Biochemical profiling of resistance in citrus germplasm against citrus canker
Muhammad Atiq, Nasir Ahmed Rajput, Akhter Hameed, Muhammad Younas,
Yasir Ali, Waqas Ahmed, Hira Aslam and Muhammad Ashfaq
University of Agriculture Faisalabad, Pakistan
: J Plant Physiol Pathol
Abstract
Citrus canker (Xanthomonas axonopodis pv. citri (Xac)) is one of the most destructive diseases responsible for causing heavy economic losses by affecting the quality and quantity of produce. So far very little work has been done regarding oxidative metabolism of citrus and its role in resistance and susceptibility against citrus canker. In present study ten citrus cultivars (Jaffa, Tangerine, Musambi, Kinnow, Feutarl’s early, Mayer lime, Sweet lime, Grape fruit, Blood red and china lemon) were artificially inoculated with Xac and biochemical alterations were estimated ten days after inoculation and these changes were compared with un-inoculated leaves. Biochemical analysis of Catalase (CATs), Peroxidases (PODs), Superoxide Dismutase (SOD), hydrogen per oxide (H2O2) and total soluble proteins were performed. The results indicated that activity of these parameters increased in inoculated leaves among all these cultivars while level of total soluble proteins decreased in inoculated leaves. However, variations in these factors in response to Xac were genotypedependent and these fluctuations might be interlinked with resistance and susceptibility of citrus cultivars. The investigations of this research are helpful for researchers and breeders to develop resistant cultivars by understanding and manipulating the changes in oxidative metabolism.
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