Journal of Guangxi Normal University(Natural Science Edition) ›› 2025, Vol. 43 ›› Issue (1): 58-64.doi: 10.16088/j.issn.1001-6600.2024022903

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Effects of Sodium Selenite on Growth and Resistance of Quinoa under Salinity Stress

YAN Fanfan1, ZHANG Yongqing1,2*, ZHANG Meng1, HE Jiaming1, CHENG Weiwei1, JING Maoya1   

  1. 1. School of Life Sciences, Shanxi Normal University, Taiyuan Shanxi 030031, China;
    2. School of Geographic Sciences, Shanxi Normal University, Taiyuan Shanxi 030031, China
  • Received:2024-02-29 Revised:2024-05-06 Online:2025-01-05 Published:2025-02-07

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Abstract: In order to investigate the effect of sodium selenite on the growth and physiological characteristics of quinoa under saline and alkaline stress, and to clarify its optimal spraying concentration under saline and alkaline stress, Long quinoa No. 4 was selected as the experimental material, and a one-factor completely randomized design was adopted using the method of pot planting test, with different concentrations of sodium selenite as the variables, five Na2SeO3 concentration gradients, and control group (without salt stress) were set up to study the effects of foliar spraying with different concentrations of sodium selenite on plant height, stem thickness of quinoa under different saline stresses, fresh weight, antioxidant enzyme activities, osmoregulatory substances and root vigor of quinoa under different saline and alkaline stresses. The results of the study showed that compared with control group, saline stress caused some degree of damage to quinoa’s morphological constructs, physiological characteristics, and even affected the growth and development of quinoa. Through foliar spraying of sodium selenite, the degree of damage to quinoa by saline stress was slowed down, plant height, stem thickness and fresh weight of quinoa were significantly increased, antioxidant enzyme activities and osmoregulatory substances of quinoa were improved, damage to quinoa membrane cells by saline stress was slowed down, root vigor of quinoa was improved, absorption of soil nutrients and water by quinoa under saline stress was promoted, and ultimately quinoa’s resistance of quinoa to salinity stress was improved. The results of the integrated affiliation function values indicated that the concentration of sodium selenite at 15 mg/kg was the most favorable to alleviate the salinity stress of quinoa. In conclusion, foliar spraying of sodium selenite had a significant effect on the growth and physiological characteristics of quinoa under saline and alkaline stress, and the best effect was achieved at a concentration of 15 mg/kg.

Key words: Chenopodium quinoa, salinity stress, sodium selenite, physiological characteristics, root vigor

CLC Number:  S519
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