JOURNAL ARTICLE

Osmoregulation is a crucial factor for methyl jasmonate to enhance chilling tolerance of Jatropha curcas L.

  • Published In: Tree Physiology, 2025, v. 45, n. 4. P. 1 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Lan, Shanshan; Gong, Ming; Yang, Shuanglong 3 of 3

Abstract

This article investigates how exogenous methyl jasmonate (MeJA) enhances chilling tolerance in Jatropha curcas L. seedlings under 5 °C stress, focusing on osmoregulation mechanisms. The study found that treatment with 75 μmol L⁻¹ MeJA improved seedling growth, photosynthetic capacity, tissue vitality, and water retention while reducing membrane damage indicators such as malondialdehyde content and electrolyte leakage. MeJA increased the accumulation of osmoprotectants—proline, glycine betaine, and trehalose—by activating their biosynthetic enzymes and genes (P5CS, OAT, BADH, TPS) and inhibiting proline degradation (ProDH), thereby enhancing cellular water balance. Additionally, MeJA elevated endogenous jasmonic acid and ethylene levels and upregulated the transcription factor JcMYC2, suggesting involvement of the JA/MeJA-MYC2 signaling pathway and ethylene in mediating chilling tolerance. Overall, the findings highlight osmoregulation as a key component of MeJA-induced chilling tolerance in J. curcas seedlings.

Additional Information

  • Source:Tree Physiology. 2025/04, Vol. 45, Issue 4, p1
  • Document Type:Article
  • Subject Area:Agriculture and Agribusiness
  • Publication Date:2025
  • ISSN:0829-318X
  • DOI:10.1093/treephys/tpaf037
  • Accession Number:184926043
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