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Characterization of a novel cyclase-like gene family involved in controlling stress tolerance in rice

文献类型： 外文期刊

作者： Qin, Yonghua 1 ; Shen, Xin 1 ; Wang, Nili 3 ; Ding, Xipeng 2 ;

作者机构： 1.South Cent Univ Nationalities, Coll Life Sci, Hubei Prov Key Lab Protect & Applicat Special Pla, Wuhan 430074, Peoples R China

2.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Key Lab Crop Gene Resources & Germplasm Enhanceme, Minist Agr, Danzhou 571737, Hainan, Peoples R China

3.Huazhong Agr Univ, Natl Key Lab Crop Genet Improvement, Wuhan 430070, Peoples R China

4.Huazhong Agr Univ, Natl Ctr Plant Gene Res Wuhan, Wuhan 430070, Peoples R China

关键词： Oryza sativa;Abiotic stress;CYL family;OsCYL4a;Stress

期刊名称：JOURNAL OF PLANT PHYSIOLOGY （ 影响因子：3.549； 五年影响因子：4.164 ）

ISSN：

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收录情况： SCI

摘要： A novel cyclase-like gene family (CYL) encodes proteins containing cyclase domain, but their functions are largely unknown. We report the systematic identification and characterization of CYL genes in the rice genome. Five putative CYL protein sequences (OsCYL1 to 4b) were identified. These sequences and other CYL homologs were classified into four subgroups based on phylogenetic analysis. Distinct diversification of these CYL proteins exists between plants and non-plants. The CYL family has conserved exon-intron structures, and the organizations of putative motifs in plants are specifically diverse. All OsCYL genes were expressed in a wide range of tissues or organs and were responsive to at least one of the abiotic stresses and hormone treatments applied. Protein OsCYL4a is targeted to the cell membrane. The overexpression of one stress-responsive gene OsCYL4a in rice resulted in decreased tolerance to salt, drought, cold, and oxidative stress. The expression levels of some abiotic stress-responsive factors, including H2O2-accumulating negative factors DST and OsSKIPa in OsCYL4a-overexpressing plants, were reduced compared with the wild type under normal condition and drought stress. These results suggest that rice CYL family may be functionally conserved polyketide cyclase, resulting in the rapid accumulation of reactive oxygen species to decrease tolerance to abiotic stresses. (C) 2015 Elsevier GmbH. All rights reserved.

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