A rice small GTPase, Rab6a, is involved in the regulation of grain yield and iron nutrition in response to CO2 enrichment

doi:10.1093/jxb/eraa279

	A rice small GTPase, Rab6a, is involved in the regulation of grain yield and iron nutrition in response to CO2 enrichment
	Yang, An ; Li, Qian 1; Chen, Lei 2; Zhang, Wen-Hao
	2020
发表期刊	JOURNAL OF EXPERIMENTAL BOTANY
ISSN	0022-0957
卷号	71 期号:18 页码:5680-5688
摘要	Despite extensive studies on the effects of elevated atmospheric CO2 concentrations ([CO2]) on rice, the molecular mechanisms and signaling events underlying the adaptation of plants remain largely elusive. Here, we report that OsRab6a, which encodes a small GTPase, is involved in the regulation of rice growth, grain yield, and accumulation of iron (Fe) in response to elevated [CO2] (e[CO2]). We generated transgenic plants with OsRab6a-overexpression (-OE) together with OsRab6a-RNAi lines, and found no differences in growth and grain yield among them and wild-type (WT) plants under ambient [CO2] conditions. Under e[CO2] conditions, growth and grain yield of the WT and OsRab6a-OE plants were enhanced, with a greater effect being observed in the latter. In contrast, there were no effects of e[CO2] on growth and grain yield of the OsRab6a-RNAi plants. Photosynthetic rates in both the WT and OsRab6a-OE plants were stimulated by e[CO2], with the magnitude of the increase being higher in OsRab6a-OE plants. Fe concentrations in vegetative tissues and the grain of the WT and transgenic plants were reduced by e[CO2], and the magnitude of the decrease was lower in the OE plants than in the WT and RNAi plants. Genes associated with Fe acquisition in the OsRab6a-OE lines exhibited higher levels of expression than those in the WT and the RNAi lines under e[CO2]. Analysis of our data using Dunnett's multiple comparison test suggested that OsRab6a is an important molecular regulator that underlies the adaptation of rice to e[CO2] by controlling photosynthesis and Fe accumulation.
关键词	Elevated CO2 concentrations Fe acquisition grain Fe content Oryza sativa photosynthesis Rab6a small GTPase
学科领域	Plant Sciences
DOI	10.1093/jxb/eraa279
收录类别	SCI
语种	英语
WOS关键词	WHOLE-PLANT GROWTH ; ELEVATED CO2 ; TRANSCRIPTION FACTOR ; STARCH SYNTHESIS ; RUBISCO CONTENT ; CARBON-DIOXIDE ; PROTEIN ; GENES ; HOMEOSTASIS ; QUALITY
WOS研究方向	Plant Sciences
WOS记录号	WOS:000577073500032
出版者	OXFORD UNIV PRESS
文献子类	Article
出版地	OXFORD
EISSN	1460-2431
资助机构	National Key Research and Development Program of China [2016YFC0500706] ; Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31301832]
作者邮箱	whzhang@ibcas.ac.cn
作品OA属性	Green Published, hybrid
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/21561
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Northwest A&F Univ, Coll Hort, Yangling 712100, Shaanxi, Peoples R China 3.South China Normal Univ, Sch Life Sci, Guangdong Prov Key Lab Biotechnol Plant Dev, Guangzhou 510631, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yang, An,Li, Qian,Chen, Lei,et al. A rice small GTPase, Rab6a, is involved in the regulation of grain yield and iron nutrition in response to CO2 enrichment[J]. JOURNAL OF EXPERIMENTAL BOTANY,2020,71(18):5680-5688.
APA	Yang, An,Li, Qian,Chen, Lei,&Zhang, Wen-Hao.(2020).A rice small GTPase, Rab6a, is involved in the regulation of grain yield and iron nutrition in response to CO2 enrichment.JOURNAL OF EXPERIMENTAL BOTANY,71(18),5680-5688.
MLA	Yang, An,et al."A rice small GTPase, Rab6a, is involved in the regulation of grain yield and iron nutrition in response to CO2 enrichment".JOURNAL OF EXPERIMENTAL BOTANY 71.18(2020):5680-5688.

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