Overexpression of Hevea brasiliensis ethylene response factor HbERF-IXc5 enhances growth and tolerance to abiotic stress and affects laticifer differentiation

Retno Lestari, Maryannick Rio, Florence Martin, Julie Leclercq, Natthakorn Woraathasin, Sandrine Roques, Florence Dessailly, Anne Clément-Vidal, Christine Sanier, Denis Fabre, Sémi Melliti, Sony Suharsono, Pascal Montoro

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Ethylene response factor 1 (ERF1) is an essential integrator of the jasmonate and ethylene signalling pathways coordinating a large number of genes involved in plant defences. Its orthologue in Hevea brasiliensis, HbERF-IXc5, has been assumed to play a major role in laticifer metabolism and tolerance to harvesting stress for better latex production. This study sets out to establish and characterize rubber transgenic lines overexpressing HbERF-IXc5. Overexpression of HbERF-IXc5 dramatically enhanced plant growth and enabled plants to maintain some ecophysiological parameters in response to abiotic stress such as water deficit, cold and salt treatments. This study revealed that HbERF-IXc5 has rubber-specific functions compared to Arabidopsis ERF1 as transgenic plants overexpressing HbERF-IXc5 accumulated more starch and differentiated more latex cells at the histological level. The role of HbERF-IXc5 in driving the expression of some target genes involved in laticifer differentiation is discussed.

Original languageEnglish
Pages (from-to)322-336
Number of pages15
JournalPlant Biotechnology Journal
Volume16
Issue number1
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • genetic modification
  • latex
  • plant hormone
  • rubber
  • transcription factor

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