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      • KCI등재

        Different oxidative burst patterns occur during host and nonhost resistance responses triggered by Xanthomonas campestris in pepper

        곽연식,Ki Soo Han,이정한,이경희,정우식,Kirankumar S. Mysore,권영상,김희규,Dong-Won Bae 한국식물생명공학회 2009 식물생명공학회지 Vol.36 No.3

        The hypersensitive reaction (HR) is the mostcommon plant defense reaction against pathogens. HR isproduced during both host- and nonhost-incompatible interactions. Several reports suggest that similarities existbetween host and nonhost resistances. We assayed the patternof generation of reactive oxygen species (ROS) and scavengingenzyme activities during nonhost pathogen-plantinteractions (Xanthomonas campestris pv. campestris/Capsicumannuum L.) and incompatible host pathogen-plant interactions(Xanthomonas campestris pv. vesicatoria race1/Capsicumannuum L.). Both O2- and H2O2 accumulated much fasterduring nonhost resistance when compared to the hostresistance. The scavenging enzyme activities of superoxidedismutase (SOD), catalase (CAT) and peroxidase (POX)were also different during the host- and nonhost-incompatibleinteractions. CAT activity was much higher during nonhost resistance, and several new isozymes of SOD and POX weredetected during nonhost resistance when compared to thehost resistance. Lipoxygenase (LOX) activity was higher inhost resistance than nonhost resistance during the earlystages of infection. Interestingly, the nitric oxide (NO) radicalaccumulated equal amounts during both host and nonhostresistance at early stages of infection. Further studies areneeded to determine the specific pathways underlying thesedifferences between host and nonhost resistance responses.

      • KCI등재

        Different oxidative burst patterns occur during host and nonhost resistance responses triggered by Xanthomonas campestris in pepper

        Kwak, Youn-Sig,Han, Ki-Soo,Lee, Jung-Han,Lee, Kyung-Hee,Chung, Woo-Sik,Mysore, Kirankumar S.,Kwon, Young-Sang,Kim, Hee-Kyu,Bae, Dong-Won The Korean Society of Plant Biotechnology 2009 식물생명공학회지 Vol.36 No.3

        The hypersensitive reaction (HR) is the most common plant defense reaction against pathogens. HR is produced during both host- and nonhost-incompatible interactions. Several reports suggest that similarities exist between host and nonhost resistances. We assayed the pattern of generation of reactive oxygen species (ROS) and scavenging enzyme activities during nonhost pathogen-plant interactions (Xanthomonas campestris pv. campestris/Capsicum annuum L.) and incompatible host pathogen-plant interactions (Xanthomonas campestris pv. vesicatoria race1/Capsicum annuum L.). Both ${O_2}^-\;and\;H_2O_2 $ accumulated much faster during nonhost resistance when compared to the host resistance. The scavenging enzyme activities of superoxide dismutase (SOD), catalase (CAT) and peroxidase (POX) were also different during the host- and nonhost-incompatible interactions. CAT activity was much higher during nonhost resistance, and several new isozymes of SOD and POX were detected during nonhost resistance when compared to the host resistance. Lipoxygenase (LOX) activity was higher in host resistance than nonhost resistance during the early stages of infection. Interestingly, the nitric oxide (NO) radical accumulated equal amounts during both host and nonhost resistance at early stages of infection. Further studies are needed to determine the specific pathways underlying these differences between host and nonhost resistance responses.

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