How amino acids help plants manage stress
Author Information
Author(s): Jitka Široká, Anita Ament, Václav Mik, Tomáš Pospíšil, Michaela Kralová, Chao Zhang, Markéta Pernisová, Michal Karady, Vladimira Nožková, Yuho Nishizato, Takuya Kaji, Rina Saito, Mohamed Htitich, Kristýna Floková, Claus Wasternack, Miroslav Strnad, Minoru Ueda, Ondřej Novák, Federica Brunoni
Primary Institution: Palacký University, Czech Academy of Sciences, Tohoku University
Hypothesis
The study investigates how amide conjugates of the jasmonate precursor cis-(+)-12-oxo-phytodienoic acid regulate its homeostasis during plant stress responses.
Conclusion
The study found that OPDA amino acid conjugates play a role in the catabolism or temporary storage of cis-OPDA during stress responses in plants.
Supporting Evidence
- OPDA amino acid conjugates were identified in response to biotic and abiotic stress in Arabidopsis.
- The synthesis and hydrolysis of these conjugates are mediated by specific enzyme families.
- Conjugation of cis-OPDA to amino acids is a metabolic mechanism for stress response.
- OPDA-aa exhibit a growth-inhibitory effect in a JA-Ile-dependent manner.
- Hydrolysis of OPDA-aa leads to the release of cis-OPDA, which can then be converted to active jasmonates.
Takeaway
Plants can attach special molecules called amino acids to a stress signal to help manage their response to tough situations, like being hurt or attacked by pests.
Methodology
The study involved analyzing the accumulation of OPDA amino acid conjugates in Arabidopsis under various stress conditions and assessing their effects on plant responses.
Limitations
The study faced challenges in detecting low-abundance OPDA-aa under steady-state growth conditions, which may affect the results.
Digital Object Identifier (DOI)
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