Abstract
Abstract The present paper reports the effects of morphactin on leaf morphology and stomatal apparatus of Vigna radiata. Morphactin treated plants showed fusion of leaflets resulting in the formation of a simple leaf with various modifications or amplification giving rise to tetra-, penta-, and multifoliate leaves simulating palmate leaves. The area of leaflets and petiole size of treated plants were considerably reduced. Morphactin also changed the form of stomata with paracytic, anisocytic and anomocytic types observed. A reduction in frequency of stomata, size of epidermal cells, trichomes and stomatal pore were common with an increase in stomatal size on the abaxial surface. Aberrations such as contiguous stomata, stomatal degeneration and stomata having a single guard cell were noted. Since the action of morphactin is in the direction of reducing transpiration, the application of this substance may be helpful in cultivation of crops exposed to periodic dry conditions.
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