Characterization of Wheat (Triticum aestivum) Response to Mesotrione, a Triketone Herbicide

IF 2.3 Q1 AGRICULTURE, MULTIDISCIPLINARY ACS agricultural science & technology Pub Date : 2024-03-26 DOI:10.1021/acsagscitech.3c00531

Susee Sudhakar, Sridevi Nakka, Asif Mohammad, Harold N. Trick, P.V. Vara Prasad and Mithila Jugulam*,

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Abstract

Mesotrione is used for weed control in corn and sorghum (pre-emergence) but not in wheat. Corn metabolizes mesotrione via the activity of cytochrome P450 (P450) enzymes. To understand the response of wheat genotypes to mesotrione application, a collection of wheat germplasm including winter, spring genotypes, and mutant lines was used in this research. In response to a 6× (1× = 105 g ai ha^–1) dose of mesotrione, two winter wheat genotypes (WW-1 and WW-2) were found to be least sensitive compared to the most sensitive genotype (WW-24), mutant lines (J38 and J327), and spring wheat. Further, application of a P450-inhibitor (malathion) before mesotrione treatment enhanced the sensitivity of WW-1 and WW-2 to mesotrione, suggesting a possible role of P450 enzymes in the detoxification of mesotrione. WW1 and WW2 were found to tolerate higher doses of mesotrione and could be potential donors for the transfer of the mesotrione-resistant trait into elite wheat genotypes.

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小麦（Triticum aestivum）对三酮类除草剂 Mesotrione 的反应特征

甲草胺用于玉米和高粱（萌芽前）除草，但不适用于小麦。玉米通过细胞色素 P450（P450）酶的活性代谢甲草胺。为了了解小麦基因型对施用甲霜灵的反应，本研究使用了一系列小麦种质，包括冬小麦、春小麦基因型和突变株系。与最敏感的基因型（WW-24）、突变品系（J38 和 J327）以及春小麦相比，两种冬小麦基因型（WW-1 和 WW-2）对 6 倍（1× = 105 g ai ha-1）剂量的间三嗪反应最不敏感。此外，在处理甲霜灵之前施用 P450 抑制剂（马拉硫磷）会增强 WW-1 和 WW-2 对甲霜灵的敏感性，这表明 P450 酶可能在甲霜灵的解毒过程中发挥作用。研究发现，WW1 和 WW2 能耐受较高剂量的甲霜灵，可作为抗甲霜灵性状转移到小麦优良基因型的潜在供体。

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ACS agricultural science & technology

CiteScore

2.80

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