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http://krishi.icar.gov.in/jspui/handle/123456789/67913| Title: | Induction and antifungal activities of 3-deoxyanthocyanidins phytoalexin compounds as host response against invading Colletotrichum falcatum in sugarcane |
| Other Titles: | Not Available |
| Authors: | Nandakumar M., R. Viswanathan, P. Malathi, A. Ramesh Sundar |
| ICAR Data Use Licennce: | http://krishi.icar.gov.in/PDF/ICAR_Data_Use_Licence.pdf |
| Author's Affiliated institute: | ICAR::Sugarcane Breeding Institute |
| Published/ Complete Date: | 2018-09-03 |
| Project Code: | Not Available |
| Keywords: | Sugarcane, red rot, resistance, 3-deoxyanthocyanidin phytoalexin |
| Publisher: | ICAR - Sugarcane Breeding Institute , Coimbatore., SSRD, Coimbatore |
| Citation: | Not Available |
| Series/Report no.: | Not Available; |
| Abstract/Description: | The fungal disease red rot, caused by Colletotrichum falcatum, causes severe yield loss and poor juice quality of sugarcane, thereby leading to economic loss and elimination of many elite sugarcane varieties especially in the Asian continent. The resistance mechanism of sugarcane is complex to understand due to its polyploidy nature. Previous studies on this host-pathogen interaction revealed the expression of various transcripts involved in the flavonoid biosynthesis pathway and the differential accumulation of 3-deoxyanthocyanidin phytoalexin compounds as a result of the defense response. To further establish the role of phytoalexin accumulation in host defense, HPLC studies were carried out. The results clearly showed the differential accumulation of 3-deoxyanthocyanidin compounds including apigeninidin, luteolinidin, cyanidin and some uncharacterized compounds, in varying concentrations corresponding to the clones resistance to the pathogen. Accumulation of phytoalexin compounds had a direct role in restricting the pathogen progression in the host tissue. Conidial germination assays carried out with the HPLC fractions showed that luteolinidin fraction inhibits germ tube elongation and appressorium formation. The results indicate that induction and accumulation of phytoalexins compounds during host-pathogen interaction leads to restriction of pathogen progression in resistant varieties. The role of these compounds will be studied in detail using mass spectrometric technique and their specific function characterized in future studies |
| Description: | Not Available |
| ISBN: | Not Available |
| Type(s) of content: | Proceedings |
| Sponsors: | Not Available |
| Language: | English |
| Name of Journal: | Not Available |
| Volume No.: | Not Available |
| Page Number: | 87 |
| Name of the Division/Regional Station: | Division of crop protection |
| Source, DOI or any other URL: | Not Available |
| URI: | http://krishi.icar.gov.in/jspui/handle/123456789/67913 |
| Appears in Collections: | CS-SBI-Publication |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| ISSCT nanda 2018.pdf | 423.91 kB | Adobe PDF | View/Open |
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