated immunity in distal tissues, consistent with a role for OsRALF26 in spatial propagation of XA21-dependent defence (Kwon //et al.//, 2026). The small secreted peptide OsRALF26, previously identified as an //Oryza//-specific ligand for FERONIA-like receptor 1 (OsFLR1), is also directly perceived by XA21. OsRALF26 as a host-derived ligand of XA21 is required for full activation of XA21-mediated immunity in distal tissues, consistent with a role for OsRALF26 in spatial propagation of XA21-dependent defence (Kwon //et al.//, 2026).
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 Chu Z, Yuan M, Yao J, Ge X, Yuan B, Xu C, Li X, Fu B, Li Z, Bennetzen JL, Zhang Q, Wang S (2006). Promoter mutations of an essential gene for pollen development result in disease resistance in rice. Genes Dev. 20: 1250-1255. DOI: [[https://doi.org/10.1101/gad.1416306|10.1101/gad.1416306]] Chu Z, Yuan M, Yao J, Ge X, Yuan B, Xu C, Li X, Fu B, Li Z, Bennetzen JL, Zhang Q, Wang S (2006). Promoter mutations of an essential gene for pollen development result in disease resistance in rice. Genes Dev. 20: 1250-1255. DOI: [[https://doi.org/10.1101/gad.1416306|10.1101/gad.1416306]]
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 +de Toledo Franceschi B, Vergish S, Singh Y, Li JL, Shamsunnaher, Ding GL, Chen S, Song WY (2025). The immune receptor XA21 causes semi-male sterility and grain loss in rice. Front. Plant Sci. 16: 1673821. DOI: [[https://doi.org/10.3389/fpls.2025.1673821|10.3389/fpls.2025.1673821]]
  
 Endo T, Nakamura T, Yonemaru J, Ishikawa G, Yamaguchi M, Kataoka T, Nakagomi K, Yokogami N (2009). Genetic analysis of resistance against bacterial leaf blight and leaf blast disease in the Japanese rice cultivar Asominori. In: G.-L. Wang and B.Valent (eds.) Advances in Genetics, Genomics and Control of Rice Blast Disease, Springer, pp. 305-313. Endo T, Nakamura T, Yonemaru J, Ishikawa G, Yamaguchi M, Kataoka T, Nakagomi K, Yokogami N (2009). Genetic analysis of resistance against bacterial leaf blight and leaf blast disease in the Japanese rice cultivar Asominori. In: G.-L. Wang and B.Valent (eds.) Advances in Genetics, Genomics and Control of Rice Blast Disease, Springer, pp. 305-313.
plant/rice.1782461361.txt.gz · Last modified: 2026/06/26 09:09 by rkoebnik

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