Project description:Background: Witches’ broom disease of Mexican lime (Citrus aurantifolia L.), which is caused by the phytoplasma “Candidatus Phytoplasma aurantifolia”, is a devastating disease that results in significant economic losses. Plants adapt to abiotic stresses by regulating gene expression at the transcriptional and post-transcriptional levels. MicroRNAs (miRNAs) are a recently identified family of molecules that regulate plant responses to environmental stresses through post-transcriptional gene silencing. Methods: Using a high-throughput approach to sequence small RNAs, we compared the expression profiles of miRNAs in healthy Mexican lime trees and in plants infected with “Ca. Phytoplasma aurantifolia”. Results: Our results demonstrated the involvement of different miRNAs in the response of Mexican lime trees to infection by “Ca. Phytoplasma aurantifolia”. We identified miRNA families that are expressed differentially upon infection with phytoplasmas. Most of the miRNAs had variants with small sequence variations (isomiRs), which are expressed differentially in response to pathogen infection. Conclusions: It is likely that the miRNAs that are expressed differentially in healthy and phytoplasma-infected Mexican lime trees are involved in coordinating the regulation of hormonal, nutritional, and stress signalling pathways, and the complex interactions between them. Future research to elucidate the roles of these miRNAs should improve our understanding of the level of diversity of specific plant responses to phytoplasmas.

2013-03-09 | GSE44279 | GEO

Candidatus Phytoplasma australasiaticum

Project description:Candidatus Phytoplasma australasiaticum overview

| PRJNA1009196 | ENA

Candidatus Phytoplasma australasiaticum subsp. australasiaticum strain:PR08

Project description:Parthenium phyllody phytoplasma strain PR08

| PRJNA657415 | ENA

Phytoplasma induced changes in acetylatome and succinylatome provide evidence for involvement of acetylated proteins in Paulownia witches’ broom

Project description:Lysine acetylation and succinylation are post-translational modifications of proteins, and have been shown to play roles in plant response to pathogen infection. Phytoplasma infection can directly alter multiple metabolic processes in Paulownia and lead to Paulownia witches’ broom (PaWB), the major cause of Paulownia mortality worldwide. To explore the extent and function of lysine acylations during phytoplasma infection, we investigated global proteome, acetylome, and succinylome of phytoplasma-infected Paulownia tomentosa seedlings. In total, we globally yield 8963 proteins, 2893 acetylated, and 1271 succinylated proteins. Among them, 425 substrates were simultaneously acetylated and succinylated. Comparative analysis revealed that 276 proteins, 546 acetylated proteins and 5 succinylated proteins were associated with PaWB. Our results suggested that acetylation may be more important than succinylation in response to phytoplasma infection. Enzymatic assays showed that acetylation modified the activities of protochlorophyllide reductase and RuBisCO in phytoplasma-infected seedlings. On the basis of these results, a model to elucidate the molecular mechanism responses to PaWB was proposed and this research offer a resource for functional studies on the effects of acetylation on protein function.

2019-04-04 | PXD012701 | Pride

Candidatus Phytoplasma ziziphi isolate:Jujube witches-broom disease

Project description:Candidatus Phytoplasma ziziphi isolate:Jujube witches-broom disease Genome sequencing

| PRJNA788335 | ENA