基于同质园的不同种源兴安落叶松叶呼吸及其对环境的响应  

Leaf respiration and its response to environment in different provenances of Larix gmelinii based on exchanging common-gardens

作　　者：李璐瑶 刘亚龙 田瑞萍 张俊[1] 张栋甲 王传宽[1] 全先奎[1] LI Luyao;LIU Yalong;TIAN Ruiping;ZHANG Jun;ZHANG Dongjia;WANG Chuankuan;QUAN Xiankui(Ministry of Education Key Laboratory of Sustainable Forest Ecosystem Management,Northeast Forestry University,Harbin 150040,China;Technical Promotion Station of Forest Management Department of Daxing'anling Forestry Group Company,Jiagedaqi 165002,Heilongjiang,China)

机构地区：[1]东北林业大学森林生态系统可持续经营教育部重点实验室,哈尔滨150040 [2]大兴安岭林业集团公司森林经营部技术推广站,黑龙江格达奇165002

出　　处：《应用生态学报》2025年第2期395-402,共8页Chinese Journal of Applied Ecology

基　　金：国家重点研发计划项目(2021YFD220040107)资助。

摘　　要：探讨树木叶呼吸对环境变化的响应及其种源差异有助于深入理解树木对环境的适应机制。采用同质园互置试验,研究了11个种源兴安落叶松针叶在不同环境下的呼吸及其影响因素。结果表明:与低温干燥同质园相比,温暖湿润的同质园内树木叶片在15℃下呼吸速率(R_(15))、氮浓度和可溶性糖浓度均显著增大,而叶片在25℃下呼吸速率(R_(25))、35℃下呼吸速率(R_(35))、呼吸温度敏感系数(Q_(10))和淀粉浓度均显著减小,这是环境驯化的结果。R_(15)与氮浓度、可溶性糖浓度呈显著正相关,与淀粉浓度呈显著负相关。R_(25)和R_(35)均与氮浓度、可溶性糖浓度呈显著负相关,与淀粉浓度呈显著正相关。R_(15)、R_(25)、R_(35)和Q_(10)对环境变化的响应均存在明显的种源差异,R_(25)的环境效应与种子来源地的年均温呈显著正相关,这是对原生长环境长期适应的结果。兴安落叶松叶呼吸受到遗传适应和环境驯化的共同调控。Exploring the response of leaf respiration to environmental change and its provenance variation is helpful for understanding the adaptation of trees to environment. We constructed an experiment by transplanting Larix gmelinii seedlings from 11 provenances to two common gardens, and measured leaf respiration and environmental factors. The results showed that leaf respiration rate measured at 15 ℃(R_(15)), nitrogen concentration and soluble sugar concentration of trees growing in the warm and humid common garden were higher than those growing in the cold and dry common garden. In contrast, leaf respiration rate measured at 25 ℃(R_(25)) and 35 ℃(R_(35)), respiration temperature sensitivity coefficient(Q_(10)) and starch concentration of trees growing in the warm and humid common garden were lower than those growing in the cold and dry common garden. This indicated that leaf respiration acclimatized to local environment. R_(15) was positively correlated with nitrogen concentration and soluble sugar concentration, and negatively correlated with starch concentration. Both R_(25) and R_(35) were negatively correlated with nitrogen concentration and soluble sugar concentration, and positively correlated with starch concentration. There were significant provenance differences in the response of R_(15), R_(25), R_(35) and Q_(10) to environmental change. The environmental effect of R_(25) was positively correlated with mean annual temperature of origin site, which was the result of long-term adaptation. Our results indicated that leaf respiration of L. gmelinii was controlled by both environmental acclimation and genetic adaptation.

关 键 词：环境变化 呼吸速率 驯化 适应 

分 类 号：G63[文化科学—教育学]