The Influence of Herbicides on Physiological Properties of Peanut

doi:10.11924/j.issn.1000-6850.casb2022-0462

Abstract

Abstract:

The effects of common herbicides on the physiological properties of peanut plants were studied to provide a theoretical basis for scientific application of herbicide and safe production. The effects of butachlor and glyphosate isopropylamine on the activities of acetolactate synthase (ALS), catalase (CAT), peroxidase (POD) and the content of malondialdehyde (MDA) in peanut were studied by the method of indoor bioassays combined with pot experiment. The results showed that the activities of the three enzymes and the MDA content in peanut increased first and then decreased in 20 days after being treated with different concentrations of two herbicides, which were consistent with the control. The low concentration treatment had little effect on ALS activity. In 10 days after being treated with concentration 4 and concentration 5 of the two herbicides, the activity of ALS was significantly higher than that of the control (P<0.05). 15 days after treatment，the ALS activity of peanut under the butachlor treatment of the two concentrations was 444.52 U/L and 440.48 U/L, respectively, and that of glyphosate isopropylamine treatment was 449.38 U/L and 459.92 U/L, respectively, which were significantly lower than that of the control (534.73 U/L). Butachlor treatment with concentration 5 had a great influence on the activity of CAT in peanut, which was 48.01 U/L 15 days after the treatment and significantly lower than that of control (51.24 U/L). The CAT activity in peanut treated by glyphosate isopropylamine with concentration 5 was significantly higher than that of the control within 20 days. After the peanut plants were treated with butachlor of concentrations 4 and 5, the POD activity was significantly lower than that of the control at first, and then gradually increased, which was significantly higher than that of the control on the 15th day and 20th day after the treatment. On the 15th day after glyphosate isopropylamine treatment, the POD activity of peanut increased to the maximum value, which was 255.57, 253.81, 245.02, 269.63 and 265.76 U/L, respectively, under the 5 concentrations, significantly higher than that of control (237.77 U/L). The MDA content of peanut after butachlor treatment was higher than that of control within 20 days, and the content was positively correlated with the concentration. MDA content showed a fluctuation rise after glyphosate isopropylamine treatment, reaching the maximum on the 10th day, then decreased to the control level or significantly lower than the control level. The results indicate that the two herbicides have certain effects on physiological properties of peanut plants, and their effects are positively correlated with the concentration. High concentration treatment has a stress effect on the growth of peanut.

Key words: herbicide, peanut, acetolactate synthetase, catalase, peroxidase, malondialdehyde

JIANG Chunyan, HONG Pengxiang, ZHANG Shuangzhao, LI Chunwei, ZHOU Meiling, LI Jianbin, JIANG Wei. The Influence of Herbicides on Physiological Properties of Peanut[J]. Chinese Agricultural Science Bulletin, 2023, 39(16): 101-108.

Figures/Tables 4

References 24

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