Effects of sublethal single, simultaneous and sequential abiotic stresses on phenotypic traits of Arabidopsis thaliana

Alejandro Morales*, Hugo J. De Boer, Jacob C. Douma, Saskia Elsen, Sophie Engels, Tobias Glimmerveen, Nikita Sajeev, Martina Huber, Mathijs Luimes, Emma Luitjens, Kevin Raatjes, Chenyun Hsieh, Juliane Teapal, Tessa Wildenbeest, Zhang Jiang, Ashwani Pareek, Sneh Singla-Pareek, Xinyou Yin, Jochem Evers, Niels P.R. AntenMartijn Van Zanten, Rashmi Sasidharan

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)

Abstract

Plant responses to abiotic stresses are complex and dynamic, and involve changes in different traits, either as the direct consequence of the stress, or as an active acclimatory response. Abiotic stresses frequently occur simultaneously or in succession, rather than in isolation. Despite this, most studies have focused on a single stress and single or few plant traits. To address this gap, our study comprehensively and categorically quantified the individual and combined effects of three major abiotic stresses associated with climate change (flooding, progressive drought and high temperature) on 12 phenotypic traits related to morphology, development, growth and fitness, at different developmental stages in four Arabidopsis thaliana accessions. Combined sublethal stresses were applied either simultaneously (high temperature and drought) or sequentially (flooding followed by drought). In total, we analysed the phenotypic responses of 1782 individuals across these stresses and different developmental stages. Overall, abiotic stresses and their combinations resulted in distinct patterns of effects across the traits analysed, with both quantitative and qualitative differences across accessions. Stress combinations had additive effects on some traits, whereas clear positive and negative interactions were observed for other traits: 9 out of 12 traits for high temperature and drought, 6 out of 12 traits for post-submergence and drought showed significant interactions. In many cases where the stresses interacted, the strength of interactions varied across accessions. Hence, our results indicated a general pattern of response in most phenotypic traits to the different stresses and stress combinations, but it also indicated a natural genetic variation in the strength of these responses. This includes novel results regarding the lack of a response to drought after submergence and a decoupling between leaf number and flowering time after submergence. Overall, our study provides a rich characterization of trait responses of Arabidopsis plants to sublethal abiotic stresses at the phenotypic level and can serve as starting point for further in-depth physiological research and plant modelling efforts.

Original languageEnglish
Article numberplac029
JournalAoB Plants
Volume14
Issue number4
DOIs
Publication statusPublished - 1 Aug 2022

Keywords

  • Abiotic stress
  • acclimation
  • Arabidopsis thaliana
  • drought
  • flooding
  • high temperature
  • sequential stresses
  • simultaneous stresses
  • thermomorphogenesis

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