نویسندگان
1 دانش آموخته کارشناسی ارشد
2 دانشگاه محقق اردبیلی
3 استادیار پژوهشی بخش تحقیقات گیاهپزشکی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان همدان، سازمان تحقیقات، آموزش و ترویج
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Chlorophyll a fluorescence is a reliable physiological indicator for determining changes induced in the photosynthetic system and can be altered by various factors that are indirectly involved in photosynthesis. Two greenhouse experiments were conducted to study the effect of salicylic acid (SA) in combination with premixed herbicides including iodosulfuron-methyl + mesosulfuron-methyl sodium + diflufenican (Othello) and pinoxaden + flurasolam (Axial One) on chlorophyll a fluorescence parameters of wild mustard (Sinapis arvensis). The results showed that application of both herbicides decreased the maximum fluorescence (Fm) and the maximum photochemical efficiency of photosystem II (Fv/Fm), while increasing the minimum fluorescence (Fo). Application of Othello at a rate of 528 g a.i. ha⁻¹ resulted in a 30.78% reduction in the Fv/Fm ratio, whereas application of Axial One at 300 g a.i. ha⁻¹ caused a 72.30% reduction, compared to the untreated control (without herbicide and salicylic acid), seven days after herbicide application. Correlation analysis revealed significant relationships between chlorophyll a fluorescence parameters (Fm and Fv/Fm) and weed dry weight under different herbicide treatments. In contrast, minimum fluorescence (F₀) showed a negative correlation with dry weight, with the strongest negative relationship observed under the Axial One treatment. Overall, all herbicide treatments significantly reduced the dry weight of wild mustard, while the application of salicylic acid had no detectable effect on herbicide efficacy.
کلیدواژهها [English]
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