“…Thus, the photosynthetic rate is a crucial trait reflecting a plant's response to environmental changes. Usually, plants have a higher light-saturated photosynthetic rate under optimum temperature conditions ( An et al., 2017 ). Both low and high temperatures can depress the photosynthetic rate and stomatal conductance of plants ( Greer and Weston, 2010 ; Greer and Weedon, 2011 ; Wu et al., 2014 ).…”