Diurnal decline in photosynthesis and stomatal conductance in several tropical species.

ABSTRACT: Photosynthesis (A) and stomatal conductance (g_s) change diurnally due to internal signals, but the effects of diurnal rhythms on dynamic photosynthetic behavior are understudied. We examined diurnal changes in A and g_s in ten tropical species: across species, there was a tendency for A and g_s to decline diurnally when these were repeatedly measured under either steady-state or fluctuating irradiance conditions. We then examined in more detail the irradiance-induced kinetics of gas exchange in a C₃ and C₄ crop species each, namely fig (Ficus carica) and sugarcane (Saccharum officinarum). During the day, fig showed significantly slower photosynthetic induction and lower g_s</

SUBMITTER: Suwannarut W 

PROVIDER: S-EPMC10628437 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature