[1]高苗琴,赵瑜琦,宗毓铮,等. 2025杨及其3种芽变红叶杨光合生理和生态适应性研究[J].西北林学院学报,2020,35(2):102-107.[doi:10.3969/j.issn.1001-7461.2020.02.14]
　GAO Miao-qin,ZHAO Yu-qi,ZONG Yu-zheng,et al. Photosynthetic Traits and Ecological Adaptability of Poplar 2025 and Its 3 Bud Sporting Color-leafed Cultivars[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2020,35(2):102-107.[doi:10.3969/j.issn.1001-7461.2020.02.14]
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 2025杨及其3种芽变红叶杨光合生理和生态适应性研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第35卷
期数:
2020年第2期
页码:
102-107
栏目:
出版日期:
2020-03-31

文章信息/Info

Title:
 Photosynthetic Traits and Ecological Adaptability of Poplar 2025 and Its 3 Bud Sporting Color-leafed Cultivars
文章编号:
1001-7461(2020)02-0102-06
作者:
 高苗琴1; 赵瑜琦1; 宗毓铮2; 王卫锋1*
 （1.山西农业大学 林学院，山西 太谷 030801；2.山西农业大学 农学院，山西 太谷 030801）
Author(s):
 GAO Miao-qin1; ZHAO Yu-qi1; ZONG Yu-zheng2; WANG Wei-feng1*
 (1.College of Forestry,Shanxi Agricultural University,Taigu 030801,Shanxi,China; 2.College of Agriculture,Shanxi Agricultural University,Taigu 030801,Shanxi,China)
关键词:
 ; 红叶杨; 光合特性; 干物质分配; 光合色素
Keywords:
 ; colored-leaf poplar;  photosynthetic trait;  dry-mass distribution;  photosynthetic pigment
分类号:
S792.11
DOI:
10.3969/j.issn.1001-7461.2020.02.14
文献标志码:
A
摘要:
 红叶杨系列品种是我国典型的彩叶乔木。为进一步明确红叶杨树在叶片光合生理及干物质分配的适应特征，以2025杨及其3个连续芽变品种中红杨、全红杨和金红杨的1年生扦插苗为试验材料，研究其在功能叶光合特性、器官间生物量分配等方面的种间差异。结果表明，随着对2025杨芽变的连续人工选择，其当年生长量显著降低，功能叶光合能力也呈降低趋势，但金红杨略高于全红杨；功能叶的瞬时水分利用效率（WUE）依次显著降低，中红杨和全红杨的光合氮利用效率（PNUE）显著低于2025杨，而金红杨的PNUE无显著差异。单叶面积、净光合速率、羧化速率（CE）及光合氮利用效率（PNUE）等指标显著降低可能是中红杨和全红杨生长量显著低于2025杨的原因，而非叶绿素含量。叶绿素a含量大幅度减少是金红杨功能叶光合能力低的重要原因。与2025杨相比，3种红叶杨的地上部干物质积累显著降低，叶器官分配比例逐渐增加而茎中干物质投资逐渐降低，这可能是对叶片光合能力降低的一种适应，但秋季落叶造成碳资源损失过大而对个体生长不利。
Abstract:
 Red leaf poplars are representatives of colored-leaf trees in China.In order to further clarify the adaptation characteristics on leaf photosynthetic physiology and dry-mass distribution of red leaf poplars,cuttings of “poplar 2025” (Populus deltoides ‘Lux (I-69/55)’×P.deltoides ‘Shanhaiguan’) and its bud varieties (P.deltoides ‘Zhonghong’,P.deltoides ‘Quanhong’ and P.deltoides ‘Jinhong’) were used as experiment materials,and the differences in the organ biomass distribution,functional leaf photosynthetic characteristics and photosynthetic pigments among these 4 varieties were investigated.The leaf photosynthetic capacity of 4 poplars was in the order of “2025”>“Zhonghong”>“Jinhong”>“Quanhong”,and the water use efficiency per leaf area unit decreased.Significant reductions appeared in single leaf area,net photosynthetic rate,carboxylation rate (CE),and photosynthetic nitrogen use efficiency (PNUE),which may account for the significant decline of photosynthesis in “Zhonghong” and “Quanhong” than “2025”,rather than the reduction of photosynthetic pigment content such as chlorophyll a.The significant decrease of chlorophyll a content in “Jinhong” may be an important reason for its lowest photosynthetic capacity.The dry-mass distributed to leaf organ of the 3 red leaf poplars increased gradually,which may be an adaptation to the decrease of photosynthesis ability of leaf,but a disadvantage of individual growth.

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备注/Memo

备注/Memo:
 收稿日期：2019-05-30修回日期：2019-12-02
基金项目：国家自然科学基金项目（31400527，31501276）；山西省应用基础研究项目（201701D221190）；山西农业大学引进人才项目（2013YJ18）；拔尖人才项目（BJRC201602）。
作者简介：高苗琴，女，硕士在读，研究方向：植物逆境生理生态。E-mail:gaomq1992@163.com
*通信作者：王卫锋，男，副教授，博士，研究方向：树木生理生态。E-mail:wangwf2020@163.com
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