Influence of leaf excision on photosynthesis, seed setting and yield in okra

A study was carried out to determine the changes in photosynthesis and yield components associated with excision of leaves at different positions (odd and even nodes) in okra (Abelmoschus esculentum L. cv. Arka Anamika) plant. A higher sink/source ratio increased the photosynthetic rate and the leaf area of the remaining leaves. However, there was a reduction of 19–20% in fruit dry weight per plant where leaves were excised. The abortion of seeds was 15% in lower, 34% in middle and 49% in upper fruits when odd leaves were removed, while it was 17% in lower, 49% in middle and 54% in upper fruits when even leaves were removed. Though the involvement of compensatory mechanism and change in phyllotaxic relationship helped in maintaining fruit growth, seed abortion was at a higher magnitude in plants where leaves were excised, indicating insufficient photoassimilates for seed development and thus causing their abortion.