As more gases can flow between the plant and the atmosphere when the stomata are open, transpiration—the loss of water from plants as vapor—is at its highest.
Abstract. Reduced stomatal conductance to CO2 (gs) and photosynthetic metabolic potential (PMP) are two mechanisms by which water deficit (WD) reduces photosynthetic rate (A) (Apot). Regarding light intensity and experimental methods, the relative significance of gs and Apot as well as how they are impacted by WD are discussed.
The rate of photosynthesis is indirectly influenced by water. When the water supply is limited, stomatal closure affects how quickly photosynthesis occurs.
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