Effect of L-beta-phenyllactic acid on growth of rice seedlings
2010
Adachi, Y., Niigata Univ. (Japan) | Kimura, K. | Saigusa, M. | Watanabe, H.
Expanding the root system including the total number, length and area of roots is efficient to obtain the high recovery rate of fertilizer, especially in co-situs application using a controlled availability fertilizer (CAF), We investigated the effects of L-beta-Phenyllactic Acid (LBP) on growth of both shoot and root in rice seedlings. Rice seedlings were cultured in the seed packssup(TM) containing 1/100 strength MS nutrient solution with or without 100mg/L LBP. Agronomical parameters were measured and the total root area was calculated according to the method described by Kimura (2001) after two weeks seeding. The plant age and plant height of rice seedlings were markedly enhanced by LBP treatment than those of control. The seminal root length of seedlings was also significantly (P0.05) increased by 26% compared with that of control. In contrast, the root number per seedling was not affected by LBP treatments. Correlation between the total area of root, and the number of root or the seminal root length were not observed. It should be noted that LBP significantly (P0.05) increased the total area of root of seedlings through those of the thinner lateral root (less than 0.757 mm in diameter), not of the thicker one. These results suggest that the high recovery rate of fertilizer in co-situs application with a CAF is possible by using LBP.
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