Exogenous Abscisic Acid Confers Salinity Tolerance in Chlamydomonas reinhardtii During Its Life Cycle

Said Abu-Ghosh, David Iluz, Zvy Dubinsky, Gad Miller

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The plant hormone abscisic acid (ABA) coordinates responses to environmental signals with developmental changes and is important for stress resilience and crop yield. However, fundamental questions remain about how this phytohormone affects microalgal growth and stress regulation throughout the different stages of their life cycle. In this study, the effects of ABA on the physiology of the freshwater microalga Chlamydomonas reinhardtii at its different life cycle stages were investigated. Exogenously added ABA enhanced the growth and photosynthesis of C. reinhardtii during the vegetative stage. The hormone also increased the tolerance of this alga to high-salinity stress during gamete formation under nutrient depletion, as well as it extended their survival. We show that the level of reactive oxygen species (ROS) generated in the ABA-treated cells was significantly less than that in the untreated cells under inhibiting NaCl concentrations. Cell size examination showed that ABA prevents cells from forming palmella when exposed to high salinity. All together, these results suggest that ABA can support the vitality and survival of C. reinhardtii under high salt conditions.

Original languageEnglish
Pages (from-to)1323-1334
Number of pages12
JournalJournal of Phycology
Volume57
Issue number4
Early online date7 May 2021
DOIs
StatePublished - Aug 2021

Bibliographical note

Publisher Copyright:
© 2021 Phycological Society of America

Funding

We thank Dr. Iftach Yacoby from Tel Aviv University for providing us with the C. reinhardtii culture and Prof. Assaf Vardi from Weizmann Institute of Science for the scientific discussion. This work was financially supported by Israel Science Foundation (ISF) # 1681/19. The author Said Abu-Ghosh dedicates this work to his parents. We thank Dr. Iftach Yacoby from Tel Aviv University for providing us with the culture and Prof. Assaf Vardi from Weizmann Institute of Science for the scientific discussion. This work was financially supported by Israel Science Foundation (ISF) # 1681/19. The author Said Abu‐Ghosh dedicates this work to his parents. C. reinhardtii

FundersFunder number
Weizmann Institute of Science
Israel Science Foundation1681/19
Tel Aviv University

    Keywords

    • Chlamydomonas
    • ROS
    • abscisic acid
    • gametes
    • growth
    • photosynthesis
    • salt stress

    Fingerprint

    Dive into the research topics of 'Exogenous Abscisic Acid Confers Salinity Tolerance in Chlamydomonas reinhardtii During Its Life Cycle'. Together they form a unique fingerprint.

    Cite this