干旱区生态环境知识资源中心(Arid): The Clock Gene TOC1 in Shoots, Not Roots, Determines Fitness of Nicotiana attenuata under Drought

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DOI	10.1104/pp.19.00286
	The Clock Gene TOC1 in Shoots, Not Roots, Determines Fitness of Nicotiana attenuata under Drought
	Valim, Henrique F.1; McGale, Erica 1; Yon, Felipe 1,2; Halitschke, Rayko 1; Fragoso, Variluska 1,3,6; Schuman, Meredith C.1,4,5; Baldwin, Ian T.1
通讯作者	Schuman, Meredith C.
来源期刊	PLANT PHYSIOLOGY
ISSN	0032-0889
EISSN	1532-2548
出版年	2019
卷号	181 期号:1 页码:305-318
英文摘要	The highly conserved core circadian clock component TIMING OF CAB EXPRESSION1 (TOC1) contextualizes environmental stress responses in plants, for example by gating abscisic acid signaling and suppressing thermoresponsive growth. Selective interaction of TOC1 with PHYTOCHROME B under far-red-enriched light suggests a connection between circadian gating of light responses and sensitivity to ABA, an important regulator of growth and stress responses, including under drought. However, the fitness consequences of TOC1 function, particularly in the root, are poorly understood. Here, we used the desert annual, Nicotiana attenuata, to investigate the function of TOC1 in shoots and roots for maintaining fitness under drought, in both field and glasshouse experiments. Despite marked decreases in leaf water loss, TOC1-deficient lines failed to maintain fitness in response to drought stress as measured by total seed capsule production. Restoring TOC1 transcript levels in shoots via micrografting was sufficient to restore wild-type drought responses under field conditions. Microarrays identified a coexpression module in leaves strongly linking red and far-red light signaling to drought responses in a TOC1-dependent manner, but experiments with phytochrome-deficient lines revealed that the effects of TOC1 deficiency under drought cannot be attributed to changes in red/far-red light perception alone. Taken together, these results elucidate the sophisticated, tissue-dependent role of the circadian clock in maintaining fitness in the face of long-term abiotic stresses such as drought.
类型	Article
语种	英语
国家	Germany ; Peru ; Brazil ; Switzerland
开放获取类型	Bronze, Green Published
收录类别	SCI-E
WOS记录号	WOS:000483941300027
WOS关键词	AGROBACTERIUM-MEDIATED TRANSFORMATION ; CIRCADIAN CLOCK ; ABSCISIC-ACID ; BLUE-LIGHT ; PLANT ; RESPONSES ; PHYTOCHROMES ; EXPRESSION ; RHYTHMS ; TRANSCRIPTOME
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218045
作者单位	1.Max Planck Inst Chem Ecol, Dept Mol Ecol, D-07745 Jena, Germany; 2.Ctr Invest Cient Ecol Acad, Campus Santa Maria del Mar, Lima 37, Peru; 3.Univ Sao Paulo, Inst Chem, Res Support Ctr Mol Divers Nat Prod, BR-05508000 Sao Paulo, SP, Brazil; 4.German Ctr Integrat Biodivers Res iDiv, D-04103 Leipzig, Germany; 5.Univ Zurich, Dept Geog, CH-8057 Zurich, Switzerland; 6.Univ Sao Paulo, Inst Quim, BR-05508000 Sao Paulo, Brazil
推荐引用方式 GB/T 7714	Valim, Henrique F.,McGale, Erica,Yon, Felipe,et al. The Clock Gene TOC1 in Shoots, Not Roots, Determines Fitness of Nicotiana attenuata under Drought[J],2019,181(1):305-318.
APA	Valim, Henrique F..,McGale, Erica.,Yon, Felipe.,Halitschke, Rayko.,Fragoso, Variluska.,...&Baldwin, Ian T..(2019).The Clock Gene TOC1 in Shoots, Not Roots, Determines Fitness of Nicotiana attenuata under Drought.PLANT PHYSIOLOGY,181(1),305-318.
MLA	Valim, Henrique F.,et al."The Clock Gene TOC1 in Shoots, Not Roots, Determines Fitness of Nicotiana attenuata under Drought".PLANT PHYSIOLOGY 181.1(2019):305-318.