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Differential gene regulatory pathways and co-expression networks associated with fire blight infection in apple(Malus×domestica)

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Horticulture Research 2019年第1期6卷 1116-1128页

作者： katchen julliany pereira silva Jugpreet Singh Ryland Bednarek Zhangjun Fei Awais Khan Plant Pathology and Plant-Microbe Biology Section Cornell UniversityGenevaNY 14456USA Boyce Thompson Institute Cornell UniversityIthacaNY 14853USA

Apple cultivars with durable resistance are needed for sustainable management of fire blight,the most destructive bacterial disease of *** studies have identified genetic resistance to fire blight in both wild species and cultivated apples,more research is needed to understand the molecular mechanisms underlying host–pathogen interaction and differential genotypic responses to fire blight *** have analyzed phenotypic and transcriptional responses of‘Empire’and‘Gala’apple cultivars to fire blight by infecting them with a highly aggressive *** *** progress,based on the percentage of visual shoot necrosis,started showing significant(p<0.001)differences between‘Empire’and‘Gala’4 days after infection(dai).‘Empire’seems to slow down bacterial progress more rapidly after this *** further compared transcriptome profiles of‘Empire’and‘Gala’at three different time points after fire blight *** genes showed differential expression in‘Gala’at earlier stages,but the number of differentially expressed genes increased in‘Empire’at 3 *** classes related to defense,cell cycle,response to stress,and biotic stress were identified and a few co-expression gene networks showed particular enrichment for plant defense and abiotic stress response *** of these genes also co-localized in previously identified quantitative trait locus regions for fire blight resistance on linkage groups 7 and 12,and can serve as functional candidates for future *** results highlight different molecular mechanisms for pathogen perception and control in two apple cultivars and will contribute toward better understanding of ***-Malus pathosystem.

关键词： blight cultivar networks

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NPR1 as a transgenic crop protection strategy in horticultural species

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Horticulture Research 2018年第1期5卷 751-761页

作者： katchen julliany P.silva Nasser Mahna Zhonglin Mou Kevin M.Folta Horticultural Sciences Department University of FloridaGainesvilleFL32611USA Department of Horticultural Sciences University of TabrizTabrizIran Department of Microbiology and Cell Science University of FloridaGainesvilleFL32611USA Graduate Program in Plant Molecular and Cellular Biology University of FloridaGainesvilleFL32611USA

The NPR1(NONEXPRESSOR OF PATHOGENESIS RELATED GENES1)gene has a central role in the long-lasting,broad-spectrum defense response known as systemic acquired resistance(SAR).When overexpressed in a transgenic context in Arabidopsis thaliana,this gene enhances resistance to a number of biotic and abiotic *** position as a key regulator of defense across diverse plant species makes NPR1 a strong candidate gene for genetic engineering disease and stress tolerance into other ***-value horticultural crops face many new challenges from pests and pathogens,and their emergence exceeds the pace of traditional breeding,making the application of NPR1-based strategies potentially useful in fruit and vegetable ***,plants overexpressing NPR1 occasionally present detrimental morphological traits that make its application less *** practical utility of NPR-based approaches will be a balance of resistance gains versus other *** this review,we summarize the progress on the understanding of NPR1-centered applications in horticultural and other crop *** also discuss the effect of the ectopic expression of the *** NPR1 gene and its orthologs in crop plants and outline the future challenges of using NPR1 in agricultural applications.

关键词： NPR1 breeding attractive

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