Document Detail

The phytoplasmal virulence factor TENGU causes plant sterility by downregulating of the jasmonic acid and auxin pathways.
MedLine Citation:
PMID:  25492247     Owner:  NLM     Status:  In-Data-Review    
Despite plants infected by pathogens are often unable to produce offspring, it remains unclear how sterility is induced in host plants. In this study, we demonstrate that TENGU, a phytoplasmal virulence peptide known as a dwarfism inducer, acts as an inducer of sterility. Transgenic expression of TENGU induced both male and female sterility in Arabidopsis thaliana flowers similar to those observed in double knockout mutants of auxin response factor 6 (ARF6) and ARF8, which are known to regulate floral development in a jasmonic acid (JA)-dependent manner. Transcripts of ARF6 and ARF8 were significantly decreased in both tengu-transgenic and phytoplasma-infected plants. Furthermore, JA and auxin levels were actually decreased in tengu-transgenic buds, suggesting that TENGU reduces the endogenous levels of phytohormones by repressing ARF6 and ARF8, resulting in impaired flower maturation. TENGU is the first virulence factor with the effects on plant reproduction by perturbation of phytohormone signaling.
Nami Minato; Misako Himeno; Ayaka Hoshi; Kensaku Maejima; Ken Komatsu; Yumiko Takebayashi; Hiroyuki Kasahara; Akira Yusa; Yasuyuki Yamaji; Kenro Oshima; Yuji Kamiya; Shigetou Namba
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Publication Detail:
Type:  Journal Article     Date:  2014-12-10
Journal Detail:
Title:  Scientific reports     Volume:  4     ISSN:  2045-2322     ISO Abbreviation:  Sci Rep     Publication Date:  2014  
Date Detail:
Created Date:  2014-12-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101563288     Medline TA:  Sci Rep     Country:  England    
Other Details:
Languages:  eng     Pagination:  7399     Citation Subset:  IM    
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