Abstract
AbstractIncreased air flow and light intensity increased the rate of photosynthesis of attached sugarcane leaves. At constant, low flow rates greater photosynthetic rates, leaf porosity, and stomatal opening accompanied increased light intensity. At constant light intensity, greater photosynthetic rates but lesser porosity and lesser stomatal opening accompanied increased air flow. The highest rate of photosynthesis (53 mg dm–2 h–1) was observed when both air flow and light intensity were at a maximum, even though porosity was minimal and no stomata appeared open. It is concluded that stomataL resistance of sugarcane leaves does not control rates of photosynthesis except when that resistance is very high.
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