Seed Priming Approaches That Achieve Environmental Stress Tolerance
A special issue of Seeds (ISSN 2674-1024).
Deadline for manuscript submissions: closed (31 March 2024) | Viewed by 49734
Special Issue Editors
Interests: antioxidant systems; ASC-GSH cycle; halophyte plants; hormone profile; hydrogen peroxide; reactive oxygen species; redox signaling; proteomic; saline agriculture; salinity; seed biology; seed dormancy
Special Issues, Collections and Topics in MDPI journals
Interests: Antioxidant metabolism; biosaline agriculture; crop management; Plant biotechnology and breeding; plant stress physiology; proteomics, molecular biology; redox biology; seed germination
Special Issues, Collections and Topics in MDPI journals
Interests: salt-stress response; abiotic and biotic stresses; growth regulator; antioxidant; antioxidative metabolism; Environmental Stresses; oxidative stress; cell proliferation; metabolomics; plant tissue culture; plant physiology and biochemistry; reactive oxygen species
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
Seed dormancy has been defined as the inability of a viable seed to germinate under favorable conditions. In contrast, a non-dormant seed is a seed able to germinate under all the environmental conditions that are normally compatible with the germination process. Dormancy release is a term used to describe the process by which a dormant seed lost its dormancy.
Seed germination and seed vigor can be enhanced by different chemical or physical treatments and this process is called “seed priming”. Thus, seed priming can be defined as treatments for enhancing seed germination and vigor. Seed priming can be a costless, practical, and effective approach, leading to fast and uniform germination, and increasing seedling vigor and crop yield in numerous crops, especially under unfavorable environmental conditions, in both dormant and non-dormant seeds. Similarly, seed priming can lead to higher resistance to environmental stress conditions, including biotic and abiotic stressors.
Different seed priming aprroaches, including osmopriming, hydropriming, phytohormone-priming, chemical priming, nutrient priming, and redox priming, have been described. In the latter group, hydrogen peroxide (H2O2) should also be included, as it is well known that, at low concentrations, H2O2 stimulates seed germination as well as the early seedling growth of plants. In addition, physical treatments can also stimulate seed germination and vigor. In this regard, specifically, the short treatments of seeds with red light also stimulates seed germination and vigor.
Seed priming induces a series of changes that improve the posterior performance of the seedlings and such improvements may include the increase in K+ content; prevention of chlorophyll degradation; increase of chlorophyll content; activation of antioxidant defenses; hormone metabolism modulation; proteome changes; and increases in yield and harvest quality. Moreover, different priming techniques have proved to be effective in improving the nutritional value of edible sprouts, resulting in greater health benefits.
The molecular mechanisms involved in seed germination stimulation as well as in seed dormancy breakdown are not known in depth. In this sense, the widespread application of the omics techniques shall help to shed light on these intrincate processes.
The aim and scope of this Special Issue is to encourage the publication of review and/or experimental research regarding physiological, biochemical, and molecular aspects related to the effect of seed priming on germination and seedling establishment in dormant and non-dormant seeds, and regarding their interaction with environmental stresses.
Dr. José Antonio Hernández Cortés
Dr. Gregorio Barba-Espín
Dr. Pedro Diaz-Vivancos
Guest Editors
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Keywords
- antioxidants
- environmental stress
- carbohydrate metabolism
- hormone profile
- seed germination
- seed priming
- seed dormancy
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