生态学报2018，Vol.38Issue(8)：2616-2624,9.DOI:10.5846/stxb201705080848
植物呼吸释放CO2碳同位素变化研究进展
Variation in the carbon isotope composition of CO2 derived from plant autotrophic respiration
摘要
Abstract
Stable carbon isotopes have become an important tool to advance our understanding of carbon cycle processes.The carbon isotope signature of plant-respired CO2 (δ13 CR) is widely used for disentangling key physiological processes,carbon allocation,and responses to changing environmental conditions.In this review,we summarize short-term dynamics of δ13CR.Plant organs differ in both their δ13CRvalues and the magnitude of their diel variation:leaf ＞ root ＞ trunk and stem.Plant functional types differ in the magnitude of the diurnal shift in δ13CR.The correlation between the diel variation of δ13 CR and the isotopic signature of the substrate is not consistent across various studies.The isotopic signature of respired CO2 is determined by the isotope effects of photosynthetic carbon assimilation,respiratory substrate availability,the utilization of respiratory intermediates,and respiratory enzymes in connection with different carbon metabolic pathways,light enhanced dark respiration (LEDR),species-specific genetic characteristics,and changes in environmental factors.Despite recent advances in the understanding of the potential mechanisms driving short-term variation in plant δ13 CR,more research is required to unravel the underlying respiratory metabolic mechanisms.Stable isotope techniques have been employed in various ecological and environmental studies in China.However,not much work has been done in the field of plant δ3CR and its physiological mechanisms.We hope this review will strength our understanding of the recent advances in plant δ13CR research and promote the progress of in-depth research on plant respiratory metabolism in China.关键词
稳定碳同位素/植物自养呼吸/同位素效应/环境因素Key words
stable carbon isotope/plant autotrophic respiration/isotope effect/environmental factor引用本文复制引用
柴华,钟尚志,崔海莹,李杰,孙伟..植物呼吸释放CO2碳同位素变化研究进展[J].生态学报,2018,38(8):2616-2624,9.基金项目
国家重点基础研究发展计划项目(2015CB150800) （2015CB150800）
国家自然科学基金项目(31270445,31570470) （31270445,31570470）
中央高校基本科研业务费专项资金(2412016KJ008) （2412016KJ008）
