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Metabolomic Changes in Onion Incited with Twister Disease Patil Suresh*, Nargund V.B. Department of Plant Pathology, UAS, Dharwad *Email: sureshpatil007@gmail.com
Online published on 23 December, 2016. Abstract Twister disease has become epidemic on onion crop in the recent years, in coastal tract and major onion growing districts in Karnataka. This disease C. gloeosporioides, F. oxysoprium and M. graminicola are causing heavy yield loss. The metabolomic changes due to infection at different stages by colorimetric assay revealed the reducing sugar, nonreducing sugar and total sugar were higher in 5th grade (8.74, 6.68 and 15.54 mg/g of leaf tissue) whereas, total proteins were higher in 1st grade (9.92 mg/g of leaf tissue). As for as growth regulators are concerned IAA and GA were highest in 3rd grade (16.50 and 3.29 mg/g of leaf tissue). The HPLC analysis of IAA content was higher in 3rd grade diseased leaves which is of 5.14 mg/g of leaf tissue whereas, lowest in healthy seedling stage (2.38 mg/g of leaf tissue). The GA content was higher in 3rd grade diseased leaves were which is of 4.17 mg/g of leaf tissue. Whereas lowest in healthy (3.16 mg/g of leaf tissue). Top Keywords Metabolomic Changes, Twister disease, Onion. Top | |
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