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题名: Nitric Oxide Enhances Desiccation Tolerance of Recalcitrant Antiaris toxicaria Seeds via Protein S-Nitrosylation and Carbonylation
作者: Bai, Xuegui1; Yang, Liming3; Tian, Meihua1; Chen, Jinhui2; Shi, Jisen2; Yang Yongping(杨永平)1; null(胡向阳)1
刊名: PLOS ONE
关键词: HYDROGEN-PEROXIDE ; ABSCISIC-ACID ; DISEASE RESISTANCE ; HYDROXYL RADICALS ; OXIDATIVE STRESS ; STOMATAL CLOSURE ; ACTIVE OXYGEN ; CELL-WALLS ; ZEA-MAYS ; ARABIDOPSIS
英文摘要: The viability of recalcitrant seeds is lost following stress from either drying or freezing. Reactive oxygen species (ROS) resulting from uncontrolled metabolic activity are likely responsible for seed sensitivity to drying. Nitric oxide (NO) and the ascorbate-glutathione cycle can be used for the detoxification of ROS, but their roles in the seed response to desiccation remain poorly understood. Here, we report that desiccation induces rapid accumulation of H2O2, which blocks recalcitrant Antiaris toxicaria seed germination; however, pretreatment with NO increases the activity of antioxidant ascorbate-glutathione pathway enzymes and metabolites, diminishes H2O2 production and assuages the inhibitory effects of desiccation on seed germination. Desiccation increases the protein carbonylation levels and reduces protein S-nitrosylation of these antioxidant enzymes; these effects can be reversed with NO treatment. Antioxidant protein S-nitrosylation levels can be further increased by the application of S-nitrosoglutathione reductase inhibitors, which further enhances NO-induced seed germination rates after desiccation and reduces desiccation-induced H2O2 accumulation. These findings suggest that NO reinforces recalcitrant seed desiccation tolerance by regulating antioxidant enzyme activities to stabilize H2O2 accumulation at an appropriate concentration. During this process, protein carbonylation and S-nitrosylation patterns are used as a specific molecular switch to control antioxidant enzyme activities.
出版日期: 2011-06-02
卷号: 6, 期号:6, 页码:e20714
DOI标识: 10.1371/journal.pone.0020714
语种: 英语
收录类别: SCI
学科分类: Biology
ISSN号: 1932-6203
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/3832
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Tibet Plateau Res Kunming, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming, Peoples R China
2.Nanjing Forestry Univ, Minist Educ, Key Lab Forest Genet & Biotechnol, Nanjing, Peoples R China
3.Huaiyin Normal Univ, Sch Life Sci, Huaian, Peoples R China

Recommended Citation:
Bai, Xuegui; Yang, Liming; Tian, Meihua; Chen, Jinhui; Shi, Jisen; Yang, Yongping; Hu, Xiangyang.Nitric Oxide Enhances Desiccation Tolerance of Recalcitrant Antiaris toxicaria Seeds via Protein S-Nitrosylation and Carbonylation,PLOS ONE,2011,6(6):e20714
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