[1]纵丹,王静敏,张垚,等. 西南地区9种乡土杨树的秋季光合特性比较[J].西北林学院学报,2022,37(4):57-63.[doi:10.3969/j.issn.1001-7461.2022.04.08]
　ZONG Dan,WANG Jing-min,ZHANG Yao,et al. Comparison of Photosynthetic Characteristics of Nine Poplar Species in Southwest China in Autumn[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2022,37(4):57-63.[doi:10.3969/j.issn.1001-7461.2022.04.08]
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 西南地区9种乡土杨树的秋季光合特性比较()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第37卷
期数:
2022年第4期
页码:
57-63
栏目:
出版日期:
2022-07-31

文章信息/Info

Title:
 Comparison of Photosynthetic Characteristics of Nine Poplar Species in Southwest China in Autumn
文章编号:
1001-7461(2022)04-0057-07
作者:
 纵丹1; 2; 3; 王静敏1; 2; 张垚1; 2; 马东晓1; 2; 姜辅瑞1; 2; 张晓琳1; 2; 何承忠1; 2; 3*
 (1.西南林业大学 西南山地森林资源保育与利用教育部重点实验室，云南 昆明 650224; 2.西南林业大学 云南省高校林木遗传改良与繁育重点实验室，云南 昆明 650224; 3.西南林业大学 西南地区生物多样性保育国家林业和草原局重点实验室，云南 昆明 650224)
Author(s):
 ZONG Dan1; 2; 3; WANG Jing-min1; 2; ZHANG Yao1; 2; MA Dong-xiao1; 2; JIANG Fu-rui1; 2; ZHANG Xiao-lin1; 2; HE Cheng-zhong1; 2; 3*
 (1.Key Laboratory for Forestry Resources Conservation and Utilization in the Southwest Mountains of China,Ministry of Education/Southwest Forestry University,Kunming 650224,Yunnan,China; 2.Key Laboratory for Forest Genetic and Tree Improvement & Propagation in Universities of Yunnan Province,Southwest Forestry University,Kunming 650224,Yunnan,China)
关键词:
 ; 西南地区; 乡土杨树; 光合特性; 秋季
Keywords:
 ; southwest China;  native poplar species;  photosynthetic characteristics;  autumn
分类号:
S718.49
DOI:
10.3969/j.issn.1001-7461.2022.04.08
文献标志码:
A
摘要:
 季节是影响植物光合特性的重要因素之一，而树木秋季光合作用为次年生长储备营养物质，也是林木育种的重要指标。为了解西南地区9种乡土杨树在秋季生长期对光能的利用效率，以收集于西南地区不同海拔的滇杨、大叶杨、藏川杨、德钦杨、昌都杨、康定杨、乡城杨、西南杨和三脉青杨为研究对象，在10月初采用LI-6400便携式光合测定仪对其光合参数进行测定。结果表明：1）滇杨和藏川杨的生长量优于其他树种。2）乡城杨净光合速率（Pn）日变化呈现为不对称的双峰曲线，其他8种杨树均为单峰曲线，但峰值出现的时间不同；而9种杨树的蒸腾速率（Tr）日变化均为单峰曲线，大叶杨Tr峰值出现在12:00，其他8种杨树均在14:00；9种杨树的气孔导度（Gs）、胞间CO2浓度（Ci）和水分利用率（WUE）日均值均存在极显著差异，昌都杨Gs日均值最大（0.37 mmol·m-2·s-1），康定杨Ci日均值最小（284.222 4 μmol·mol-1），且水分利用率（WUE）最高（4.996 6 μmol·mmol-1）。3）综合4个光合参数，西南杨和康定杨具有较大的后续生长潜力，且康定杨耐旱性较强，而昌都杨和大叶杨耐旱能力较弱。因此，在今后推广应用及经营管理中，需要考虑不同树种对水分需求的差异。
Abstract:
 Season is one of important factors affecting the photosynthetic characteristics of the plants,and photosynthesis of trees in autumn reserves nutrients for the next year’s growth as well as an important index of tree breeding.In order to understand the light utilization efficiency of poplar species in southwest China during autumn,nine poplar species,which distribute at different altitudes in southwest China,including Populus yunnanensis,P.lasiocarpa,P.szechuanica var.tibetica,P.haoana,P.qamdoensis,P.kangdingensis,P.xiangchengensis,P.schneideri and P.trinervis,were used as the research materials,and the photosynthetic parameters were measured by LI-6400 portable photosynthesis measurement system in early October.The results showed that 1) the growth of P.yunnanensis and P.szechuanica var.tibetica was superior to other poplar species.2) The curve of net photosynthetic rate (Pn) of P.xiangchengensis was bimodal while those of other poplar species unimodal,but the peak value of Pn appeared at different time.The diurnal variation of transpiration rates (Tr) of nine poplar species were unimoal curves,and the maximum value of Tr in P.lasiocarpa occurred at 12:00,while other eight poplar species occurred at 14:00.The mean values of stomatal conductance (Gs),intercellular CO2 concentration (Ci) and water use efficiency (WUE) were all extremely and significantly different,and P.qamdoensis had the maximum mean value of Gs (0.37 mmol·m-2·s-1),P.kangdingensis had the minimum mean value of Ci (284.222 4 μmol·mol-1) and the maximum mean value of WUE (4.996 6 μmol·mmol-1).3) Comprehensive analysis of the photosynthetic parameters indicated that P.schneideri and P.kangdingensis should have great potential for subsequent growth.Meanwhile,P.kangdingensis has showed strong drought tolerance,but the drought tolerances of P.qamdoensis and P.lasiocarpa were weak.Therefore,attention should be paid to the differences in water demand among different poplar species during spreading application and management.

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备注/Memo

备注/Memo:
 收稿日期：2021-04-20修回日期：2021-08-11
基金项目：国家自然科学基金项目（31860219）；西南山地森林资源保育与利用教育部重点实验室开放基金项目（KLESWFU-201906）；云南省教育厅科学研究基金项目（2021J0177）。
第一作者：纵丹，讲师。研究方向：林木遗传育种。E-mail：zdkathy@163.com
*通信作者：何承忠，教授。研究方向：林木遗传育种与生物技术。E-mail:hcz70@163.com
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