Document Type : Research Article
Authors
1
lorestan University
2
MSc. student of Weed Science, Department of Plant Protection, Faculty of Agriculture, Lorestan University, Khorramabad
3
Assistant Professor, Plant Protection Research Department, Lorestan Agricultural and Natural Resources Research, and Education Center, AREEO, Khorramabad, Iran
10.22034/ijws.2025.135606
Abstract
A factorial experiment was conducted in a completely randomized design with three replications at the Islamic Azad University of Neyshabur to investigate the impact of varying concentrations of metsulfuron-methyl + sulfosulfuron herbicides, under conditions of both organic matter application and non-application, on the growth and biochemical characteristics of mung bean
(Vigna radiata L.). The experimental treatments consisted of six concentrations of the metsulfuron-methyl + sulfosulfuron herbicide (0, 10, 15, 20, 25, and 30 g a.i. ha-1, corresponding to 0, 20, 30, 40, 50, and 60 µg per pot containing 4.5 kg of soil, respectively) and two levels of soil organic matter (application of 4% organic matter and non-application). Physiological and biochemical characteristics, including chlorophyll a and b, carotenoids, proline, catalase, superoxide dismutase, peroxidase, and acetolactate synthase (ALS) activity, were assessed 45 days post-plant emergence (start of flowering). The findings indicated that the assessed leaf indices including chlorophyll a and b, carotenoids, proline, catalase, peroxidase, and ALS activity were significantly (p< 0.01) influenced by the concentration of metsulfuron-methyl + sulfosulfuron. Increasing the herbicide concentration in the soil led to a reduction in chlorophyll a and b, carotenoids, catalase, peroxidase, and ALS activity, with a significant rise in leaf proline levels. The herbicide concentration also significantly affected proline, catalase, peroxidase, and ALS activity in the roots. Increasing the herbicide concentration resulted in an increase in proline and root catalase levels, while concurrently decreasing root peroxidase and ALS activity. The results indicate that metsulfuron-methyl + sulfosulfuron induces oxidative stress in mung bean. Consequently, considering the detrimental effects of this herbicide, mung bean exhibits sensitivity to it, which must be taken into account in chemical weed control of this crop.
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