外生菌对植物光合日变化的通径分析——以樟子松为例
Path Analysis of Diurnal Variation of Photosynthesis in Plants with Ectomycorrhial Fungi-For Example Pinus sylvestris var.mongolica Litv.
申慧慧 1毕银丽 1王志刚 1赵新伟 1庄超然1
作者信息
- 1. 中国矿业大学(北京),煤炭资源与安全开采国家重点实验室,北京100083
- 折叠
摘要
[目的]揭示樟子松光合日变化特征及影响因子之间的作用关系.[方法]通过研究4年树龄的樟子松光合日变化特征,设置接种彩色豆马勃菌[Pisolithus tinctorius (Pers.) Coker & Couch](接菌组)和不接菌(对照组)2种处理,采用便携式光合测定仪测定樟子松08:00-18:00的净光合速率(Pn)及其参数,研究其光合日变化特征.[结果]对照组和接菌组的Pn日变化绘制的都是“双峰”曲线.对照组的Pn是0.89～6.67 μmol/(m2·s),接菌组的Pn是0.51～10.90 μmol/(m2·s),最小值均出现在18:00,最大值均出现在09:00.接菌组Pn的日均值显著大于对照组.影响Pn的环境因子存在共线关系.得到多元逐步线性回归方程,对照组:Pn=-120.96+63.083Cond-0.157Ta+8.06Ls +0.001PAR-0.05Ca+1.644RH(R2=82.9,F=161 279.83);接菌组:Pn=5 910.823 +92.104Cond-11.807Ta+ 12.622Ls-0.006PAR(R2 =0.92.7,F=2 045.23).通过通径分析得到对照组环境因子对Pn的通径系数(直接作用)的顺序是Cond＞ Ta＞ Ls＞ PAR＞ Ca＞ RH,间接通径系数(间接作用)的顺序是RH＞ PAR ＞Ta＞ Ca＞ Ls＞ Cond;接菌组环境因子对Pn的通径系数大小顺序是Cond＞ Ls＞ PAR＞ Ta;间接通径系数顺序是Ls＞ PAR＞ Cond＞ Ta.接菌组RH、Ca不是限制因子.[结论]试验结果为不同处理下影响Pn的主导因素研究提供了参考.
Abstract
[Objective] The aim was to reveal the relationship between diurnal variation of photosynthesis in Pinus sylvestris and impact factors.[Method] We used portable Pn instrument to determinate the net photosynthetic rate and its parameters of 4 years old Pinus sylvestris var.mongolica between 08:00 and 18:00,and studied the photosynthetic diurnal variation characteristics of natural group and inoculated with Pisolithus tinctorius group.[Result] The photosynthetic diurnal variation characteristics of the control group and the bacteria group were "bimodal curve".The Pn range of the control group was 0.89-6.67 μmol/(m2 · s),and the range of Pn was 0.51-10.90 μmol/(m2 · s);the minimum value appeared at 18:00,and the maximum value appeared at 09:00.There were collinear relationship of the environmental factors that effected Pn.Multiple linear regression equations for the control group was:Pn =-120.96 + 63.083Cond-0.157Ta + 8.06Ls + 0.001 PAR-0.05 Ca + 1.644RH (R2 =0.992,F =161 279.83),and the inoculated with Pisolithus tinctorius group was:Pn =5 910.823 + 92.104Cond-11.807Ta + 12.622Ls-0.006PAR(R2 =0.997,F =2 045.23).Through path analysis about the impact of environmental factors on net photosynthesis rate could get the order of path coefficient for the control group was Cond ＞ Ta ＞ Ls ＞ PAR ＞ Ca ＞ RH,and the order of indirect path coefficient was RH ＞ PAR ＞ Ta ＞ Ca ＞ Ls ＞ Cond;the order of path coefficient for the inoculated with Pisolithus tinctorius group was Cond ＞ Ls ＞ PAR ＞ Ta,and the order of indirect path coefficient was Ls ＞ PAR ＞ Cond ＞ Ta.The RH and Ca of Pisolithus tinctorius group were not limiting factors.[Conclusion] The results provide reference for study on dominant impact factor of Pn under different treatments.
关键词
樟子松/光合日变化/彩色豆马勃菌/多元线性回归/通径分析Key words
Pinus sylvestris var.mongolica Litv./Photosynthetic diurnal variation/Pisolithus tinctorius (Pers.) Coker & Couch/Multiple linear regression/Path analysis引用本文复制引用
出版年
2017
国家科技期刊平台
NSTL
维普
万方数据