增温对林木细根呼吸及非结构性碳水化合物的影响研究综述  

A Review on the Effects of Warming on Plant Fine Root Respiration and Non-structural Carbohydrates

作　　者：陈心怡 钟羡芳[1] 吴晨 黄锦学[1] 熊德成[1,2] CHEN Xinyi;ZHONG Xianfang;WU Chen;HUANG Jinxue;XIONG Decheng(School of Geographical Sciences,Fujian Normal University,Fuzhou 350007,China;Fujian Sanming Forest Ecosystem National Observation and Research Station,Sanming 365000,Fujian,China)

机构地区：[1]福建师范大学地理科学学院,福州350007 [2]福建三明森林生态系统国家野外科学观测研究站,福建三明365000

出　　处：《亚热带资源与环境学报》2023年第3期102-108,共7页Journal of Subtropical Resources and Environment

基　　金：国家自然科学基金项目(32071743、31901132);福建省公益类科研院所专项目(2022R1002004)。

摘　　要：植物细根是地下根系最敏感、活跃的部分,也是植物重要的吸收器官,全球变化背景下细根的代谢过程在陆地生态系统生物地球化学循环中起着关键的作用。本研究在收集整理国内外相关文献的基础上,综述增温对林木细根重要代谢特征,即对呼吸和非结构性碳水化合物(Non-Structural Carbohydrates,NSC)的影响,进一步探讨该研究方向亟待解决的关键问题并展望未来研究。未来的研究有待从以下几个方面进一步深入:1)结合多种增温方式,开展更大物种范围、更长时间尺度的地上、地下同时增温试验;2)加强野外原位增温试验研究,以更准确地探索增温对细根呼吸和NSC浓度的影响;3)深入研究细根呼吸适应及其与NSC浓度的关系;4)考虑增温与其他气候因子的交互作用对细根呼吸和NSC浓度的影响,以深入分析植物细根代谢机制对全球变化的响应。本研究结果有助于深化对生态系统地下C分配、全球变暖与土壤CO_(2)排放之间反馈的理解,并可为全球变暖背景下植物地下生态学研究提供一定理论参考。Plant fine root is the most sensitive and active part of the belowground root system,and it also acts as an important organ of absorption.Under the context of global warming,the metabolism process of fine root plays a key role in the biogeochemical cycle of terrestrial ecosystems.Based on the collection of relevant domestic and foreign literatures,this study reviewed the effects of warming on important metabolic characteristics of fine roots,namely,respiration and non-structural carbohydrates(NSC),and the key problems and prospects that need to be solved urgently in this field of research.In current study,there is still controversy over whether there is high-temperature adaptation of fine root respiration during the growing season and the response and adaptation mechanism of fine root respiration to warming are still uncertain.While other environmental factors remain unchanged,some experiments have found that long-term warming may lead to a decrease in fine root respiration rate and NSC concentration.Future research still needs to be carried out in-depth from the following aspects,1)Adopting varieties warming methods to conduct simultaneous above-ground and below-ground warming experiments with a larger species range and longer time scale.2)Promoting field in situ warming experiments to more accurately study the effect of warming on fine root respiration and NSC concentration.3)Conducting in-depth study of the relationship between fine root respiration acclimation and NSC concentration.4)Considering the interaction of warming and other environmental factors on fine root respiration and NSC concentration,in order to deeply analyze the response of plant fine root metabolism mechanisms to global change.The results of this study will help to strengthen the understanding of the feedback between belowground C allocation in ecosystems,and emissions between global warming and soil CO_(2),and can provide certain theoretical references for the study of plant belowground ecology under global warming.

关 键 词：非结构性碳水化合物 全球变暖 生物地球化学循环 代谢机制 展望未来 代谢特征 陆地生态系统 地下根系 

分 类 号：Q948.11[生物学—植物学]