Molecular and Genetic Control of Orthodox Seed Dormancy
A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Physiology and Metabolism".
Deadline for manuscript submissions: closed (31 January 2022) | Viewed by 459
Special Issue Editor
Interests: molecular and physiological aspects of seeds development
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
The seed, a key entity in the life cycle of higher plants, allows and ensures its survival by acquiring primary dormancy, which is hormonally induced and then maintained and strictly regulated by the modulation of a suitable hormonal signaling network. The dormancy of some seeds can be relieved through a tightly regulated process called after-ripening (AR) that occurs in dry, mature, and viable seeds stored in dry conditions. As a result of AR, abundant changes of transcripts take place and the window of environmental conditions that allow seed germination widens. The events occurring during this loss of dormancy are of significant functional, ecological, and agricultural interest. Genetic, –omics, and physiological studies about AR have shown the key role of the balance between gibberellins (GAs) and abscisic acid (ABA) metabolism and sensitivity. Recent evidence also supports a possible role of ethylene in AR execution and modulation. However, hormone-independent signals (e.g., reactive oxygen species (ROS) and nitrate) also appear to be involved in the triggering and maintenance of AR. The way in which hormone- and non-hormone-signaling pathways affect each other is still scarcely known. With all these aforementioned factors put together, the implementation of AR involves genes associated with the completion of germination. However, the complexity and diversity of mechanisms that trigger and control AR is a great puzzle, with the majority of its pieces still missing.
Prof. Dr. Angel J. Matilla
Guest Editor
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Keywords
- AR mutants
- cell wall degradation
- monocot- and dicot-seeds
- phytohormones
- RBOHD genes
- ROS homeostasis mutants
- seed pathogenesis
- specific regulators of AR
- tissue specificity of gene expression
