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Populus from high altitude has more efficient protective mechanisms under water stress than from low-altitude habitats: a study in greenhouse for cuttings

文献类型：期刊论文

作者Yin, CY; Pang, XY; Lei, YB; Yin, CY, Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China.
刊名PHYSIOLOGIA PLANTARUM
出版日期2009
卷号137期号:1页码:22_35
ISSN号0031-9317
产权排序1
英文摘要Cuttings of Populus przewalskii and P. cathayana, which originated from high and low altitudes in southwest China, were used to examine the effect of water stress on the morphological, physiological and biochemical traits of plants in a greenhouse for one growing season. The dry mass accumulation and allocation, gas exchanges, extent of peroxidation damage, osmotic adjustment and antioxidative defenses, and amounts of pigments were measured to characterize the differences in peroxidation damage and protective mechanisms of two poplar species that contrast in drought tolerance. Under water stress, poplars showed a series of biochemical adjustments and morphological changes as follows: a decrease in leaf relative water content, gas exchanges, plant growth and dry mass accumulation; an increase in relative allocation to roots; an increase in the osmolyte contents (e.g. total amino acids). Additionally, water deficit induced an increase in peroxidation damage [as indicated by an increase in electrolyte leakage, malondialdehyde (MDA), carbonyl (C = O ) and hydrogen peroxide (H2O2) content], enhanced activities or contents of antioxidants (e.g. ascorbate peroxidase, guaiacol peroxidase, glutathione redutase and ascorbic acid) and reduced amounts of leaf pigments (e.g. chlorophyll and carotenoid). Furthermore, there were significant differences in the extent of morphological and biochemical changes between the two poplar species. Compared with P. cathayana, P. przewalskii responded to water stress by allocating relatively more to root dry mass, possessing a higher net photosynthesis rate, and having more efficient protective mechanisms, such as more osmolyte accumulation, stronger antioxidant activities and lower chlorophyll/carotenoid ratio. Thus, P. przewalskii suffered less damage as deduced from lower levels of electrolyte leakage, MDA, C=O and H2O2 content. Therefore, P. przewalskii originating from high altitude could possess more efficient protective mechanisms than P. cathayana, which is from low-altitude habitats.
学科主题Plant Sciences
语种英语
资助机构National Natural Science Foundation of China [40701181, 30600472]; 'Knowledge Innovation Engineering' of the Chinese Academy of Sciences [KSCX2-SW-115]; National Science and Technology Infrastructure Program [2007BAD50B01] ; National Natural Science Foundation of China [40701181, 30600472]; 'Knowledge Innovation Engineering' of the Chinese Academy of Sciences [KSCX2-SW-115]; National Science and Technology Infrastructure Program [2007BAD50B01] ; National Natural Science Foundation of China [40701181, 30600472]; 'Knowledge Innovation Engineering' of the Chinese Academy of Sciences [KSCX2-SW-115]; National Science and Technology Infrastructure Program [2007BAD50B01] ; National Natural Science Foundation of China [40701181, 30600472]; 'Knowledge Innovation Engineering' of the Chinese Academy of Sciences [KSCX2-SW-115]; National Science and Technology Infrastructure Program [2007BAD50B01]
公开日期2011-07-08
源URL[http://210.75.237.14/handle/351003/22340]  
专题成都生物研究所_生态研究
通讯作者Yin, CY, Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China.
推荐引用方式
GB/T 7714		 Yin, CY,Pang, XY,Lei, YB,et al. Populus from high altitude has more efficient protective mechanisms under water stress than from low-altitude habitats: a study in greenhouse for cuttings[J]. PHYSIOLOGIA PLANTARUM,2009,137(1):22_35.
APA Yin, CY,Pang, XY,Lei, YB,&Yin, CY, Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China..(2009).Populus from high altitude has more efficient protective mechanisms under water stress than from low-altitude habitats: a study in greenhouse for cuttings.PHYSIOLOGIA PLANTARUM,137(1),22_35.
MLA Yin, CY,et al."Populus from high altitude has more efficient protective mechanisms under water stress than from low-altitude habitats: a study in greenhouse for cuttings".PHYSIOLOGIA PLANTARUM 137.1(2009):22_35.

入库方式： OAI收割

来源：成都生物研究所

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