Qiu Hailong, Sun Chao, Dormatey Richard, Bai Jiangping, Bi Zhenzhen, Liu Yuhui, Liu Zhen, Wei Jingui, Mao Shoufa, Yao Panfeng
State Key Laboratory of Aridland Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China.
CSIR-Crops Research Institute, P.O. Box 3785, Kumasi 00233, Ghana.
Plants (Basel). 2024 Feb 7;13(4):477. doi: 10.3390/plants13040477.
(1) Background: Potato is the most important tuber crop in the world that can contribute to food security. However, the crop has been shown to be sensitive to drought and its yields decline significantly during successive periods of stress. Drought triggers a number of responses in potato, ranging from physiological changes to fluctuations in growth rates and yields. In light of global climate change, it is important to understand the effects of thiamethoxam on potato growth and yield under drought conditions. (2) Methods: The objective was to evaluate the impact of thiamethoxam on improving drought resistance and yield of potato under drought conditions. The drought-tolerant and sensitive-genotypes Qingshu No. 9 and Atlantic were used for a two-year pot experiment. Potato seeds were coated with 70% thiamethoxam before sowing (treatment group (T)), with a control group without treatment (NT). Two experimental treatments were applied: normal irrigation (ND) and drought stress (D). (3) Results: The results showed that root length, plant yield, chlorophyll content and superoxide dismutase (SOD) activity significantly increased under both genotypes, while malondialdehyde (MDA) and proline (Pro) content were reduced under thiamethoxam under drought stress. The best indicators were obtained in the comprehensive evaluation for the T-D treatment, suggesting that the application of thiamethoxam under drought stress was more effective than normal irrigation. (4) Conclusions: Our results suggest that the application of thiamethoxam improves potato growth, thereby increasing drought tolerance and potato yield. However, thiamethoxam is a neonicotinoid pesticide, and the limitation of this study is that it did not explore the ecological effects of thiamethoxam, which need to be systematically studied in the future. Moreover, considering the potential risks of thiamethoxam to the environment, specific agronomic measures to effectively degrade thiamethoxam residue should be taken when it is applied in agricultural production.
(1) 背景：马铃薯是世界上最重要的块茎作物，对粮食安全有重要贡献。然而，该作物已被证明对干旱敏感，在连续的胁迫期内其产量会显著下降。干旱会引发马铃薯的一系列反应，从生理变化到生长速率和产量的波动。鉴于全球气候变化，了解噻虫嗪在干旱条件下对马铃薯生长和产量的影响非常重要。(2) 方法：目的是评估噻虫嗪对提高干旱条件下马铃薯抗旱性和产量的影响。使用耐旱和敏感基因型青薯9号和大西洋进行了为期两年的盆栽试验。播种前用70%噻虫嗪包衣马铃薯种子（处理组（T）），设不处理的对照组（NT）。采用两种试验处理：正常灌溉（ND）和干旱胁迫（D）。(3) 结果：结果表明，在两种基因型下，根长、植株产量、叶绿素含量和超氧化物歧化酶（SOD）活性均显著增加，而干旱胁迫下噻虫嗪处理的丙二醛（MDA）和脯氨酸（Pro）含量降低。T-D处理的综合评价指标最佳，表明干旱胁迫下施用噻虫嗪比正常灌溉更有效。(4) 结论：我们的结果表明，施用噻虫嗪可改善马铃薯生长，从而提高耐旱性和马铃薯产量。然而，噻虫嗪是一种新烟碱类农药，本研究的局限性在于未探讨噻虫嗪的生态效应，未来需要进行系统研究。此外，考虑到噻虫嗪对环境的潜在风险，在农业生产中应用时应采取有效降解噻虫嗪残留的具体农艺措施。
