the chemical compound dl-?-amino-n-butyric acid (baba) has been introduced as a promoter of induction of resistance in plants against plant pathogens. in this study, promotion of induction of some such defense compounds as peroxidase and polyphenol oxidase enzymes through dl-?-amino-n-butyric acid application against root knot nematode (meloidogyne javanica) was investigated in cucumber. result...

In order to investigate the effects of water stress on total phenolics content, antioxidant power, β-glucosidase activity and stomatal properties of alfalfa, a factorial experiment based on randomized complete block design was carried out in 1-Lit pots containing half strength Hoagland culture medium using two cultivars of alfalfa at four osmotic pressures including 0 (control), -0.5, -1.0 and ...

Polyphenol oxidase is the popular enzyme involved in fruit-vegetable browning and melanin synthesis. In present paper, L-3-phenyllactic acid, a natural bacteriostatic substance, was investigated as an inhibitor of polyphenol oxidase. The results were demonstrated that residual activity decreased gradually with increase concentration acid. L ΔE values reaction system increased gradually. reversi...

in this study, biocontrol effect of some strains pseudomonas fluorescent surveyagainst pythium aphanidermatum the causal agent of cucumber root rot disease. first biocontrol ability of bacteria against the fungal pathogen evaluated by cross-culture method. results showed that inhibition zone of strain t17-4 (7.5 mm) was more than others. seven strains including t17-4, cha0, cha89, vupf52, vupf5...

abstractbackground and objectives: the cultivated tobacco (nicotiana tabacum) is a tropical and annual plant, consisting of a number of species or hybrids belonging to the solanaceae family. bio-chemical reaction to viral infection is different for various plants .one of the most important defensive mechanisms of the host plant against pathogen agents, is biochemical defense and their related c...