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   how photosynthetic light phase of spiny cocklebur (xanthium spinosum l.) changes during times after herbicide application?  
   
نویسنده hassannejad sirous ,porheidarghafarbi soheila ,lotfi ramin
منبع journal of plant physiology and breeding - 2020 - دوره : 10 - شماره : 1 - صفحه:61 -70
چکیده    the photosynthetic light phase of spiny cocklebur (xanthium spinosum l.) plant was studied by jip-test at different times (12, 36, 60 and 84 hours) after the application of nicosulfuron (®cruz) and bentazon (®basagran) herbicides. results indicated that the application of nicosulfuron did not affect most of the chlorophyll a fluorescence (chlf) parameters. but, the application of bentazon significantly decreased psii activity due to increasing f0 and decreasing fm, fv, fv/f0 and especially fv/fm. the maximum effect of bentazon was observed on the donor side of psii by increasing abs/rc and decreasing tro/rc and also by reduction of φe0. reduction in photosynthesis relative vitality (pi) of photosynthesis apparatus by bentazon affected photosystem ii (psii) reaction centers, fv/fm and φe0. the highest negative effect of bentazon on psii activity was recorded at 36 hours after herbicide application. bentazon via increasing kp, decreased electron transportation.
کلیدواژه bentazon ,chlorophyll a fluorescence ,electron transport ,jip-test ,nicosulfuron ,spiny cocklebur
آدرس university of tabriz, department of plant eco-physiology, iran, education and extension organization (areeo), dryland agricultural research institute, iran, education and extension organization (areeo), dryland agricultural research institute, iran
پست الکترونیکی r.lotfi1988@gmail.com
 
 

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