GRAIN LENGTH AND AWN 1 negatively regulates grain size in rice. Issue 10 (16th January 2019)

• Record Type: Journal Article
• Authors: Wang, Tao; Zou, Ting; He, Zhiyuan; Yuan, Guoqiang; Luo, Tao; Zhu, Jun; Liang, Yueyang; Deng, Qiming; Wang, Shiquan; Zheng, Aiping; Liu, Huainian; Wang, Lingxia; Li, Ping; Li, Shuangcheng
• Is Part Of: Journal of integrative plant biology. Volume 61:Issue 10(2019)
• Page Start: 1036
• Page End: 1042
• Publication Date: 2019-01-16
• Subjects: Plants -- Periodicals; Plants -- China -- Periodicals; Electronic journals; 580.5
• DOI: 10.1111/jipb.12736
• Languages: English
• ISSNs: 1672-9072

Abstract

Summary: Grain size is an important factor determining yield in rice. Here, we identified a recessive mutant gene, grain length and awn 1 ( gla1 ), which caused a significant increase in grain length and weight, and was associated with long awns. The gla1 mutation was mapped to a single‐nucleotide polymorphism in a gene encoding a cytoplasmically‐localized mitogen‐activated protein kinase (MAPK) phosphatase. Overexpression of GLA1 caused a decrease in grain length, and the GLA1 protein interacted with OsMAPK6. These results suggest that GLA1 may serve as a negative regulator of the OsMAPKK4‐OsMAPK6 cascade, controlling grain size via the dephosphorylation of OsMAPK6. Abstract : Grain size is important for rice yield. Mitogen‐activated protein kinase (MAPK) signaling modules play key roles in grain size control. Herein, we report that a putative MAPK phosphatase (MKP), GRAIN LENGTH AND AWN 1 (GLA1), which interacts with OsMAPK6 and negatively regulates grain size in rice.