期刊
FRONTIERS IN PLANT SCIENCE
卷 12, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2021.661789
关键词
abscisic acid; anoxia; ethylene; gibberellins; hypoxia; nitric oxide; soil flooding
资金
- Spanish Ministerio de Economia y Competitividad
- Universitat Jaume I
- Generalitat Valenciana/Fondo Europeo de Desarrollo Regional (FEDER) [AGL2016-76574-R, UJI-B2016-23, UJI-B2016-24, IDIFEDER/2018/010, UJI-B2019-24]
- Ramon y Cajal contract from Spanish Ministerio de Economia y Competitividad [RYC-2016-19325]
Plant responses to low oxygen conditions are mainly regulated by ethylene, but other hormonal pathways such as gibberellins, auxin, and nitric oxide are also involved. Abscisic acid is traditionally considered a negative regulator of morphological adaptations to waterlogging, but recent evidence suggests a positive role in plant responses to hypoxia and recovery.
Different environmental and developmental cues involve low oxygen conditions, particularly those associated to abiotic stress conditions. It is widely accepted that plant responses to low oxygen conditions are mainly regulated by ethylene (ET). However, interaction with other hormonal signaling pathways as gibberellins (GAs), auxin (IAA), or nitric oxide (NO) has been well-documented. In this network of interactions, abscisic acid (ABA) has always been present and regarded to as a negative regulator of the development of morphological adaptations to soil flooding: hyponastic growth, adventitious root emergence, or formation of secondary aerenchyma in different plant species. However, recent evidence points toward a positive role of this plant hormone on the modulation of plant responses to hypoxia and, more importantly, on the ability to recover during the post-hypoxic period. In this work, the involvement of ABA as an emerging regulator of plant responses to low oxygen conditions alone or in interaction with other hormones is reviewed and discussed.
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