气候变化领域集成服务门户(CCPortal): INTERMEDIUM-M encodes an HvAP2L-H5 ortholog and is required for inflorescence indeterminacy and spikelet determinacy in barley

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DOI	10.1073/pnas.2011779118
	INTERMEDIUM-M encodes an HvAP2L-H5 ortholog and is required for inflorescence indeterminacy and spikelet determinacy in barley
	Zhong J.; van Esse G.W.; Bi X.; Lan T.; Walla A.; Sang Q.; Franzen R.; von Korff M.
发表日期	2021
ISSN	00278424
卷号	118 期号:8
英文摘要	Inflorescence architecture dictates the number of flowers and, ultimately, seeds. The architectural discrepancies between two related cereals, barley and wheat, are controlled by differences in determinacy of inflorescence and spikelet meristems. Here, we characterize two allelic series of mutations named intermedium-m (int-m) and double seed1 (dub1) that convert barley indeterminate inflorescences into wheat-like determinate inflorescences bearing a multifloreted terminal spikelet and spikelets with additional florets. INT-M/DUB1 encodes an APETALA2-like transcription factor (HvAP2L-H5) that suppresses ectopic and precocious spikelet initiation signals and maintains meristem activity. HvAP2L-H5 inhibits the identity shift of an inflorescence meristem (IM) to a terminal spikelet meristem (TSM) in barley. Null mutations in AP2L-5 lead to fewer spikelets per inflorescence but extra florets per spikelet. In wheat, prolonged and elevated AP2L-A5 activity in rAP2L-A5 mutants delays but does not suppress the IM−TSM transition. We hypothesize that the regulation of AP2L-5 orthologs and downstream genes contributes to the different inflorescence determinacy in barley and wheat. We show that AP2L-5 proteins are evolutionarily conserved in grasses, promote IM activity, and restrict floret number per spikelet. This study provides insights into the regulation of spikelet and floret number, and hence grain yield in barley and wheat. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	APETALA2/Q; Barley and wheat; Inflorescence determinacy; MADS1; MADS3/58
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180518
作者单位	Institute for Plant Genetics, Heinrich-Heine University, Universitätsstraße 1, Düsseldorf, D-40225, Germany; Department of Plant Developmental Biology, Max Planck Institute for Plant Breeding Research, Carl-von-Linne-Weg 10, Cologne, D-50829, Germany; Cluster of Excellence on Plant Sciences, “SMART Plants for Tomorrow’s Needs”, Heinrich-Heine University, Universitätsstraße 1, Düsseldorf, D-40225, Germany; Laboratory of Molecular Biology, Wageningen University, Wageningen, 6708 PB, Netherlands
推荐引用方式 GB/T 7714	Zhong J.,van Esse G.W.,Bi X.,et al. INTERMEDIUM-M encodes an HvAP2L-H5 ortholog and is required for inflorescence indeterminacy and spikelet determinacy in barley[J],2021,118(8).
APA	Zhong J..,van Esse G.W..,Bi X..,Lan T..,Walla A..,...&von Korff M..(2021).INTERMEDIUM-M encodes an HvAP2L-H5 ortholog and is required for inflorescence indeterminacy and spikelet determinacy in barley.Proceedings of the National Academy of Sciences of the United States of America,118(8).
MLA	Zhong J.,et al."INTERMEDIUM-M encodes an HvAP2L-H5 ortholog and is required for inflorescence indeterminacy and spikelet determinacy in barley".Proceedings of the National Academy of Sciences of the United States of America 118.8(2021).