A G-protein pathway determines grain size in rice
Date:2021-08-24 clicks:
Impact Factor:12.14
DOI number:10.1038/s41467-018-03141-y
Journal:Nat Commun
Key Words:G Protein，Grain size
Abstract:Manipulating grain size is an effective strategy for increasing cereal yields. Here we identify a pathway composed of five subunits of the heterotrimeric G proteins that regulate grain length in rice. The Gbeta protein is essential for plant survival and growth. Galpha provides a foundation for grain size expansion. Three Ggamma proteins, DEP1, GGC2 and GS3, antagonistically regulate grain size. DEP1 and GGC2, individually or in combination, increase grain length when in complex with Gbeta. GS3, having no effect on grain size by itself, reduces grain length by competitively interacting with Gbeta. By combining different G-protein variants, we can decrease grain length by up to 35% or increase it by up to 19%, which leads to over 40% decreasing to 28% increasing of grain weight. The wide existence of such a conserved system among angiosperms suggests a possible general predictable approach to manipulating grain/organ sizes.
Indexed by:SCI、
Discipline:Agricultural science
Document Type:SCI
Volume:9
Issue:1
Page Number:851
Translation or Not:no
Date of Publication:2018-03-01
Included Journals:SCI
