Effects of Hormones on Seed Germination of Schizonepeta tenuifolia Briq. Under Drought and Salt Stress

doi:10.11923/j.issn.2095-4050.cjas2021-0158

Abstract

Abstract:

The effects of different concentrations of gibberellin (GA), naphthylacetic acid (NAA) and indoleacetic acid (IAA) on Schizonepeta tenuifolia seed germination under the stress of drought and salt were studied. The solution of PEG-6000 and NaCl were used to simulate drought and salt stress, and the germination thresholds were 10% PEG-6000 and 150 μmol/L NaCl. The results showed that except the GA treatment under salt stress, the effect of the three hormones on the germination rate of S. tenuifolia seeds first increased and then decreased. The hormone with the best germination effect was GA. Under drought and salt stress, the optimal concentration of GA was 0.1 mg/L and 1 mg/L, and the germination rate was 73.00% and 58.67%, respectively. Under drought stress, the effect of NAA treatment was better than that of IAA treatment, but 10 mg/L NAA had intensified inhibition effect on seed germination. Under salt stress, the effect of the three hormones on germination rate had little difference, but the germinative force and germination index of seeds treated with GA outclassed those of NAA and IAA.

Key words: Schizonepeta tenuifolia Briq., hormone, NaCL stress, PEG-6000 stress, germination rate

SI Mingdong, LI Jiacheng, LI Xinrui, SUN Huigai, LI Jing, ZHENG Yuguang, MA Donglai. Effects of Hormones on Seed Germination of Schizonepeta tenuifolia Briq. Under Drought and Salt Stress[J]. Journal of Agriculture, 2023, 13(1): 16-20.

Figures/Tables 3

References 17

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