The result is related to the study of affectations provoking different types of abiotic stress, on aspects of rice and tomato plants biology. It allows to support, trhough a close up to tolerance mecanisms , the behavior of different cultivars selected due to their good development under environmental stressing field conditions.

It is a result of interest for Plant Genetic Improvement and to the knowledge on these new cultivars allowing the development cultural practices as a way to minimize stress effects , through agronomic studies. There is already a first version of a book gathering the work result, which contributes to a greater generalization of results.

Results have scientific novelty since they describe, for the first time, Cuban cultivars behavior under normal conditions and its tolerance mecanisms, and it also addresses aspects related to Global Changes, potentially generalizazed to other regions. The knowledge contributions cover different science branches both from a basic and an applied approach. It obtains evident scientific results.

A methodology to determine photosyntesis was defined through an oxigen selective electrode . The critical role of tilacoidal membrane disorganization in photosyntesis reduction, on the effect of chlroloplastic membrane and the enzymes soluble in stroma, the relation between photochemical activity and dark reactions, the role of proxidase enzymes and mutase superoxide in cell deffense against oxidative stress.

Likewise, the relation to salt tolerance in tomato plants, with the capability to absorbing and transporting Ca cation to higher metabolic activity zones, as well as Mg cation in the osmotic adjustment under saline conditions. It contributes also with interesting results regarding plant ultrastructure affectations due to salinity. It has 20 publications in national and international journals in the last 6 years: 12 articles in Tropical Crops Journal, Physiología Plantarum (1), Horticlulture Agreement (1), International Congress Proceeding (3), Plant Science (1), Biología Plantarum (1), Agriculture Journal of Sao Paulo, Brazil (1).

The obtained experimental results have been validated in 33 national and international; they have allowed the development of a Doctorate and another one of Master´s. Likewise, the results are gathered in a book in edition: Abiotic Stress and its Impact on Plants Biology.