河北杨与沙棘的光合生理特性及叶绿素荧光参数比较  

Comparisons on photosynthetic physiological characteristics and chlorophyll fl uorescence parameters between Populus hopeiensis and Hippophae rhamnoides

作　　者：朱亚红[1] 孙存举[2] 朱铭强[3] 孙权[1,4,5] 李兴财[4] 

机构地区：[1]宁夏大学农学院,宁夏银川750021 [2]四川省林业调查规划院,四川成都610081 [3]西北农林科技大学林学院,陕西杨陵712100 [4]宁夏大学物电学院,宁夏银川750021 [5]西北退化生态系统恢复重建教育部重点实验室,宁夏银川750021

出　　处：《中南林业科技大学学报》2015年第2期26-31,共6页Journal of Central South University of Forestry & Technology

基　　金：中国青少年科技创新奖励基金支持项目"小平科技创新团队";陕西省日元贷款项目(K332020023);中日国际合作项目(K332021321);宁夏回族自治区科技支撑计划宁陕合作项目:"沙漠边缘地表植被的环境胁迫防护及其旱作恢复技术研究"

摘　　要：河北杨Populus hopeiensis和沙棘Hippophae rhamnoides为黄土丘陵区主要的造林树种,其对生态恢复和保护具有重要作用。为比较两种树种的光合生理生态适应性,分别以吴起县人工栽培林内的河北杨和沙棘为研究对象,测定了两树种的叶片光响应曲线、蒸腾速率Tr、水分利用效率RWUE和叶绿素荧光参数等光合生理指标季节动态变化。结果表明:除5月下旬外,沙棘的最大光化学效率Fv/Fm在不同生育期均显著高于河北杨(P<0.05);沙棘在5月下旬、8月上旬和9月中旬的光合电子传递量子效率ΦPSII均显著高于河北杨(P<0.05);且不同生育期下沙棘的光化学猝灭qP和非光化学猝灭qNPQ均显著高于河北杨(P<0.05),表明沙棘具有相对较高的PSII光化学效率和较强的光保护能力。河北杨和沙棘在整个生育期均具有较高的LSP,且不同生育期下河北杨的RAQE,Pmax,Tr和Rd均显著高于沙棘,但LCP与之相反(P<0.05),表明两者均属典型阳性植物且能较适应当地的强光环境,而河北杨相对于沙棘具有较高的叶片光合能力。In loess hilly-gully region, Populus hopeiensis and Hippophae rhamnoide are the main afforestation tree species which played important roles in ecological restoration and protection. To compare the photosynthesis and physiological adaptability P. hopeiensis and H. rhamnoide, by taking the two tree species grew in the artificial forest in Wuqi County, Shaanxi Province as the tested materials, the seasonal changes of photosynthetic physiological indexes of the two tree sppecies, such as the leaf light response curves, transpiration efficiency Tr, water use efficiency RWUE and chlorophyll fluorescence characteristics etc., were investigated. The results indicate that the maximum photochemical efficiency Fv/Fm of H. rhamnoide were significantly higher than P. hopeiensis in different growth periods except in late May（P 0.05）, the photosynthetic electron transport quantum efficiency ΦPSII of H. rhamnoide in late May, early August and mid September were significantly higher than that of P. hopeiensis（P 0.05）, and the photochemical quenching value qP and Non photochemical quenching value qNPQ of H. rhamnoide were significantly higher than that of P. hopeiensis under different growth periods（P 0.05）, this indicated that H. rhamnoide had relatively higher photo-systems II photo-chemical efficiency and stronger light protection ability. Both species of P. hopeiensis and H. rhamnoide had higher values of LSP, and the apparent quantum yield RAQE, Pmax, Tr and Rd, of P. hopeiensis were significantly higher than H. rhamnoide under different growth periods, but the opposite trends were occurred in the LCP（P 0.05）. The findings suggested that both species were the typical light-demanding plants and can adapt to the higher light environment, which indicated that the photosynthetic capacity of P. hopeiensis was relatively higher than that of H. rhamnoide.

关 键 词：河北杨 沙棘 光合生理特性 叶绿素荧光参数 比较研究 

分 类 号：S793.6[农业科学—林木遗传育种] S718.5[农业科学—林学]