Abscisic acid is involved in phenolic compounds biosynthesis, mainly anthocyanins, in leaves of Aristotelia chilensis plants (Mol.) subjected to drought stress

Jorge González-Villagra, Jerry D. Cohen, Marjorie M. Reyes-Díaz

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Abscisic acid (ABA) regulates the physiological and biochemical mechanisms required to tolerate drought stress, which is considered as an important abiotic stress. It has been postulated that ABA might be involved in regulation of plant phenolic compounds biosynthesis, especially anthocyanins that accumulate in plants subjected to drought stress; however, the evidence for this postulate remains elusive. Therefore, we studied whether ABA is involved in phenolic compounds accumulation, especially anthocyanin biosynthesis, using drought stressed Aristotelia chilensis plants, an endemic berry in Chile. Our approach was to use fluridone, an ABA biosynthesis inhibitor, and then subsequent ABA applications to young and fully-expanded leaves of drought stressed A. chilensis plants during 24, 48 and 72 h of the experiment. Plants were harvested and leaves were collected separately to determine the biochemical status. We observed that fluridone treatments significantly decreased ABA concentrations and total anthocyanin (TA) concentrations in stressed plants, including both young and fully-expanded leaves. TA concentrations following fluridone treatment were reduced around fivefold, reaching control plant levels. ABA application restored ABA levels as well as TA concentrations in stressed plant at 48 h of the experiment. We also observed that TA concentrations followed the same pattern as ABA concentrations in the ABA treated plants. Quantitative real-time PCR revealed that AcUFGT gene expression decreased in fully-expanded leaves of stressed plants treated with fluridone, while a subsequent ABA application increased AcUFGT expression. Taken together, our results suggest that ABA is involved in the regulation of anthocyanin biosynthesis under drought stress.

Original languageEnglish (US)
Pages (from-to)855-866
Number of pages12
JournalPhysiologia Plantarum
Volume165
Issue number4
DOIs
StatePublished - Apr 2019

Bibliographical note

Funding Information:
Acknowledgements – We thank the Comisión Nacional de Investigación Científica y Tecnológica for the PhD grant to JG-V (CONICYT at N∘ 21130602) and FONDECYT 1171286 project. We also thank BestPlant Co., Chile, for providing the maqui plants. The authors also thank Dr. Victor Polanco from Universidad Mayor for kindly providing AcUFGT primer sequences and Mariela Mora Garrido, biologist, and Mario Díaz Matus, biotechnologist, for their collaboration in HPLC-DAD and qRT-PCR analyses, respectively. Research at the University of Minnesota was supported by U.S. National Science Foundation grant IOS1238812 and by funds from the Gordon and Margaret Bailey Endowment for Environmental Horticulture.

Funding Information:
We thank the Comisi?n Nacional de Investigaci?n Cient?fica y Tecnol?gica for the PhD grant to JG-V (CONICYT at N? 21130602) and FONDECYT 1171286 project. We also thank BestPlant Co., Chile, for providing the maqui plants. The authors also thank Dr. Victor Polanco from Universidad Mayor for kindly providing AcUFGT primer sequences and Mariela Mora Garrido, biologist, and Mario D?az Matus, biotechnologist, for their collaboration in HPLC-DAD and qRT-PCR analyses, respectively. Research at the University of Minnesota was supported by U.S. National Science Foundation grant IOS1238812 and by funds from the Gordon and Margaret Bailey Endowment for Environmental Horticulture.

Fingerprint Dive into the research topics of 'Abscisic acid is involved in phenolic compounds biosynthesis, mainly anthocyanins, in leaves of Aristotelia chilensis plants (Mol.) subjected to drought stress'. Together they form a unique fingerprint.

Cite this