PJB-2024-361
Phytohormone pretreatment mitigates the negative impacts of salt stress on the germination of common buckwheat seeds (Fagopyrum esculentum)
Congfei Yin
Abstract
Salinity is a significant environmental factor that impacts agricultural output globally. Salinity has the greatest impact on seed germination, which is the most vulnerable stage. Common buckwheat, scientifically known as Fagopyrum esculentum Moench, is a minor crop that is extensively grown and holds significant economic value in the regions of southwest and northwest China. Nevertheless, there is limited knowledge regarding the impact of plant hormones on seed germination in the presence of salt stress. In this study, our results have shown that the germination rate decreased with increasing NaCl concentration. The impact of four distinct artificial plant hormones (ethephon; gibberellin, GA3; 6-benzylaminopurine, 6-BA; and naphthalene acetic acid, NAA) at varying levels on seed germination under low (50 mmol L-1 NaCl) and high (100 mmol L-1 NaCl) salt stress levels was examined. Pretreatments with ethephon, GA3 and 6-BA have alleviated the adverse effects of salt stress during seed germination, whereas pretreatment with NAA has aggravated the adverse effects due to salt stress. Ethephon at a concentration of 100 mg L-1, GA3 at a concentration of 100 mg L-1, and 6-BA at a concentration of 200 ug L-1 were found to be the most successful remedies for mitigating the negative impact of salt stress on the germination of common buckwheat seeds. This study provides a new insight for cultivation of common buckwheat especially the seed germination of common buckwheat in the saline environments.
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