Systemic regulation of sulfur homeostasis in Medicago truncatula

doi:10.1007/s00425-013-1958-1

	Systemic regulation of sulfur homeostasis in Medicago truncatula
	Gao, Yan 1; Tian, Qiuying ; Zhang, Wen-Hao
	2014
发表期刊	PLANTA
ISSN	0032-0935
卷号	239 期号:1 页码:79-96
摘要	Sulfur (S) is an essential macronutrient for plants, and deficiency in soil S availability limits plant growth. Adaptive strategies have been evolved by plants to respond to S deficiency by coordinating systemic regulatory mechanism. A split-root experiment using legume model plant Medicago truncatula Gaertn. was conducted to investigate the systemic response to S deficiency. Plant growth, root morphology and S contents under varying conditions of S supply were determined, and the expression of genes encoding sulfate transporter (MtSULTRs) and MtAPR1 encoding an enzyme involved in S assimilation was monitored. Our results demonstrated that there was an apparent systemic response of M. truncatula to heterogeneous S supply in terms of root length, S contents, and S uptake and assimilation at the transcriptional level. When exposed to heterogeneous S supply, M. truncatula plants showed proliferation of lateral roots in S-rich medium and reduction in investment to S-depleted roots. Growth was stimulated with half-part of roots exposed to S-deficient medium. There were different expression patterns of MtSULTRs and MtAPR1 in response to heterogeneous S supply both in roots and shoots of M. truncatula. Expression of MtSULTR1.1 and MtSULTR1.3 was systemically responsive to S deficiency, leading to an enhancement of S uptake in roots exposed to S-sufficient medium. In addition, the response of S-deprived seedlings to re-supply of sulfate and Cys was also analyzed. It was shown that sulfate, but not Cys, may serve as a systemic signal to regulate the expression of genes associated with S absorption and assimilation in M. truncatula. These findings provide a comprehensive picture of systemic responses to S deficiency in leguminous species.
关键词	Medicago Root morphology Split-root system Sulfur deficiency Sulfate transporters Systemic response
学科领域	Plant Sciences
DOI	10.1007/s00425-013-1958-1
收录类别	SCI
语种	英语
WOS关键词	AFFINITY SULFATE TRANSPORTERS ; ARABIDOPSIS-THALIANA ; ATP SULFURYLASE ; 5'-ADENYLYLSULFATE REDUCTASE ; PHOSPHATE STARVATION ; ROOT ARCHITECTURE ; EXPRESSION ; PLANTS ; ASSIMILATION ; RESPONSES
WOS研究方向	Plant Sciences
WOS记录号	WOS:000329240700006
出版者	SPRINGER
文献子类	Article
出版地	NEW YORK
EISSN	1432-2048
资助机构	Natural Science Foundation of China [31272234] ; State Key Laboratory of Vegetation and Environmental Change
作者邮箱	tianqiuying@ibcas.ac.cn ; whzhang@ibcas.ac.cn
引用统计	被引频次：12[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/2S10CLM1/27286
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Beijing Inst Life Sci, Res Network Global Change Biol, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Gao, Yan,Tian, Qiuying,Zhang, Wen-Hao. Systemic regulation of sulfur homeostasis in Medicago truncatula[J]. PLANTA,2014,239(1):79-96.
APA	Gao, Yan,Tian, Qiuying,&Zhang, Wen-Hao.(2014).Systemic regulation of sulfur homeostasis in Medicago truncatula.PLANTA,239(1),79-96.
MLA	Gao, Yan,et al."Systemic regulation of sulfur homeostasis in Medicago truncatula".PLANTA 239.1(2014):79-96.

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