11993

10996

كارشناسي ارشد

زراعت

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1395

سيزده، 112ص.: مصور، جدول، نمودار

ص. ع. به فارسي و انگليسي

حسن كريم مجني، جمشيد رزمجو

پرويز احسان زاده

محمدحسين اهتمام، جهانگير خواجه علي

1395/10/20

كتابنامه

كشاورزي

مهندسي كشاورزي

ID10996

111Evaluation of Valeriana officinalis Toleranc to the Herbicide Bentazon Affected by Salicylic Acid Pretreatment Mahsa Khatooni M khatooni@ag iut ac ir December 2016 Department of Agronomy and Plant Breeding Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiSupervisors H Karim Mojeni Kmojeni@cc iut ac ir J Razmjo krazmjoo@cc iut ac irAbstractValeriana Valeriana officinalis L is one of the oldest and most valuable medicinal plants in the world Despite the long history of cultivation of this plant the problem of weed control in this plant is notresolved There is no selective herbicide for control of weeds of Valeriana yet In addition there havebeen no reports of salicylic acid SA effect alone or in combination with herbicides on Valeriana So thisresearch was conducted to test the hypothesis that pretreatment with SA would enhance the ability ofValeriana plants to tolerate bentazon herbicide The experiment was carried out as a factorial based oncompletely randomized design with three replications Experimental treatments were three SAconcentrations 0 0 5 and 1 Mm and six levels of bentazon herbicide 0 0 50X 0 75X X 1 25X and1 5X X being equal to the recommended dose 0 44 kg active ingredient ha 1 The Valeriana plant traitsincluding herbicide phytotoxicity the relative leaf water content RWC chlorophyll a chlorophyll b chlorophyll a b and total carotenoid contents malondialdehyde MDA levels antioxidant enzymeactivities including ascorbate peroxidase APX catalase CAT guaiacol peroxidase GPX shoot androot dry weights plant height and essential oil content were assessed Single treatment of bentazon inrecommended and increased dosage caused significant decreases in root and shoot dry weight RWC chlorophyll a b and carotenoid concentrations and also increase in herbicide pytotoxicity CAT GPXenzyme activities and MDA content When SA treated Valeriana plant were exposed to bentazon all ofthe above mentioned plant traits were improved suggesting that bentazon induced oxidative stress wasdiminished SA pretreatment 0 5 Mm had a strong effect on maintaining RWC increasing of root drymatter preventing chlorophyll and carotenoid degradation Results of this experiment showed thatexogenous application of salicylic acid can alleviate the toxic effects of herbicide in Valeriana Amaranthus retroflexus behaved differently from Valeriana in that SA pretreatment along with bentazonapplication in recommended and higher doses had more efficiency in controlling this noxus weed specis Keywords Valeriana oxidative stress Bentazon Salicylic acid Amaranthusretroflexus

حسن كريم مجني، جمشيد رزمجو

پرويز احسان زاده

محمدحسين اهتمام، جهانگير خواجه علي