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    Colonization by the endophyte Piriformospora indica leads to early flowering in Arabidopsis thaliana likely by triggering gibberellin biosynthesis

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    Type
    Article
    Authors
    Kim, Dongjin cc
    Abdelaziz, Mohamed Ewis
    Ntui, Valentine Otang
    Guo, Xiujie
    Al-Babili, Salim cc
    KAUST Department
    Biological and Environmental Science and Engineering (BESE) Division
    Center for Desert Agriculture
    Plant Science
    Date
    2017-06-28
    Online Publication Date
    2017-06-28
    Print Publication Date
    2017-09
    Permanent link to this record
    http://hdl.handle.net/10754/625159
    
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    Abstract
    Piriformospora indica is an endophytic fungus colonizing roots of a wide variety of plants. Previous studies showed that P. indica promotes early flowering and plant growth in the medicinal plant Coleus forskohlii. To determine the impact of P. indica on flowering time in Arabidopsis, we co-cultivated the plants with P. indica under long day condition. P. indica inoculated Arabidopsis plants displayed significant early flowering phenotype. qRT-PCR analysis of colonized plants revealed an up-regulation of flowering regulatory (FLOWERING LOCUS T, LEAFY, and APETALA1) and gibberellin biosynthetic (Gibberellin 20-Oxidase2, Gibberellin 3-Oxidase1 and Gibberellin requiring1) genes, while the flowering-repressing gene FLOWERING LOCUS C was down regulated. Quantification of gibberellins content showed that the colonization with P. indica caused an increase in GA4 content. Compared to wild-type plants, inoculation of the Arabidopsis ga5 mutant affected in gibberellin biosynthetic gene led to less pronounced changes in the expression of genes regulating flowering and to a lower increase in GA4 content. Taken together, our data indicate that P. indica promotes early flowering in Arabidopsis likely by increasing gibberellin content.
    Citation
    Kim D, Abdelaziz ME, Ntui VO, Guo X, Al-Babili S (2017) Colonization by the endophyte Piriformospora indica leads to early flowering in Arabidopsis thaliana likely by triggering gibberellin biosynthesis. Biochemical and Biophysical Research Communications. Available: http://dx.doi.org/10.1016/j.bbrc.2017.06.169.
    Sponsors
    This work was funded by King Abdullah University of Science and Technology (KAUST).
    Publisher
    Elsevier BV
    Journal
    Biochemical and Biophysical Research Communications
    DOI
    10.1016/j.bbrc.2017.06.169
    PubMed ID
    28668394
    Additional Links
    http://www.sciencedirect.com/science/article/pii/S0006291X17313013
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.bbrc.2017.06.169
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Center for Desert Agriculture

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