Condicionamento fisiológico de sementes armazenadas de crambe (Crambe abyssinica Hochst)

Abstract

The crambe (Crambe abyssinicaHochst) has been cultivated because of its potential in the production of oil in its seeds, as fodder plant, among other uses. For this species, the high oil content affects the storage potential of seeds and associated with factors such as the pericarp, low availability of water in the soil can provide uneven germination. So, to reduce the nega-tive effects of the factors thatinterfere with crambe seed germination, it can be through the use of priming techniques. The objective of this research was to evaluate the efficiency of priming techniques in physiological quality of crambe seeds stored under controlled condi-tions. Therefore, the experiment was conducted in 2015 to 2016 period for crambe, classified seeds were used, treated, packed in paper bags krafts. After zero, three and six months of stor-age, the seeds were submitted to physiological primingtechniques, using the unmonitored hydration techniques (immersion in water), matriosmopriming with PEG 6000 -0.2 MPa, moist atmosphere and matripriming. Unconditioned seeds were used as control. The seeds were evaluated after drying by germination and vigor (first count, seedling performance, seedling emergence and electrical conductivity). From the results it can be concluded that the seeds subjected to matriosmoprimingand matriprimingpresent approximately 40% water content after 8 hours of imbibition. There was favoring the germination of seeds and dry mass of lot 1 after they have been submitted to matriosmoprimingat 0, three and six months. There was an increase of germination rate of seeds lot 3 which were submitted to matriprimingthe three and six months of storage.