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五氟磺草胺对谷子叶绿素合成及代谢的影响机制

Mechanism of Penoxsulam's Effect on Chlorophyll Synthesis and the Metabolism of Foxtail Millet.

作者信息

Chen Tingting, An Qi, Zhang Ting, Yan Siyu, Li Jiaxing, Song Xie, Zhao Juan, Li Xiaorui, Hu Chunyan, Dong Shuqi

机构信息

College of Agronomy, Special Orphan Crops Research Center of the Loess Plateau, MARA, Shanxi Agricultural University, Taigu 030800, China.

College of Plant Protection, Shanxi Agricultural University, Jinzhong 030800, China.

出版信息

Plants (Basel). 2025 Apr 15;14(8):1211. doi: 10.3390/plants14081211.

DOI:10.3390/plants14081211
PMID:40284098
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12030371/
Abstract

Foxtail millet is a characteristic miscellaneous grain crop with many benefits in current agricultural production and is crucial in the adjustment of the planting structure and the sustainable development of dry farming. However, the harmful effects of weeds have become a critical challenge, restricting the modern production of foxtail millet. The effect of penoxsulam on the chlorophyll metabolism pathway of foxtail millet and its physiological mechanism was studied. Spraying penoxsulam on foxtail millet leaves significantly reduced the content of chlorophyll synthesis precursors (5-aminolevulinic acid (ALA), Porphobilinogen (PBG), Protoporphyrin IX (ProtoIX), Mg-protoporphyrin IX (Mg-ProtoIX), and Protochlorophyllide (Pchlide)). Moreover, the activities of key synthetic enzymes (magnesium chelatase (MgCh) decreased compared to control, while the activities of degrading enzymes (pheophorbide a oxygenase (PAO) and pheophytinase activities (PPH) increased significantly. The study revealed the mechanism of penoxsulam inducing crop phytotoxicity by interfering with the dynamic balance of chlorophyll metabolism, which provided a theoretical basis for the scientific application of herbicides and the study of foxtail millet drug resistance.

摘要

谷子是一种特色杂粮作物，在当前农业生产中具有诸多益处，对种植结构调整和旱作农业可持续发展至关重要。然而，杂草的危害已成为一项严峻挑战，制约着谷子的现代化生产。本研究了五氟磺草胺对谷子叶绿素代谢途径的影响及其生理机制。在谷子叶片上喷施五氟磺草胺显著降低了叶绿素合成前体（5-氨基乙酰丙酸（ALA）、胆色素原（PBG）、原卟啉IX（ProtoIX）、镁原卟啉IX（Mg-ProtoIX）和原叶绿素酸酯（Pchlide））的含量。此外，与对照相比，关键合成酶（镁螯合酶（MgCh））的活性降低，而降解酶（脱镁叶绿酸a加氧酶（PAO）和脱镁叶绿素酶活性（PPH））的活性显著增加。该研究揭示了五氟磺草胺通过干扰叶绿素代谢动态平衡诱导作物产生药害的机制，为除草剂的科学应用及谷子抗药性研究提供了理论依据。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fd9/12030371/adfa1e6edf2e/plants-14-01211-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fd9/12030371/adfa1e6edf2e/plants-14-01211-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0fd9/12030371/ca9f1e02b81e/plants-14-01211-g007.jpg
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