Floral malformation in pearl millet due to downy mildew infection leads to changes in the metabolite profiles in inflorescence florets
Keywords:
Plant hormones, metabolites, Gibberellic acid, Salicylic acid, Sclerospora graminicola, inflorescenceAbstract
Pearl millet [Pennisetum glaucum (L.) R. Br.] is an important cereal and forage crop in arid and subtropical regions of the Indian subcontinent as well as several African regions. One of the major constraints for its production is the ‘green ear’ or ‘downy mildew’ disease caused by the oomycetous, biotrophic, obligate pathogen Sclerospora graminicola (Sacc.) Schroet. wherein extensive floral malformation leads to conversion of inflorescence to vegetative structures. To understand the mechanism of this malformation in the present study the comparative metabolite profiling was carried out. The metabolites from florets of normal and malformed inflorescence were extracted and subjected to HRLC-MS/MS and HRGC-MS/MS analysis to identify the different metabolites present. The results indicate several secondary metabolites as well as phytohormones such as salicylic acid and gibberellic acid to be present in different levels in these two florets indicating their possible roles in the process of floral malformation in pearl millet.
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Copyright (c) 2023 J Samanth Kumar, Dr. Shailasree Sekhar, Dr. K Ramachandra Kini
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