Hormonal Regulation of Plants in Response to Combined Environmental Stresses

Dear Colleagues,

Plant growth and development are shaped by environmental conditions, which are becoming more extreme due to the effects of climate change and global warming, and they have become a key factor collectively limiting agricultural yield and productivity worldwide. Hence, during their life cycle, plants have to face different environmental stresses, which could take place at the same time or in a consecutive manner. To hamper environmental stress consequences, plants have designed resilience molecular mechanisms to produce a large number of stress responsive gene products, leading to plant stress tolerance and survival. These stress-responsive gene products include tolerance proteins, enzymes involved in phytohormones biosynthesis and metabolism, transport proteins, detoxification enzymes, and a variety of signal transduction proteins including kinases, phosphatases and transcription factors. Several plant hormones are involved in controlling resilience molecular mechanisms. Among them, abscisic acid (ABA) has been regarded as the universal abiotic stress hormone and jasmonic acid and its derivates (jasmonates, JAs) together with salicilyc acid (SA) are the main phytohormones steering plant responses to biotic stresses. However, the hormonal crosstalk between them and with other hormones such as ethylene, cytokinins or gibberellins is crucial to fine-tune plant stress responses, especially when a combination of environmental stresses occurs on crop fields. Molecular mechanisms that control hormonal crosstalk are very complex and include phosphorylation/dephosphorylation events and protein modifications such as nitration, ubiquitylation or sumolization, among others.

Therefore, this Special Issue will focus on the latest findings in all of these aspects of the hormonal control of molecular mechanisms steering plant responses to environmental stress combinations.

Dr. Miguel González-Guzmán
Guest Editor

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• phytohormones
• hormonal crosstalk
• plant tolerance
• model and non-model plants
• stress combination
• omics technology