Objective The effects of different concentrations of ABA soaking on seed germination and growth of turnip were studied to provide reference for the quality formation and stress physiology of turnip.
Method Turnip ( Brassica rapa L. subsp. rapa) seeds were soaked with different concentrations ( 0, 1, 5, 10, 20, 40, 80, 160 μmol/L) of ABA and then sown on the planting plate. The germination, growth physiological indexes and basic nutritional quality indexes of turnip seeds were determined, and the membership function analysis was carried out.
Results (1) The germination of turnip seeds was significantly inhibited by soaking with ABA in a concentration-dependent manner, and the germination rate was only 14% at 160 μmol/L. (2) Leaf elongation growth slowed down and the carotenoid content of leaves was higher than that of the control. Seed soaking with (3) 1 μmol/LABA had a significant effect on the spherical index and economic coefficient of turnip fleshy roots. The soluble protein content of leaves and the vitamin C content of fleshy roots were the highest after 10μmol/LABA soaking. The soluble protein content of fleshy roots was the highest at 20 μmol/L.
Conclusion The induction of exogenous ABA on turnip seeds can inhibit the germination of turnip seeds and thus affect the elongation and growth of seedlings, and the basic nutritional quality of turnip plants and fleshy roots is also affected.
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