Effects of Coronatine on the Peanut (Arachis hypogaea L.) Seed Germination and Seedling Growth Under Drought Stress
The aim was to study the effect of suitable concentration coronatine (COR) soaking to improve the drought resistance of peanut seedlings and provide the basis for the application of COR in production. Under normal water and simulated drought with 25%polyethylene glycol (PEG) conditions, the effects of presoaking with different concentrations of coronatine (COR) on peanut seed germination and seedling growth were studied. Simulated drought had serious effects on seed germination and seedling growth. Presoaking with 0.0001-1 μmol/L COR compensated the inhibitory effect on seed germination and seedling growth in different degrees, the 0.01 μmol/L COR showed the best effect. The germination potential, germination rate, germination index and vigor index, shoot growth and dry matter accumulation of seedlings were significantly improved. The root growth was close to the control level, so that the root to shoot ratio was improved more significantly. COR could obviously alleviate the effects of drought on the growth of peanut seedlings, 0.01 μmol/L COR soaking could be used as the technical measures to improve the drought resistance of peanut seedlings.
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