干旱区生态环境知识资源中心(Arid): 毛白杨杂种无性系叶片delta~(13)C差异与气体交换参数

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	毛白杨杂种无性系叶片delta~(13)C差异与气体交换参数
其他题名	Difference in delta~(13)C and gas exchange parameters among Populus tomentosa clones
	何茜 1; 李吉跃 1; 沈应柏 2; 陈晓阳 1; 尚富华 3; 胡磊 3; 张志毅 2
来源期刊	植物生态学报
ISSN	1005-264X
出版年	2010
卷号	34 期号:2 页码:144-150
中文摘要	在苗木生长的不同时期对13个毛白杨(Populus tomentosa)杂种无性系叶片碳同位素delta~(13)c和气体交换参数(净光合速率P_n、蒸腾速率T_r、瞬时水分利用效率WUE_I、气孔导度G_s和胞间CO_2浓度C_I)的差异进行研究,分析不同无性系间delta~(13)C与气体交换参数的相互关系,目的在于探求delta~(13)C在筛选高光合及高水分利用效率毛向杨杂种无性系中的应用价值.结果表明:不同生长时期和小同无性系问delta~(13)>C、T_r、WUE_I、G_s和G_I的差异均显著,delta~(13)C和WUE_I表现为9月>7月,T_r、G_s和C_I表现为7月>9月,P_n在不同生长时期差异不显著.季节变化是引起毛白杨杂种无性系叶片delta~(13)C差异的主要原因.同一时期,无性系间delta~(13)C和WUE_I表现出较好的一致性,即WUEi较高的无性系30、42、46、83、BL2和BL5,其delta~(13)C值也较高,WUEi较低的无性系B331和TG34,其delta~(13)C值也较低,且不同时期(7月和9月)delta~(13)C和WUE_I呈较强的正相关,相关系数r分别为0.739 0和0.545 8,高delta~(13)C可以作为筛选高WUE_I毛白杨的有效指标,且在苗木生长旺盛时期选育能得到更为可靠的结果.对毛白杨而言,高WUEi的无性系,一般具有适中或较低的G_s和G_I,但不一定具有很高的P_n,气孔调节使得毛白杨在不影响光合作用的同时保持较高的WUE.
英文摘要	Aims Fast, efficient breeding of fast-growth and high water use efficiency (WUE)in Populus tomentosa clones is a pressing need for afforestation in arid and semi-arid regions. There is much research on the correlation be-tween stable carbon isotope and WUE in crops and a few trees, but little in different clones of P. tomentosa. Our objective was to explore the application of delta~(13)C on selection of clones with high photosynthesis and WUE.Methods We examined 13 clones of Populus-grafted seedlings in Beijing Forestry University (39°46’ N, 116°19’E)Nursery in Beijing, China. We studied leaf delta~(13)C of the seedlings by MAT-251-MS in two different growth pe-riods (mid-July and September)and gas exchange parameters (net photosynthetic rate (P_n), transpiration rate (T_r),instantaneous water use efficiency (WUE_i), stomatal conductance (G_s)and intercellular CO_2 concentration (C_i))by LI-6400 portable photosynthesis system between 9:30 and 11:30 a.m. in the same periods. Important findings Leafdelta~(13)C, T_r, WUE_i, G_s and C_i significantly differed between the periods and among clones. Leaf delta~(13)C and WUE_i were higher in July than September; however, T_r, G_s and C_i were lower in July than Septem-ber and Pn showed no significant difference between periods. The main reason for the difference of leaf delta~(13)C was seasonal variation. Leaf delta~(13)C and WUEi of the clones were consistent during the same period, i.e, the higher WUE_i appeared in clones of 30, 42, 46, 83, BL2 and BL5 with higher delta~(13)C and the lower WUE_i occurred in clones of B331 and TG34 with lower delta~(13)C. There was strong positive correlation between delta~(13)C and WUE_i (r = 0.739 0 and 0.545 8 in July and September, respectively); therefore, high delta~13C can be used as an effective indicator of high WUE_i in Populus. Clones with higher WUE_i may have moderate or low G_s and C_i, but not necessarily high P_n.
中文关键词	无性系 ; 气体变换参数 ; 毛白杨 ; 水分利用效率
英文关键词	delta~(13)C delta~(13)C clones gas exchange parameters Populus tomentosa water use efficiency
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:3815709
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225891
作者单位	1.华南农业大学林学院, 广州, 广东 510642, 中国; 2.北京林业大学, 林木花卉遗传与育种教育部重点实验室, 北京 100083, 中国; 3.北京林业大学, 省部共建森林培育与保护教育部重点实验室, 北京 100083, 中国
推荐引用方式 GB/T 7714	何茜,李吉跃,沈应柏,等. 毛白杨杂种无性系叶片delta~(13)C差异与气体交换参数[J]. 北京林业大学,2010,34(2):144-150.
APA	何茜.,李吉跃.,沈应柏.,陈晓阳.,尚富华.,...&张志毅.(2010).毛白杨杂种无性系叶片delta~(13)C差异与气体交换参数.植物生态学报,34(2),144-150.
MLA	何茜,et al."毛白杨杂种无性系叶片delta~(13)C差异与气体交换参数".植物生态学报 34.2(2010):144-150.