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Forests 2018, 9(6), 318;

Comparative Transcriptomics Analysis of Phytohormone-Related Genes and Alternative Splicing Events Related to Witches’ Broom in Paulownia

Institute of Paulownia, Henan Agricultural University, Zhengzhou 450002, China
Forestry Academy of Henan, Zhengzhou 450008, China
Author to whom correspondence should be addressed.
Received: 25 April 2018 / Revised: 19 May 2018 / Accepted: 31 May 2018 / Published: 2 June 2018
(This article belongs to the Section Forest Ecophysiology and Biology)
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Paulownia is a native fast-growing tree in China that has been introduced into many countries. However, it is often infected by Paulownia witches’ broom (PaWB) disease, which can lead to large declines in yield. PaWB is caused by a phytoplasma that is an obligate biotrophic plant pathogen. Until now, the molecular mechanisms of interactions between the host plants and the phytoplasma have not been clear. In previous studies, it was reported that PaWB-infected Paulownia exhibited healthy morphology after being treated with methyl methane sulfonate (MMS) at the concentration of 20 mg·L−1 (for Paulownia tomentosa (PT) and Paulownia fortunei (PF) or 15 mg·L−1 (for P. tomentosa × P. fortunei) MMS. In this study, the whole transcriptome expression profile of PaWB-infected Paulownia was studied using high-throughput sequencing technology. In total, 74 significantly differentially expressed genes were detected among three species of healthy, PaWB-infected Paulownia, and the Paulownia treated with MMS. We identified and analyzed genes related to the roles of phytohormones and alternative splicing events involved in regulating plant growth. In response to phytoplasma infection, the concentrations of the plants’ phytohormones were altered, leading to morphology transformation. This research will provide valuable information to detect the molecular mechanisms involved in the Paulownia response to phytoplasma infection. View Full-Text
Keywords: Paulownia; phytoplasma; MMS; phytohormone; alternative splicing Paulownia; phytoplasma; MMS; phytohormone; alternative splicing

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Dong, Y.; Zhang, H.; Fan, G.; Zhai, X.; Wang, Z.; Cao, Y. Comparative Transcriptomics Analysis of Phytohormone-Related Genes and Alternative Splicing Events Related to Witches’ Broom in Paulownia. Forests 2018, 9, 318.

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