Natural variation in LONELY GUY-Like 1 regulates rice grain weight under warmer night conditions

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dc.creatorSandhu, Jaspreet
dc.creatorIrvin, Larissa
dc.creatorChandaran, Anil Kumar
dc.creatorOguro, Shohei
dc.creatorPaul, Puneet
dc.creatorDhatt, Balpreet
dc.creatorHussain, Waseem
dc.creatorCunningham, Shannon S.
dc.creatorQuinones, Cherryl O.
dc.creatorLorence, Argelia
dc.creatorAdviento-Borbe, Maria Arlene
dc.creatorStaswick, Paul
dc.creatorMorota, Gota
dc.creatorWalia, Harkamal
dc.date2024-09-02
dc.date2024-12-19T12:53:02Z
dc.date2024-12-19T12:53:02Z
dc.date.accessioned2026-06-27T04:12:02Z
dc.descriptionGlobal nighttime temperatures are rising at twice the rate of daytime temperatures and pose a challenge for rice (Oryza sativa) production. High nighttime temperature (HNT) stress affects rice yield by reducing grain weight, size, and fertility. Although the genes associated with these yield parameters have been identified and characterized under normal temperatures, the genetic basis of grain weight regulation under HNT stress remains less explored. We examined the natural variation for rice single grain weight (SGW) under HNT stress imposed during grain development. A genome-wide association analysis identified several loci associated with grain weight under HNT stress. A locus, SGW1, specific to HNT conditions resolved to LONELY GUY-Like 1 (LOGL1), which encodes a putative cytokinin-activation enzyme. We demonstrated that LOGL1 contributes to allelic variation at SGW1. Accessions with lower LOGL1 transcript abundance had higher grain weight under HNT. This was supported by the higher grain weight of logl1-mutants relative to the wild type under HNT. Compared to logl1-mutants, LOGL1 over-expressers showed increased sensitivity to HNT. We showed that LOGL1 regulates the thiamin biosynthesis pathway, which is under circadian regulation, which in turn is likely perturbed by HNT stress. These findings provide a genetic source to enhance rice adaptation to warming night temperatures and improve our mechanistic understanding of HNT stress tolerance pathways.
dc.identifierhttps://hdl.handle.net/10568/163804
dc.identifier.urihttp://hdl.handle.net/123456789/24854
dc.languageen
dc.publisherOxford University Press
dc.rightsOpen Access
dc.sourceSandhu, J., Irvin, L., Chandaran, A.K., Oguro, S., Paul, P., Dhatt, B., Hussain, W., Cunningham, S.S., Quinones, C.O., Lorence, A., Adviento-Borbe, M.A., Staswick, P., Morota, G. and Walia, H. 2024. Natural variation in LONELY GUY-Like 1 regulates rice grain weight under warmer night conditions. Plant Physiology, Volume 196 (1), pp. 164-180
dc.titleNatural variation in LONELY GUY-Like 1 regulates rice grain weight under warmer night conditions
dc.typeJournal Article

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Instituto Internacional de Investigación del Arroz (IRRI)