Title of article
How photosynthetic light phase of spiny cocklebur (Xanthium spinosum L.) changes during times after herbicide application?
Author/Authors
Hassannejad ، Sirous Department of Plant Eco-Physiology - University of Tabriz , Porheidarghafarbi ، Soheila Dryland Agricultural Research Institute - Education and Extension Organization (AREEO) , Lotfi ، Ramin Dryland Agricultural Research Institute - Education and Extension Organization (AREEO)
From page
61
To page
70
Abstract
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.
Keywords
Bentazon , Chlorophyll a fluorescence , Electron transport , JIP , test , Nicosulfuron , Spiny cocklebur
Journal title
Journal of Plant Physiology and Breeding
Journal title
Journal of Plant Physiology and Breeding
Record number
2575940
Link To Document