摘要
为探究珍稀濒危植物大别山五针松(Pinus dabeshanensis)不同叶龄针叶光合参数的差异性,探究光合参数与植株大小和叶龄等生物因子的关系,本研究以安徽岳西县大别山腹地人工种植的15年生大别山五针松为试验材料,测定了1、2和3年生针叶的8个光合参数。结果表明,净光合速率(Pn)、气孔导度(Gs)、胞间CO_(2)浓度(Ci)、蒸腾速率(Tr)、气孔限制值(Ls)、水分利用效率(WUE)、CO_(2)利用效率(CUE)和光利用效率(LUE)在不同叶龄针叶间差异有统计学意义,但各参数变化规律不完全一致;Ls和WUE以2年生针叶最高,Ci以2年生针叶最低,其他5个参数以3年生针叶最低。Pn、Gs、Tr、CUE及LUE与冠幅直径、叶龄均呈负相关,且针叶含水量也随叶龄增加呈下降趋势。
To compare the differences of photosynthetic parameters in different-age needles of a rare and endangered plant,Pinus dabeshanensis,and explore the relationship between photosynthetic parameters and biotic factors including plant size and needle age.Artificially planted 15-year-old Pinus dabeshanensis individuals in the hinterland of the Dabie Mountains,Yuexi County,Anhui Province were chosen as the experimental material,and eight photosynthetic parameters of 1-,2-,and 3-year-old needles were determined.The results showed that the net photosynthetic rate(Pn),stomatal conductance(Gs),intercellular CO_(2) concentration(Ci),transpiration rate(Tr),stomatal limitation(Ls),water use efficiency(WUE),CO_(2) use efficiency(CUE),and light use efficiency(LUE)were different among needles with different ages,whereas the change trends of these parameters were not completely consistent.Among them,the Ls and WUE of the 2-year-old needles were the highest,whereas the Ci was the lowest.The other five parameters of the 3-year-old needles were the lowest.The Pn,Gs,Tr,CUE,and LUE were negatively correlated with crown diameter and needle age,and the needle water content also showed a decreasing trend with increasing needle age.
作者
刘佳
戈玉莹
洪志
张媛媛
翟伟
项小燕
陶冶
LIU Jia;GE Yuying;HONG Zhi;ZHANG Yuanyuan;ZHAI Wei;XIANG Xiaoyan;TAO Ye(College of Life Sciences,Anqing Normal University/The Belt and Road Model International Science and Technology Cooperation Base for Biodiversity Conservation and Utilization in Basins of Anhui Province/Anhui Province Key Laboratory of the Biodiversity Study and Ecology Conservation in Southwest Anhui,Anqing 246133,China)
出处
《安徽农学通报》
2024年第5期36-44,共9页
Anhui Agricultural Science Bulletin
基金
皖西南生物多样性研究与生态保护安徽省重点实验室开放基金项目(wz202002,wy202204)
安徽省自然科学基金(1908085MC58)
安徽省科研编制计划项目(2023AH010041)。
关键词
大别山五针松
叶龄
光合作用
叶含水量
个体大小
Pinus dabeshanensis
needle age
photosynthesis
needle water content
individual size
