| Study on the effects of antidote to alleviate 2,4-D phytotoxicity of potato |
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| DOI：10.7606/j.issn.1000-7601.2025.04.25 |
| Key Words: Solanum tuberosum L. 2,4-D phytotoxicity antidote physiological structure organization structure |
| Author Name | Affiliation | | LEI Yujun | College of Agriculture, Gansu Agricultural University, State Key Laboratory of Arid Land Crop Science, Lanzhou, Gansu 730070, China | | YUAN Jianlong | College of Agriculture, Gansu Agricultural University, State Key Laboratory of Arid Land Crop Science, Lanzhou, Gansu 730070, China | | TANG Zhensan | College of Agriculture, Gansu Agricultural University, State Key Laboratory of Arid Land Crop Science, Lanzhou, Gansu 730070, China | | CHENG Lixiang | College of Agriculture, Gansu Agricultural University, State Key Laboratory of Arid Land Crop Science, Lanzhou, Gansu 730070, China | | SHI Zhendong | College of Agriculture, Gansu Agricultural University, State Key Laboratory of Arid Land Crop Science, Lanzhou, Gansu 730070, China | | ZHUO Fengqi | College of Life Science Technology, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | YU Bin | College of Agriculture, Gansu Agricultural University, State Key Laboratory of Arid Land Crop Science, Lanzhou, Gansu 730070, China | | ZHANG Feng | College of Agriculture, Gansu Agricultural University, State Key Laboratory of Arid Land Crop Science, Lanzhou, Gansu 730070, China |
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| Abstract: |
| The plants of potato variety ‘Gannongshu No.7’ were treated with 2 000 mg·L-1 2,4-D via foliar spraying, followed by the application of different concentrations of antidote, including ComCat (300 mg·L-1, 800 mg·L-1, and 1 200 mg·L-1), Brassinolide (250 μL·L-1, 450 μL·L-1, and 650 μL·L-1), and Antidote X (500 mg·L-1, 2 000 mg·L-1, and 4 000 mg·L-1) after 1 day. The leaves were collected at 1, 4, and 7 days to determine the contents of chlorophyll, carotenoid, auxin (IAA), and abscisic acid (ABA). The plant height, stem diameter, root length, and leaf area were measured at 7, 14, and 21 days. After 21 days, the root, stem, and leaf tissue sections were stained to observe the changes in cellular morphology. At maturity, the potato tuber yield was also recorded. The results showed that low concentrations of ComCat (300 mg·L-1), Brassinolide (250 μL·L-1), and Antidote X (500 mg·L-1) showed no significant effects on alleviating the phytotoxicity of 2,4-D. Higher concentrations of ComCat (800 mg·L-1, 1 200 mg·L-1) and Antidote X (2 000 mg·L-1, 4 000 mg·L-1) significantly alleviated the phytotoxicity of 2,4-D (P<0.05). Among these, 800 mg·L-1 ComCat showed the most significant detoxification effect. In the treatment of 800 mg·L-1 ComCat, the plant height, root length, leaf area, and individual plant yield were significantly increased by 67.84%, 43.04%, 66.76%, and 164.03%, respectively. The chlorophyll and carotenoid contents were significantly increased by 6.67% and 20.1%, while the levels of endogenous IAA and ABA were significantly decreased by 54.01% and 50.13%, respectively. In the antidote\|treated plants, the cell layer numbers of collenchyma in the far axial region of stem were decreased, and the cell density in the palisade tissue of leaves was increased. The application of different concentrations of ComCat, Brassinolide, and Antidote X could significantly alleviate the phytotoxicity caused by 2,4-D. The 800 mg·L-1 ComCat has the best detoxification effect. |
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