A MACRO LOOK TO CANOPY TEMPERATURE & LEAF TEMPERATURE: A REVIEW

Abstract

Canopy temperature is a driver of plant function emerging as a result of interacting biotic and abiotic factors. Plant canopy temperature is partly regulated by evaporation and transpiration and is an indirect measure of transpiration rate and stomatal conductance. The determination of crop water status has positive effects on irrigation decisions. Infrared thermal imaging cameras are effective tools to monitor the spatial distribution of canopy temperature. Canopy temperature is often related to potential yield and is a possible yield indicator in breeding programs. Plants must regulate leaf temperature to optimize photosynthesis, control water loss and prevent damage caused by overheating or freezing. Leaf temperature changes with incident light intensity. There is general concern that the rapid increase in atmospheric CO2 concentration will lead to reduced stomatal conductance and subsequent increases in leaf temperature. Here in this review, a macro look to canopy temperature and leaf temperature is presented by the help of new data from international articles. Plant functional diversity is strongly connected to photosynthetic carbon assimilation in terrestrial ecosystems. However, many of the plant functional traits regulating photosynthetic capacity, including foliar nitrogen concentration and leaf mass per area, vary significantly between and within plant functional types and vertically through plant canopies (Kamoske et al., 2021). Canopy structure explains the relationship between photosynthesis and sun-induced chlorophyll ALTERNATIVE PATHS TO SUSTAINABLE AGRICULTURE | 204 fluorescence in crops (Dechant et al., 2020). Ecological research heavily relies on coarse-gridded climate data based on standardized temperature measurements recorded at 2 m height in open landscapes. However, many organisms experience environmental conditions that differ substantially from those captured by these macroclimatic temperature grids (Haesen et al., 2021). Water is a crucial element for plant growth, metabolic processes, and general health. Water-deficit, typically simplified by drought stress, is the most critical photosynthetic source of stress that restricts plant growth, crop yield, and food product quality (Awais et al., 2021)