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Open AccessArticle

Histochemical and Microscopic Studies Predict that Grapevine Genotype “Ju mei gui” is Highly Resistant against Botrytis cinerea

1
College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi’an 710119, China
2
Ecological Agricultural Station, Weinan Agricultural Technology Promotion Center, Weinan 714000, Shaanxi, China
3
College of Horticulture, Northwest A&F University, Yangling 712100, China
4
Horticultural Research Institute, National Agricultural Research Center, Islamabad 45500, Pakistan
*
Author to whom correspondence should be addressed.
Pathogens 2020, 9(4), 253; https://doi.org/10.3390/pathogens9040253
Received: 22 February 2020 / Revised: 27 March 2020 / Accepted: 28 March 2020 / Published: 31 March 2020
(This article belongs to the Special Issue Plant Resistance Induced by Microorganisms and Pathogens)
The necrotrophic fungus Botrytis cinerea causes devastating pre- and post-harvest yield losses in grapevine (Vitis vinifera L.). Although B. cinerea has been well-studied in different plant species, there is limited information related to the resistance and susceptibility mechanisms of Vitis genotypes against B. cinerea infection. In the present study, leaves and berries of twenty four grape genotypes were evaluated against B. cinerea infection. According to the results, one genotype (Ju mei gui) was highly resistant (HR), one genotype (Kyoho) was resistant (R), eight genotypes were susceptible (S), and fourteen genotypes were highly susceptible (HS) against infection of B. cinerea in leaves. Whereas in the case of B. cinerea infection in grape berry, three genotypes were found to be highly resistant, three resistant, eleven genotypes susceptible, and seven were highly susceptible. To further explore the mechanism of disease resistance in grapevine, we evaluated “Ju mei gui” and “Summer black” in terms of B. cinerea progression, reactive oxygen species reactions, jasmonic acid contents, and the activities of antioxidant enzymes in leaf and fruit. We surmise that the resistance of “Ju mei gui” is due to seized fungal growth, minor reactive oxygen species (ROS) production, elevated antioxidant enzyme activity, and more jasmonic acid (JA) contents. This study provides insights into the resistance and susceptibility mechanism of Vitis genotypes against B. cinerea. This will help for the selection of appropriate germplasm to explore the molecular basis of disease resistance mechanisms in grapevine. View Full-Text
Keywords: Botrytis cinerea; reactive oxygen species; jasmonic acid; antioxidant enzymes; scanning electron microscope; physiology; “Summer black”; “Ju mei gui” Botrytis cinerea; reactive oxygen species; jasmonic acid; antioxidant enzymes; scanning electron microscope; physiology; “Summer black”; “Ju mei gui”
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Rahman, M.U.; Ma, Q.; Ahmad, B.; Hanif, M.; Zhang, Y. Histochemical and Microscopic Studies Predict that Grapevine Genotype “Ju mei gui” is Highly Resistant against Botrytis cinerea. Pathogens 2020, 9, 253.

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