Ascochyta rabiei Infections Modify Expression of Chickpea Invertase Genes Differentially in Contrasting Genotypes
Keywords:
Ascochyta blight, <i>Cicer arietinum</i>, cell wall invertase, vacuolar invertase, alkaline/neutral invertase, gene expression, <i>Ascochyta rabiei</i>Abstract
Sucrose is the main form of assimilated carbon and energy source in plants. Sucrose in sink tissues is hydrolyzed by invertases to glucose and fructose that act as major carbon molecules for plant metabolism. Initial studies in some crops suggested role of invertases in plant disease resistance however, no information on these genes is available for chickpea biotic stresses. To identify the role of invertases in resistance/susceptibility to ascochyta blight (causal organism: Ascochyta rabiei) in chickpea, expression of six invertase genes (two cell wall invertases, one vacuolar invertase and three alkaline/neutral invertases) was evaluated in A. rabiei infected susceptible (GPF2) and resistant (HC1) genotypes of chickpea. Of these six gene, only one overexpressed in susceptible GPF2 whereas in resistant HC1 five genes overexpressed. The study suggested that down regulation of invertase genes was associated with susceptibility of chickpea to A. rabiei whereas over expression was associated with resistance.Downloads
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