Allocation patterns of nonstructural carbohydrates in response to CO_(2)elevation and nitrogen deposition in Cunninghamia lanceolata saplings  

作　　者：Wenhui Zheng Renshan Li Qingpeng Yang Weidong Zhang Ke Huang Xin Guan Longchi Chen Xin Yu Qingkui Wang Silong Wang 

机构地区：[1]Fujian Provincial Key Laboratory of Resources and Environmental Monitoring and Sustainable Management and Utilization,Sanming University,Sanming 365004,People’s Republic of China [2]CAS Key Laboratory of Forest Ecology and Management,Institute of Applied Ecology,Huitong Experimental Station of Forest Ecology,Shenyang 110016,People’s Republic of China [3]Huitong National Research Station of Forest Ecosystem,Huaihua,Huitong 418307,People’s Republic of China [4]Life Science Department,Luoyang Normal University,Luoyang 471934,People’s Republic of China [5]Fujian Provincial Key Laboratory of the Development and Utilization of Bamboo Resources,Sanming University,Sanming 365004,People’s Republic of China

出　　处：《Journal of Forestry Research》2023年第1期87-98,共12页林业研究（英文版）

基　　金：the National Natural Science Foundation of China(Grant Nos.32192434,42007102);Natural Science Foundation of Fujian Province(Grant No.2020J01376);the Start-up Foundation for Advanced Talents in Sanming University(Grant No.19YG13);Educational Research Project for Young and Middle-aged Teachers of Fujian Provincial Department of Education(Grant No.JAT190704).

摘　　要：Stored nonstructural carbohydrates(NSC)indicate a balance between photosynthetic carbon(C)assimilation and growth investment or loss through respiration and root exudation.They play an important role in plant function and whole-plant level C cycling.CO_(2)elevation and nitrogen(N)deposition,which are two major environmental issues worldwide,aff ect plant photosynthetic C assimilation and C release in forest ecosystems.However,information regarding the eff ect of CO_(2)elevation and N deposition on NSC storage in diff erent organs remains limited,especially regarding the trade-off between growth and NSC reserves.Therefore,here we analyzed the variations in the NSC storage in diff erent organs of Chinese fi r(Cunninghamia lanceolata)under CO_(2)elevation and N addition and found that NSC concentrations and contents in all organs of Chinese fi r saplings increased remarkably under CO_(2)elevation.However,N addition induced diff erential accumulation of NSC among various organs.Specifi cally,N addition decreased the NSC concentrations of needles,branches,stems,and fi ne roots,but increased the NSC contents of branches and coarse roots.The increase in the NSC contents of roots was more pronounced than that in the NSC content of aboveground organs under CO_(2)elevation.The role of N addition in the increase in the structural biomass of aboveground organs was greater than that in the increase in the structural biomass of roots.This result indicated that a diff erent tradeoff between growth and NSC storage occurred to alleviate resource limitations under CO_(2)elevation and N addition and highlights the importance of separating biomass into structural biomass and NSC reserves when investigating the eff ects of environmental change on biomass allocation.

关 键 词：Biomass partition CO_(2)elevation N deposition Nonstructural carbohydrates Structural biomass 

分 类 号：S71[农业科学—林学]