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Ultrastructural, physiological and proteomic analysis of Nostoc flagelliforme in response to dehydration and rehydration

文献类型： 外文期刊

作者： Liang, Wenyu 2 ; Zhou, Youwen 2 ; Wang, Lingxia 1 ; You, Xiangrong 1 ; Zhang, Yaping 2 ; Cheng, Chi-Lien 3 ; Chen, Wei 1 ;

作者机构： 1.Fujian Agr & Forestry Univ, Sch Life Sci, Fuzhou 350002, Peoples R China

2.Ningxia Univ, Sch Life Sci, Yinchuan 750021, Peoples R China

3.Univ Iowa, Dept Biol, Iowa City, IA 52242 USA

4.Guangxi Acad Agr Sci, Nanning 530007, Peoples R China

关键词： 2-DE;Dehydration and rehydration;Differential proteins;Nostoc flagelliforme;Physiological characteristics;Ultrastructure

期刊名称：JOURNAL OF PROTEOMICS （ 影响因子：4.044； 五年影响因子：4.02 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Nostoc flagelliforme must undergo a dehydration/rehydration cycle during its growth stages; the mechanisms underlying this constraint are examined. The novel insights into N. flagelliforme's response to desiccation and rehydration at ultrastructural, physiological and proteomic levels were offered. The structure of colonies and cells remained unchanged in response to dehydration and rehydration treatments except that the sheath appeared shrunken, and both the quantity and volume of vacuoles were decreased when dehydrated compared with rehydration. A significant increase in photosynthesis, respiration, total Rubisco activity, superoxide anion level, SOD, CAT, POD, nitrogenase and glutamine synthetase (GS) activities in response to rehydration was noted, whereas H 2O 2, ammonium, proline and glutamate contents all registered a decrease. 32 differentially expressed proteins between dehydrated and rehydrated colonies were categorized according to their predicted functions into secretion, signaling, transcription and translation, antioxidative processes, nitrogen metabolism, energy metabolism, lipid metabolism and chaperonin. The dehydration is a quiescent state in which metabolism is down-regulated, upon rehydration, a metabolic shift occurs from quiescent to active. The specific metabolic and regulated mechanisms to accommodate the dehydration/rehydration cycle in N. flagelliforme is reported here.

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