Diurnal changes in the stomatal, mesophyll, and biochemical limitations of photosynthesis in well-watered greenhouse-grown strawberries

Abstract

Highlights• Photosynthetic rate was reduced even under well-watered greenhouse conditions • Stomatal closure predominantly limited photosynthesis under moderate conditions • Mesophyll conductance also contributed to limitation under severe conditions

Climate change increases net CO 2 assimilation in the leaves of strawberry, but not yield

“…Gas exchange in strawberry increases in the early morning to peak between late morning and early afternoon (Iwao et al, 2021;Kimura et al, 2020Kimura et al, , 2023Nakai et al, 2022;Yokoyama et al, 2023). For instance, Yokoyama et al (2023) found that net CO 2 assimilation on a sunny day in May in Japan increased from 11.8 µmol per m 2 per s at 0700 h to 15.0 µmol per m 2 per s between 0900 and 1300 h and then decreased to 11.0 µmol per m 2 per s at 1700 h. The changes in photosynthesis reflected changes in light levels, temperature and the opening and closing of the stomata.…”

“…Gas exchange in strawberry varies over days or weeks (Bunce, 2001;Garcia & Kubota, 2017;Kerkhoff et al, 1988;Sung & Chen, 1991;Yokoyama et al, 2023), although there are exceptions (Calderón-Zavala et al, 2022 in a glasshouse in Mexico). In Taiwan, gas exchange peaked 70 days after planting and then decreased (Sung & Chen, 1991).…”