Review Physiological, biochemistry and gene expression aspects in water stress. Influence in the germination process

Abstract

The water limit condition induced in plants responses that affect their morphology, physiology and metabolism. Once this kind of stress is persuaded, it began transduction signs ways and genes expression associated that influence in cellular, tissue and organ changes. The ambient conditions that limit water availability for plants include three principal factors: the moment of the year when occur (summer or winter), the intensity (light or severe) and duration (days, weeks, months); but also depends of intrinsic factors, like the stage of development of the plant in the moment that water stress occur, the vegetal species and the variety in one specie. All that aspects participated in the cultivar productivity impact. The water is one important and basic resource for the germination process, and it is essential for the enzyme activation, translocation and used of the reserve material in the seeds. With this work existed some effects that can be the result of water deficit in the soil for the development of the plants, principally in the germination process. Besides it is analyzed the implication of this condition to make the stablemen of cultivars in yield.