التفاصيل البيبلوغرافية
| العنوان: |
Antioxidant detoxification system of wheat and ryegrass plants subjected to various herbicides. |
| Alternate Title: |
Sistema de desintoxicação antioxidante de plantas de trigo e azevém submetidas a diversos herbicidas. |
| المؤلفون: |
Peligrinotti Tarouco, Camila1, da Rosa Ulguim, André1 andre.ulguim@ufsm.br, André Nohatto, Marcos2, Manica-Berto, Roberta3, Antonio de Avila, Luis3, Senseman, Scott Allen4, Agostinetto, Dirceu3 |
| المصدر: |
Ciência Rural. 2024, Vol. 54 Issue 7, p1-9. 9p. |
| مصطلحات موضوعية: |
*RYEGRASSES, *WHEAT, *HERBICIDES, *LOLIUM perenne, *HYDROGEN peroxide, *OXIDATIVE stress, *ANTIOXIDANTS |
| Abstract (English): |
Herbicide promotes physiological and biochemical changes even in tolerant species. The objective of this study was to evaluate the interference of the herbicides clodinafop-propargyl and 2,4-D in the antioxidant system of wheat, and iodosulfuron-methyl in wheat and ryegrass. Two studies, divided into three experiments, were conducted in an entirely randomized design in a greenhouse and phytotron. The first study tested herbicides iodosulfuron-methyl, clodinafop-propargyl, 2,4-D, and a control without application in wheat. The second, divided into two experiments with wheat and ryegrass, tested iodosulfuron-methyl doses (0, 1.75, 3.5, and 7.0 g a.i. ha-1). The variables analyzed were the concentrations of chlorophylls a, b, carotenoids, hydrogen peroxide (H2O2), lipid peroxidation (TBARS), electrolyte leakage, and antioxidant system activity. The herbicide treatments iodosulfuron-methyl, clodinafop-propargyl, and 2,4-D decreased the concentrations of chlorophylls and carotenoids in wheat plants. The herbicides promoted oxidative stress with increased H2O2 and TBARS concentrations. Increasing the dose of iodosulfuron-methyl provided a reduction in the activity of the enzymatic antioxidant system in wheat and ryegrass. [ABSTRACT FROM AUTHOR] |
| Abstract (Portuguese): |
A aplicação de herbicidas promove alterações fisiológicas e bioquímicas mesmo nas espécies tolerantes. O objetivo do estudo foi avaliar a interferência dos herbicidas clodinafop-propargyl e 2,4-D no sistema antioxidante do trigo, e iodosulfuron-methyl em trigo e azevém. Dois estudos, divididos em três experimentos, foram conduzidos em delineamento inteiramente casualizado em casa de vegetação e fitotron. O primeiro estudo testou os herbicidas iodosulfuron-methyl, clodinafop-propargyl, 2,4-D, e testemunha sem aplicação em trigo. O segundo, dividido em dois experimentos com trigo e azevém, testou doses de iodosulfuron-methyl doses (0, 1,75, 3,5, and 7,0 g i.a. ha-1). As variáveis analisadas foram as concentrações de clorofilas a, b, carotenoides, peróxido de hidrogênio (H2O2), peroxidação lipídica (TBARS), extravazamento de eletrólitos e atividade do sistema antioxidante. O uso dos herbicidas iodosulfuron-methyl, clodinafop-propagyl e 2,4-D diminuíram o teor de clorofilas e carotenoides nas plantas de trigo. Os herbicidas promovem estresse oxidativo com aumento no teor de H2O2, TBARS e extravasamento de eletrólitos. O aumento da dose do iodosulfuron-methyl proporciona redução da atividade do sistema antioxidante enzimático no trigo e azevém. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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