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题名: Proteomic profiling and redox status alteration of recalcitrant tea (Camellia sinensis) seed in response to desiccation
作者: Chen, Qi1, 2; Yang, Liming1, 3; Ahmad, Parvaiz4; Wan, Xiaochun2; null(胡向阳)1
刊名: PLANTA
关键词: Camellia ; Desiccation ; Proteomic ; Reactive oxygen species ; Recalcitrant seeds
英文摘要: Tea seed is believed to be recalcitrant based on its sensitivity to chilling or drying stress. Reactive oxygen species (ROS) and alterations in cytosolic redox status have been implicated in intolerance to desiccation by recalcitrant seed, but there is little information available regarding how ROS are regulated in seeds susceptible to drying stress. We investigated changes in protein expression and activity in tea embryo in response to desiccation using physiological and proteomic methods. Results showed that desiccation treatment dramatically induced the accumulation of H2O2 in tea embryos, accompanied by increased activities of antioxidant enzymes like ascorbate peroxidase (APX) and superoxide dismutase (SOD). Proteomic analyses also demonstrated that 23 proteins associated with defense response, metabolism and redox status were up-regulated following desiccation. Increase in antioxidants, ascorbic acid (AsA) and catalase (CAT) (H2O2 scavengers) partially assuaged desiccation damage to tea seed, resulting in improved germination rates. Higher accumulation of H2O2 aggravated desiccation damage to seeds leading to lower germination activity. We propose that desiccation causes an over-accumulation of ROS that are not efficiently scavenged by increased levels of antioxidant enzymes. High levels of ROS alter the redox status and are detrimental to seed viability. Reducing ROS to appropriate concentrations is an efficient way to reduce desiccation damage and improve germination rates of recalcitrant seeds.
出版日期: 2011-03-01
卷号: 233, 期号:3, 页码:583-592
DOI标识: 10.1007/s00425-010-1322-7
语种: 英语
ISSN号: 0032-0935
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内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/3834
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, Key Lab Biodivers & Biogeog, Kunming Inst Bot, Inst Tibet Plateau Res Kunming, Kunming 650204, Peoples R China
2.Anhui Agr Univ, Key Lab Tea Biochem & Biotechnol, Hefei 230036, Anhui, Peoples R China
3.Huaiyin Normal Univ, Sch Life Sci, Huaiyin 223300, Peoples R China
4.Univ Kashmir, AS Coll, Dept Bot, Srinagar 190008, Jammu & Kashmir, India

Recommended Citation:
Chen, Qi; Yang, Liming; Ahmad, Parvaiz; Wan, Xiaochun; Hu, Xiangyang.Proteomic profiling and redox status alteration of recalcitrant tea (Camellia sinensis) seed in response to desiccation,PLANTA,2011,233(3):583-592
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