Abstract:
One of the most promising treatments carried out with the intent of reducing the time needed
between sowing and the seedling emergence, and to increase seed tolerance to adverse conditions
during seed germination and seedling establishment is the osmoconditioning, also called
priming. This review reveals major changes showed in abiotic-stressed plants as function of seed
priming treatments, with a must approach about physiological and biochemical changes
promoted by seeds priming. Many studies cited in this review have reported improvements in
seed physiological quality and seedling vigor by seed priming under abiotic stresses conditions
and its has been related with repair and build-up of nucleic acids, increased synthesis of proteins,
osmotic adjustment mechanisms, repair of membranes and reduced lipid peroxidation, resulting
from enhanced antioxidative activities. However, further studies are necessary to explain how the
physiological and biochemical changes caused by seed priming improve the plant adaptations to
environmental stressful conditions. |
