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Analysis of Transcriptional Responses of the Inflorescence Meristems in Jatropha curcas Following Gibberellin Treatment. | LitMetric

Analysis of Transcriptional Responses of the Inflorescence Meristems in Jatropha curcas Following Gibberellin Treatment.

Int J Mol Sci

Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China.

Published: February 2018

AI Article Synopsis

  • L. is an oilseed plant with potential for biodiesel, but its low seed yield due to fewer female flowers has limited its use.
  • A study showed that treating the plants with gibberellin (GA₃) increased the number of flowers and improved the female-to-male flower ratio.
  • Transcriptomic analysis revealed 951 differentially expressed genes after GA₃ treatment, with key pathways influencing flower differentiation, suggesting this research could help develop higher-yield varieties.

Article Abstract

L. seeds an oilseed plant with great potential for biodiesel production. However, low seed yield, which was limited by its lower female flowers, was a major drawback for its utilization. Our previous study found that the flower number and female-to-male ratio were increased by gibberellin treatment. Here, we compared the transcriptomic profiles of inflorescence meristem at different time points after gibberellic acid A3 (GA₃) treatment. The present study showed that 951 differentially expressed genes were obtained in response to gibberellin treatment, compared with control samples. The 6-h time point was an important phase in the response to exogenous gibberellin. Furthermore, the plant endogenous gibberellin, auxin, ethylene, abscisic acid, and brassinolide-signaling transduction pathways were repressed, whereas the genes associated with cytokinin and jasmonic acid signaling were upregulated for 24-h time point following GA₃ treatment. In addition, the floral meristem determinacy genes (, ) and floral organ identity genes (, , ) were significantly upregulated, but their negative regulator () was downregulated after GA₃ treatment. Moreover, the effects of phytohormone, which was induced by exogenous plant growth regulator, mainly acted on the female floral differentiation process. To the best of our knowledge, this data is the first comprehensive analysis of the underlying transcriptional response mechanism of floral differentiation following GA₃ treatment in , which helps in engineering high-yielding varieties of .

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5855654PMC
http://dx.doi.org/10.3390/ijms19020432DOI Listing

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