Inoculation with Septoglomus constrictum improves tolerance to heat shock in tomato plants

• DOI: 10.18380/szie.colum.2018.5.2.7
• Publication Date: 2019-01-12T04:07:58Z
• Authors: Nguyen Hong Duc; Katalin Posta
• Keywords: Malondialdehyde

Arbuscular mycorrhizal fungi (AMF) are symbiotic soil colonizing roots of about 80% vascular plants. This symbiosis enhances the growth and survival numerous plant species including vegetables; moreover, it offers some other benefits for work aimed to study impact AMF on tomato tolerance heat shock. Tomato (Solanum lycopersicum L.) plants inoculated or not with Septoglomus constrictum were placed in a commercial potting media at 26/22°C 16/8h photoperiod six weeks, then exposed normal (26°C 6h) high temperature (42°C 6h). (AM) colonization rate, level lipid peroxidation (malondialdehyde – MDA), hydrogen peroxide (H2O2) accumulation antioxidative enzymes leaves measured after stress application. AM rate was 73% under non-stress conditions 68% shock while no found non-AM treatments. MDA H2O2 content substantially increased all exposure Leaf root peroxidase (POD), leaf catalase (CAT) superoxide dismutase (SOD) activities enhanced compared those ones activity SOD CAT remained unchanged. Furthermore, there significant decreases conditions. Our results indicate that inoculation can increase against by enhancing enzymes. Further research is required understand mechanisms contribute tolerance.