[1]冯雪瑾,刘勇*,李晓丽,等. 楸树叶片年龄与位置效应的生理指标变化研究[J].西北林学院学报,2021,36(5):51-56.[doi:10.3969/j.issn.1001-7461.2021.05.07]
　FENG Xue-jin,LIU Yong*,LI Xiao-li,et al. Changes of Physiological Indexes of the Leaves Collected from Catalpa bungei Trees with Different Ages and Crown Locations[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2021,36(5):51-56.[doi:10.3969/j.issn.1001-7461.2021.05.07]
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 楸树叶片年龄与位置效应的生理指标变化研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第36卷
期数:
2021年第5期
页码:
51-56
栏目:
出版日期:
2021-09-30

文章信息/Info

Title:
 Changes of Physiological Indexes of the Leaves Collected from Catalpa bungei Trees with Different Ages and Crown Locations
文章编号:
1001-7461(2021)05-0051-06
作者:
 冯雪瑾1; 刘勇1*; 李晓丽1; 邢立霞2; 贺国鑫2; 薛敦孟2
 （1.北京林业大学 林学院，省部共建森林培育与保护教育部重点实验室，北京 100083；2.北京市大东流苗圃，北京 100000）
Author(s):
 FENG Xue-jin1; LIU Yong1*; LI Xiao-li1; XING Li-xia2; HE Guo-xin2; XUE Dun-meng2
 (1.School of Forestry,Beijing Forestry University/Key Laboratory for Silviculture and Conservation,Ministry of Education,Beijing 100083,China; 2.Beijing Dadongliu Nursery,Beijing 100000,China)
关键词:
 ; 楸树; 年龄效应; 位置效应; 生理指标
Keywords:
Catalpa bungei;  age effect;  position effect;  physiological index
分类号:
S792.99
DOI:
10.3969/j.issn.1001-7461.2021.05.07
文献标志码:
A
摘要:
 为探究楸树生长过程中生理指标的变化规律，选择古楸树无性繁殖材料，对不同年龄及部位的楸树叶片中超氧化物歧化酶（SOD）活性、过氧化物酶（POD）活性、可溶性糖含量、可溶性蛋白含量及叶绿素含量进行了测定。结果表明：1）叶绿素、可溶性蛋白及可溶性糖含量随楸树年龄增加呈现不断减少的趋势，SOD活性及POD活性随年龄增加不断上升。300年生冠部较3年生冠部叶绿素减少了23.89%，可溶性蛋白减少了72.81%，可溶性糖减少了58.71%，SOD活性增加了26.82%，POD活性增加了139.69% 。2）位置效应方面，根萌条叶片叶绿素、可溶性糖及POD活性低于冠部叶片，而SOD活性和可溶性蛋白则高于冠部。其中，叶绿素在300年生叶片根、冠部差异最大，冠部是根部的1.99倍；可溶性蛋白、可溶性糖含量和SOD活性均在3年生楸树叶片根、冠部差异最大，根部较冠部分别增加了12.11%、21.28%、28.51%。POD活性则在15年生处差异最大，冠部是根部的1.71倍。综上所述，300年生楸树叶片抗性较高，且具有明晰的遗传背景，是培育优良楸树较佳的无性繁殖材料。根部枝条相对于冠部枝条生理年龄较小，且300年生根部和冠部叶片可溶性蛋白和SOD含量没有显著差异，根部枝条是无性繁殖材料选择的较佳位置。
Abstract:
 In order to explore the changes of physiological indexes during the growth process of Catalpa bungei,and to select materials for clonal propagation of this species,the leaves of C.bungei with different ages and grown in different crown locations were collected to measure the relative indices,such as superoxide dismutase (SOD) activity,peroxidase (POD) activity,soluble sugar content,soluble protein content and chlorophyll content.The results showed that 1) the contents of chlorophyll,soluble protein and soluble sugar showed decreasing trends with the tree age,while the SOD activity and POD activity increased with the tree age.Compared with the crown leaves of 3-year-old tree,the chlorophyll content,the soluble protein,and the soluble sugar decreased of the 300-year-old tree by 23.89%,72.81%,and 58.71%,respectively,while the SOD activity and POD activity increased by 26.82% and 139.69%,respectively.2) In view of the effect of leaf growing positions,the contents of chlorophyll,soluble sugar,and POD activity of the leaves collected from the upper crown were higher than those from the low crown,while the SOD activity and soluble protein content of the leaves collected from the low crown were higher than those from upper crown.The differences in chlorophyll content between the upper and low crown were the most significant in 300-year-old trees,the content of chlorophyll in upper crown leaves were 1.99 times higher than low crown leaves.The differences in soluble protein content and soluble sugar,as well as the SOD activity were the most significant between the low and upper crown of the trees with the age of 3 years old,in which the soluble protein,soluble sugar content and SOD activity of the leaves in low crown increased by 12.11%,21.28%,and 28.51%,respectively,compared to the upper crown.For the trees with the age of 15 years old,the difference in POD activity was the most significant,it was 1.71 times higher in upper crown than in low crown.In conclusion,the trees with the age of 300 years old presented higher resistance and clear genetic background,which can be a better material for clonal propagation to cultivate excellent C.bungei clones.On the other hand,the physiological age of the branches in low crown was relatively small compared with those in upper crown branches,and there were no significant differences in the soluble protein and POD activity between the upper and low crown,the branches in low crown would be the best clonal propagation materials.

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备注/Memo

备注/Memo:
 收稿日期：2020-09-07修回日期：2021-03-15
基金项目：北京市园林绿化增彩延绿科技创新工程科研项目（CEG-2016-01）。
作者简介：冯雪瑾。研究方向：森林培育。E-mail：fxj19960323@126.com
*通信作者：刘勇，博士，教授，博士生导师。研究方向：森林培育。E-mail：lyong@bjfu.edu.cn
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