Changes of antioxidant enzymes of mung bean [Vigna radiata (L.) R. Wilczek] in response to host and non-host bacterial pathogens

Abstract

Abstract:The natural resistance against the majority of potential pathogens that exist in most plant species is known as non-host resistance. Several reports suggest the role of antioxidant enzymes in non-host resistance. We assayed the expression or activity of four scavenging enzymes during non-host pathogen-plant interaction (Xanthomonas hortorum pv. pelargonii/mung bean) and host pathogen-plant interaction (Xanthomonas axonopodis pv. phaseoli/mung bean). The expression of superoxide dismutase (SOD) and ascorbate peroxidase (APX) and the enzyme activity of catalase (CAT) and peroxidase (POX) were investigated. The activities of CAT and POX were higher during non-host pathogen invasion vs. host pathogen attack. The expression of SOD and APX were also different between compatible and incompatible interactions. The expression of SOD and APX were higher in the incompatible compared to the compatible interaction. Additionally, induction of the antioxidant enzymes in response to non-host pathogen was earlier than induction in response to host pathogen. Such information is important for plant breeders, and useful when looking for alternative control strategies as well.

Reactive Oxygen Species Activity and Antioxidant Properties of Fusarium Infected Bananas

“…; Chen et al. ; Farahani and Taghavi ). Similarly, GPX has also been observed to increase in plants that are infected such as sunflowers infected by downy mildew (Herbette et al.…”

“…Therefore, we directly attribute the higher ROSscavenging enzyme activity in infected samples to the higher ROS radical activities in infected samples. Ascorbate peroxidase activity has been shown to increase in plants infected by pathogens such as apricot, wheat and mung bean (Hern andez et al 2001;Chen et al 2015;Farahani and Taghavi 2016a). Similarly, GPX has also been observed to increase in plants that are infected such as sunflowers infected by downy mildew (Herbette et al 2003).…”

Perspectives and Challenges for Sustainable Management of Fungal Diseases of Mungbean [Vigna radiata (L.) R. Wilczek var. radiata]: A Review

“…Higher levels of PO and PPO activity was observed in M. phaseolina infection treated with the bioformulation combination of plant growth promoting bacteria (P. fluorescens) and biocontrol agents (Trichoderma or Bacillus) than the plants treated with single biocontrol agent (Thilagavathi et al, 2007). Mechanism of SAR were studied for bacterial (Dutta et al, 2005;Farahani and Taghavi, 2016) and viral diseases (Rashid et al, 2004) of mungbean, but study regarding fungal diseases are still meager. Thus, more investigations are required to understand the SAR and ISR mechanisms in the interactions between mungbean and fungal diseases.…”

Comparative Effects of Azospirillum brasilense Sp245 and Pseudomonas aeruginosa PAO1 Lipopolysaccharides on Wheat Seedling Growth and Peroxidase Activity

“…POD activity is stimulated by both bacterial plant pathogens (Farahani and Taghavi 2016;Jang et al 2004) and beneficial rhizobacteria (Lavania et al 2006), but less is known about how LPS from these bacteria affect POD activity. Here we compared the effect of LPS on POD activity and found that while both types of LPS increased POD activity, LPS from the pathogenic bacteria were associated with larger increases in POD activity, suggesting that plants may be able to distinguish between LPS from PGPR and bacterial pathogens.…”