Based upon the brief description of the germination and dessicationtolerance ability, shallow dormancy and viviparous germination during tomato (Lycopersicum esculentum Mill.) seeds, the physiological mechanism of GA and ABA on the regulation of water relations, embyo growth, DNA replication and endosperm weakening was emphatically discussed. The dormancy that was induced by ABA during development, remained in mature seeds and relieved by using promotors like GA4+7 or prolonged dry storage. Seed precocious and viviparous germination within tomato fruit could be prevented by osmotic environment...
