A review on leaf temperature based on oxygen isotope ratios of plants
As a key factor influencing plant productivity and material cycling,leaf temperature is an important pa-rameter in photosynthesis and respiration models and earth system models.Leaf controls temperature by regulating stomata and morphological traits,consequently maintains leaf temperature suitable for photosynthesis and prevents leaf from being damaged by high-temperature stress.Photosynthesis-weighted leaf temperature(T L-photo)estimated by the fractionation of plant cellulose(Δ18O Cel)integrates leaf temperature during photosynthesis.The stability of T L-photo indicates the effectiveness of plants in leaf thermoregulation,but the relationship between T L-photo and air tem-perature remains uncertain.In this review,we discuss the eco-physiological significance and mechanism of leaf ther-moregulation,with emphasis on the theoretical basis,model derivation,and uncertainty of measurement methods and results of T L-photo estimating from Δ18O Cel.We put forward that improving the accuracy of Δ18O Cel-T L-photo model and its applicability in studying T L-photo at different scales of leaf-plant-ecosystem should be the main direction of further research.
leaf thermoregulationphotosynthesis-weighted leaf temperatureleaf temperature homeostasiscellu-lose 18Oplant functional trait
万方数据
维普
