The Effect of Field Dodder (Cuscuta campestris Yunck.) on Morphological and Fluorescence Parameters of Giant Ragweed (Ambrosia trifida L.)

Abstract

The effect of the parasitic flowering plant known as field dodder (Cuscuta campestris Yunck.) on morphological and fluorescence parameters of infested giant ragweed (Ambrosia trifida L.) plants was examined under controlled conditions. The parameters of chlorophyll fluorescence (Fo, Fv/Fm, ΦPSII, Fv, Fm, ETR and IF) were measured on infested (I) and non-infested (N) A. trifida plants over a period of seven days, beginning with the day of infestation. Morphological parameters (plant height, dry and fresh weight) were measured on the last day of fluorescence measurements. C. campestris was found to affect the height, fresh and dry weight of the infested A. trifida plants, causing significant reduction in plant height and dry weight. Field dodder also affected several parameters of chlorophyll fluorescence (Fo, Fv/Fm, ΦPSII and Fv) in infested A. trifida plants.

Ispitivan je uticaj parazitske cvetnice viline kosice (Cuscuta campestris Yunck.) na morfološke i parametre fluorescencije kod zaraženih biljaka ambrozije trolisne (Ambrosia trifida L.) u kontrolisanim uslovima. Parametri fluorescencije (Fo, Fv/Fm, ΦPSII, Fv, Fm, ETR i IF) kod zaraženih (Z) i nezaraženih (N) biljaka A. trifida su mereni sedam dana, počev od prvog dana nakon zaražavanja. Morfološki parametri (visina biljaka, suva i sveža masa biljaka) su mereni poslednjeg dana merenja fluorescencije. C. campestris je uticala na visinu, svežu i suvu masu zaraženih biljaka A. trifida, pri čemu je dovela do značajne redukcije visine i suve mase biljaka. Takođe, vilina kosica je uticala na veći broj parametara fluorescencije hlorofila (Fo, Fv/Fm, ΦPSII i Fv) kod zaraženih biljaka A. trifida.