Record ID No. |
5867 |
Author(s) |
Kumari S. M. P.* and Srimeena N.** , 2019 |
Affiliation |
*Department of Plant Breeding and Genetics, AC&RI, Killikulam, Tamil Nadu, India. **Department of Agricultural Microbiology, AC&RI, Madurai, Tamil Nadu, India. |
Title |
Arbuscular Mycorrhizal Fungi (AMF) induced defense factors against the damping-off disease pathogen, Pythium aphanidermatum in Chilli (Capsicum annum). |
Source. Vol.(no):Page |
International Journal of Current Microbiology and Applied Sciences. 8(6): 2243-2248.. |
Categories |
|
Subjects |
Biochemistry Biological Interaction |
Sub-subjects |
Pathogenic fungi |
Host |
Capsicum annum |
Organism |
Pythium aphanidermatum |
Country |
India |
Abstracts |
Arbuscular Mycorrhizal Fungi (AMF) from the small phylum Glomeromycota forms
symbiotic association with the roots of higher plants. The AMF appears to benefit by improving the uptake of phosphate and other nutrients from soil and also increases the disease tolerance to the host plant. Mycorrhizal plants produce certain substances that have been indicated as copartners in resistance to the attack of root pathogens. The GC-MS analysis of root and leaf samples of AMF inoculated plants of chilli infected with the damping off disease pathogen, Pythium aphanidermatum, a tripartite interaction (chilliAMF-pathogen) indicated the presence of compounds such as carboxy-1-methyl-2-
azetidione, 1,2-cyclobutanedicarboxylic acid, tetra hydrogeranyl-2-methyl butyrate, 1, 2-
benzenedicarboxylic acid and benzaldehyde that are reported as potential defense factors
by various authors. Fatty acids with antimicrobial properties are also detected in both leaf and root samples of AMF inoculated chilli plants infected by damping-off pathogen.
Dibutyl phthalate is a bioactive compound that was present at high level in leaf samples of AMF treated plants. Shahamin-B, a diterpenoid with anti-feedant properties was detected
in chilli leaves due to AMF treatment. The results clearly reveal that the defense factors were induced by the mycorrhizal plants at higher level compared to non-mycorrhizal
plants that in turn hinder the establishment of the pathogen. This strategy occurring in crop
plants due to AMF colonization in roots is documented to prevent the incidence of pathogen attack, thereby enhancing the growth and yield of crop plants. |