干旱区生态环境知识资源中心(Arid): 高温胁迫对不同种源希蒙得木叶片生理特性的影响

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	高温胁迫对不同种源希蒙得木叶片生理特性的影响
其他题名	Effects of high-temperature stress on physiological characteristics of leaves of Simmondsia Chinensis seedlings from different provenances
	黄澂澂 1; 张念念 1; 胡庭兴 1; 李晓清 2; 何远洋 1; 尹丽 1
来源期刊	生态学报
ISSN	1000-0933
出版年	2011
卷号	31 期号:23 页码:7047-7055
中文摘要	利用人工气候室模拟高温环境，研究了不同程度高温处理对3个不同种源（Z_1：会东可河；Z_2:澳大利亚肯多伯冷；Z_3：美国菲尼克斯）希蒙得木叶片相对含水量（LRWC）、叶片光合特性、渗透调节、抗氧化保护酶、膜脂过氧化的影响。结果表明，3个种源希蒙得木幼苗LRWC、净光合速率（Pn)和蒸腾速率（Tr）均随高温胁迫强度的加剧呈极显著下降趋势，叶绿素含量（Chl)、可溶性糖含量显著降低；脯氨酸（Pro）含量呈极显著上升趋势；丙二醛（MDA）含量和相对电导率（REC）均随高温胁迫强度的加剧而显著增加；高温胁迫对希蒙得木幼苗叶片过氧化物酶(POD)活性和超氧化物歧化酶(SOD)活性的影响因种源不同而有所差异，Z_1/Z_2的POD活性随高温胁迫程度的增加而持续上升，Z_2的POD活性呈先上升后降低趋势；Z_1/Z_3的SOD活性随高温胁迫程度的增加而持续上升，Z_2的SOD活性呈先降低后上升趋势。以隶属函数法综合分析各种源希蒙得木幼苗抗高温能力的结果表明，3个种源希蒙得木幼苗的抗高温能力由强到弱依次为：Z_1/Z_3和Z_2。结果表明，长期生长在金沙江干热河谷的Z_1可能已经适应当地的生态环境，表现出较好的抵御高温的能力，不同种源耐高温能力的差异可能是通过种源所在地的气候、土壤、海拔等因子综合作用，经过漫长的系统发育，产生不同的变异结果。
英文摘要	Using phytotron to simulate high temperature environment, the physiological characteristics of leaves of Simmondsia chinensis seedlings from different provenances (Z_1: kehe in China, Z_2: Condobolin in Australia, Z_3: Phoenix in USA) under different degree of high-temperature stress (CK, T_1,T_2) have been studied. The results showed that with the increase of temperature, the leaf relative water content(LRWC), net photosynthetic rate(Pn), transpiration rate (Tr), chlorophyll (Chl) content, and sugar content decreased significantly. While the contents of praline (Pro), malondialdehyde (MDA), and relative conductivity (REC) increased significantly, with the enhancement of temperature stress. However, the effects of high-temperature stress on peroxidase (POD) and superoxide dismutase (SOD) activities were not consistent among different provenances. POD activities of Z_1 and Z_2 increased with the increase of temperature stress intensity, while that of Z_3 first increased and then decreased. SOD activities of Z_1 and Z_3 increased with the increase of temperature stress intensity, however that of Z_2 first decreased and then increased. The photosynthesis mechanisms of S. chinensis were different under diverse high-temperature stress. In high-temperature environment (T_1), a part of plant stomata closed to reduce the water loss and maintain normal physiological functions. Extreme heat- enviroment(T_2) broke the systems of ros generation and elimination, and further led ros abundantly accumulating, light oxidation, mda aggravation, plant cell dehydration, chl contents reduction, and the damage of photosynthetic organization. All of these changes brought about by high-temperature stress induced the decrease of Pn of S. chinensis greatly. Comprehensive evaluation of high-temperature resistance of S. chinensis seedlings of three provenances was conducted using fuzzy subordination method. The order of high-temperature resistance ability (from strong to weak) was Kehe in China (Z_1), Phoenix in USA (Z_3), and Condobolin in Australia (Z_2). The results suggest that Z_1 can adapt to the ecological environment of the arid-hot valley of Jinsha River. Z_1 has a better capacity of high-temperature resistance after breeding and cultivation for decades. The reasons that different provenances have diverse high-temperature resistance abilities may be the combined impact of environmental factors on plant, and the adaptation of plant to environment in the long-term of evolution. In short, S. chinensis has a good capability of high-temperature resistance and can be cultivated in extremely hot and dry area. Among the three provenances in the present study, Z_1 has a better ability to adapt to a high-temperature environment, such as the region of Jinssa River valley.
中文关键词	希蒙得木 ; 高温胁迫 ; 种源 ; 光合 ; 生理特性
英文关键词	Simmondsia chinensis high-temperature stress provenance photosynthetic characteristics physiological characteristics
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:4389319
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226981
作者单位	1.四川农业大学林学院, 四川省林业生态工程重点实验室, 雅安, 四川 625014, 中国; 2.四川省林业科学研究院, 成都, 四川 610081, 中国
推荐引用方式 GB/T 7714	黄澂澂,张念念,胡庭兴,等. 高温胁迫对不同种源希蒙得木叶片生理特性的影响[J],2011,31(23):7047-7055.
APA	黄澂澂,张念念,胡庭兴,李晓清,何远洋,&尹丽.(2011).高温胁迫对不同种源希蒙得木叶片生理特性的影响.生态学报,31(23),7047-7055.
MLA	黄澂澂,et al."高温胁迫对不同种源希蒙得木叶片生理特性的影响".生态学报 31.23(2011):7047-7055.