Articles
Black knot resistance in plums: a multi-omic approach to address genetic resistance for an unusual disease
Article number
1450_29
Pages
221 – 230
Language
English
Abstract
Black knot is a serious cancer of plums.
It is caused by a fungus Apiosporina morbosa. Since the disease takes multiple seasons to develop fully, there is no known in vitro assay to check for resistance.
Thus, the existence of genetic resistance is either unavailable or analyzed properly.
We used a multi-pronged ‘omics’ based approach to understand the mechanism of resistance in a genetically diverse population of Japanese and European plums, which were left to allow BK infestation to flourish in the orchard.
Phytohormone analyses of the black knot disease and progression suggested that auxin-cytokinins interplay, possibly driven by A. morbosa is vital in disease progression by hampering the plant defense system.
Further, contrary to the conventional reports, both salicylic acid and jasmonic acid levels were elevated in the susceptible genotypes, the reason for which is being currently investigated.
Collectively our results have made significant progress in our understanding black knot in plums and the possibility of a genetic, and hormonomic marker to identify BK resistance is closer.
It is caused by a fungus Apiosporina morbosa. Since the disease takes multiple seasons to develop fully, there is no known in vitro assay to check for resistance.
Thus, the existence of genetic resistance is either unavailable or analyzed properly.
We used a multi-pronged ‘omics’ based approach to understand the mechanism of resistance in a genetically diverse population of Japanese and European plums, which were left to allow BK infestation to flourish in the orchard.
Phytohormone analyses of the black knot disease and progression suggested that auxin-cytokinins interplay, possibly driven by A. morbosa is vital in disease progression by hampering the plant defense system.
Further, contrary to the conventional reports, both salicylic acid and jasmonic acid levels were elevated in the susceptible genotypes, the reason for which is being currently investigated.
Collectively our results have made significant progress in our understanding black knot in plums and the possibility of a genetic, and hormonomic marker to identify BK resistance is closer.
Publication
Authors
J. Subramanian, R. Shinde, C. Shum, W. El Kayal, M.M. Ayyanath, M. Shukla, P. Saxena
Keywords
Apiosporina morbosa, black knot, phytohormones, histology, electron microscopy
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