Effects of foliar application of marine algae extract on the growth and development of roots and shoots in Satsuma mandarin under plastic house conditions
1999
Mohammad, P. (The United Graduate School of Agricultural Sciences (Japan)) | Shiraishi, M.
The effects of foliar application of marine algae extract (RIC-1) on the growth and development of roots and shoots in satsuma mandarin were studied under plastic house conditions. The 500 times diluted sprays of this extract enhanced the formation of fibrous roots and at higher concentration (300 times diluted), root rotting occurred. While at lower concentration (1000 times diluted), the roots became comparatively thicker. The formation of new branches and their lengths were higher in all treated trees with maximum value at 500 times diluted spray compared to those of control. The number of leaves and their size in terms of length and width were significantly higher in the treated trees having the maximum output under 500 times diluted treatment. Light microscopic observation revealed the accumulation of numerous starch grains in the mesophyll cells of leaves in the treated trees. The starch grain number/cell increased along the increased concentration of RIC-1 sprays from 1000 times diluted to 300 times diluted. The width of mesophyll cell layer also similarly increased in RIC-1 treated leaves. This study suggested 500 times diluted RIC-1 spray as optimum for the growth and development of roots, branches and leaves of Satsuma mandarin trees under plastic house conditions.
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