Dataset Information

Hsp17.4 mediates salicylic acid and jasmonic acid pathways in the regulation of resistance to strawberry anthracnose

ABSTRACT: Our previous study found that the expression of HSP17.4 is closely related to the occurrence of strawberry anthracnose. In this study, we used virus-mediated gene silencing technology and found that the HSP17.4 gene-silenced ‘Sweet Charlie’ plants were more susceptible to Colletotrichum gloeosporioides than the wild type ‘Sweet Charlie’, and the level of infection was even higher than that of the susceptible cultivar ‘Benihopp’. The results of differential quantitative proteomics showed that after infection with the pathogen, the expression of the downstream response genes NPR1, TGA and PR-1 of the salicylic acid (SA) signaling pathway was fully upregulated in the wild-type ‘Sweet Charlie’, and the expression of the core transcription factor MYC2 of the jasmonic acid (JA) pathway was significantly down-regulated. The expression of the proteins encoded by these genes did not change significantly in the HSP17.4-silenced ‘Sweet Charlie’, indicating that the expression of HSP17.4 activated the up-regulation of downstream signals of SA and inhibited the JA signal pathway. The experiments that used SA, methyl jasmonate and their inhibitors to treat plants provide additional evidence that the antagonism between SA and JA regulates the resistance of strawberry plants to C. gloeosporioides.

ORGANISM(S): Fragaria Vesca Subsp. Vesca

SUBMITTER: Xueying Zhang

PROVIDER: PXD023494 | iProX | Sat Jan 09 00:00:00 GMT 2021

REPOSITORIES: iProX

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Publications

HSP17.4 mediates salicylic acid and jasmonic acid pathways in the regulation of resistance to Colletotrichum gloeosporioides in strawberry.

Fang Xianping X Chai Weiguo W Li Shuigen S Zhang Liqing L Yu Hong H Shen Jiansheng J Xiao Wenfei W Liu Aichun A Zhou Boqiang B Zhang Xueying X

Molecular plant pathology 20210505 7

In this study, we used virus-mediated gene silencing technology and found that the HSP17.4 gene-silenced cultivar Sweet Charlie plants were more susceptible to Colletotrichum gloeosporioides than the wild-type Sweet Charlie, and the level of infection was even higher than that of the susceptible cultivar Benihopp. The results of differential quantitative proteomics showed that after infection with the pathogen, the expression of the downstream response genes NPR1, TGA, and PR-1 of the salicylic ...[more]

PMID: 33951267

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Project description:Infection by the pathogen grape powdery mildew (Erysiphe necator) causes changes in the transcriptome of its susceptible host Vitis vinifera. Infection triggers the host to synthesize the signaling molecule salicylic acid (SA) which regulates the expression of a broad range of defense-related plant genes. In addition, it is hypothesized that E. necator directly modulates gene expression in V. vinifera via the haustorial complex. This microarray experiment was designed to dissect host transcriptome changes triggered directly by E. necator infection and indirectly through the SA response. We accomplished this by conducting two separate global leaf transcriptome analyses using the Vitis Affymetrix GeneChip platform: in one, we compared the leaves with fully established PM colonies to healthy reference leaves, in another, we compared healthy leaves with artificially elevated SA levels to healthy reference leaves. Overlaying host transcriptome changes from these two experiments enabled us to glean out V. vinifera genes that modulate their expression in response E. necator in an SA-independent manner. We characterized gene expression profiles in (1) healthy reference leaves, (2) leaves with well-established by E. necator colonies, and (3) healthy leaves in which SA levels were artificially elevated by the presence of methyl salicylate (15 µM) in the atmosphere. Treatments (1) and (2) differed only in the presence E. necator infection, whereas treatments (1) and (3) differed only in SA levels. Consequently, statistical comparisons were made only between signal intensities from treatments (1) and (2) and from treatments (1) and (3). Each treatment was done in three biological repeats, that is, each experiment was repeated three times in 14-day intervals with dedicated biological material (plants were used in a single replicate and not reused in another repeat or treatment). Each biological replicate consisted of 10 potted vines. For RNA extraction, two young leaves were harvested from each of the 10 vines and pooled into a single sample.

Project description:Background: Cylindrocladium parasiticum Crous, Wingfield & Alfenas, the causal agent of Cylindrocladium black rot (CBR) of peanut (Arachis hypogaea L.), has leaded to economic losses in China. Learning about how peanut responds to C. parasiticum infection will be conducive to designing strategies for CBR control. However, the response of peanut plant to C. parasiticum is poorly understood. Results: In this study, two contrasting peanut cultivars, T09 (C. parasiticum-resistant) and P562 (C. parasiticum-susceptible) were used for comparative analysis of protein profiles in the root segment of peanut plants in responses to C. parasiticum infection. Proteomic profiling identified 1647 and 391 differentially expressed proteins (DEPs) in A. hypogaea L. P562 and A. hypogaea L. T09, respectively, compared to controls. A total of 350 and 1095 DEPs were identified between A. hypogaea L. P562 and A. hypogaea L. T09 before and after 9 dpi, respectively. Functional categorization by GO annotation showed that C. parasiticum-responsive proteins were mainly involved in catalytic activity and binding. The results of KEGG pathway analysis indicated both resistant and susceptible peanut cultivars can regulate gene expression in the phenylpropanoid pathway, terpenoid backbone biosynthesis, SA, and JA pathways to induce defensive genes and protein expression which enhances plant defence capacity. However, the MAPK signal pathway was more pronounced in resistant peanut cultivar T09. We also observed an increase of CYP73A100 involved in phenylpropanoid biosynthesis and flavonoid biosynthesis pathways in the susceptible peanut ecotype P562, while decrease in the resistant peanut ecotype T09, after 9 dpi. Additionally, there was a marked activation of brassinosteroid biosynthesis in the resistant T09, which indicated a possible involvement of activation of plant immune response in the resistant responses of peanut to C. parasiticum. Conclusions: This study provides some insights into the molecular networks involved on cellular and physiological responses to C. parasiticum infestation.

Dataset Information

Hsp17.4 mediates salicylic acid and jasmonic acid pathways in the regulation of resistance to strawberry anthracnose

Publications

HSP17.4 mediates salicylic acid and jasmonic acid pathways in the regulation of resistance to Colletotrichum gloeosporioides in strawberry.

Similar Datasets

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