TOLERANCE TO HEAT STRESS AND ANTHRACNOSE IN MYCORRHIZAL CYCLAMEN
Cyclamen (Cyclamen persicum Mill.) is one of the most popular ornamental potted plants in many parts of the world that is intolerant to high temperature stress and susceptible to diseases. Nowadays, arbuscular mycorrhizal fungi (AMF) has drawn considerable attention as an effective biocontrol agent for many plant species; however, adequate research is yet to be reported for its effects on heat stress and anthracnose disease tolerance in cyclamen. Thus, an experiment was conducted in greenhouse to study the growth and development of cyclamen with inoculation of AMF and tolerance to anthracnose caused by Colletotrichum gloeosporioides (Cg) under high temperature condition in summer. In this study, four inoculants of AMF including Gigaspora margarita (GM), Glomus mosseae (Gm), Glomus intraradices (Gi), Glomus fasciculatum (Gf) were used in Piccolo cyclamen. During the production period, temperature of greenhouse air and pot soil was recorded and the highest temperatures were 40.2 and 36.5°C, respectively. Data were collected before and after high temperature condition and Cg inoculation. Among the four AMF inoculants, higher biomass was observed both before and after high temperature stress for Gf and Gm associated plants. The disease incidence found less in GM+Cg and Gi+Cg inoculated plants and the severity level of incidence was also in low level (~20%) in most of the AMF-inoculated plants than the control plants. Thus, the findings indicated that AMF association had the ability to enhance the growth of cyclamen under heat stress condition and could decrease the anthracnose incidence in cyclamen production.
Maya, M.A., Ito , M. and Matsubara, Y. (2014). TOLERANCE TO HEAT STRESS AND ANTHRACNOSE IN MYCORRHIZAL CYCLAMEN. Acta Hortic. 1025, 143-148
AMF, biocontrol, Colletotrichum gloeosporioides, growth promotion, symbiosis