粒长和芒 1 负调控水稻粒型。
GRAIN LENGTH AND AWN 1 negatively regulates grain size in rice.
机构信息
State Key Laboratory of Hybrid Rice, Sichuan Agricultural University, Chengdu 611130, China.
Rice Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang 611130, China.
出版信息
J Integr Plant Biol. 2019 Oct;61(10):1036-1042. doi: 10.1111/jipb.12736. Epub 2019 Jan 16.
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.
粒型是决定水稻产量的一个重要因素。在这里，我们鉴定了一个隐性突变体基因，粒长和芒 1（gla1），该基因导致粒长和粒重显著增加，并与长芒相关。gla1 突变被定位到一个编码细胞质定位的丝裂原活化蛋白激酶（MAPK）磷酸酶的基因中的单核苷酸多态性。GLA1 的过表达导致粒长减小，并且 GLA1 蛋白与 OsMAPK6 相互作用。这些结果表明，GLA1 可能作为 OsMAPKK4-OsMAPK6 级联的负调节剂，通过 OsMAPK6 的去磷酸化来控制粒型。
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