Effect of Promalin on Growth and Development of Kale ( Brassica oleracea L. Var. Acephala DC)

摘要

A net greenhouse experiments were carried out to evaluate the effect of promalin on growth and development of kale. Promalin at 25, 50 and 75 mg L^-1 significantly increased total leaf chlorophyll content, chlorophyll a and b contents, the percentage of chlorophyll a and b to chlorophyll, total leaf area, plant height, leaf number per plant, leaf size (leaf length, leaf blade diameter, leaf blade length and petiole length), plant dry matter and fresh leaf yield. Promalin at 50 or 75 mg L^-1 increased stem and root dry matter accumulation and partitioning to the stem. Promalin at 25, 50 or 75 mg L^-1 decreased significantly the leaf water content and significantly increased vegetative, root growth and yield of kale plants. Promalin also induced the growth of a leaf petiole from the mid-rib leading to a leaflet from the leaf mid-rib. Promalin at 50 mg L^-1 has the potential to be used to improve the growth, development and yield of kale.