Viability study of seeds of candeia Eremanthus erythropappus (DC.) MacLeish by germination and x-ray tests.

Abstract

Eremanthus erythropappus (DC.) is a forest species, with multiples as oil extraction activity. As they have a seed with low percentage of germination, the aim of this study was to improve seeds quality of candeia. So, it had been carried out an experiment, using seeds from Carrancas, Itabirito, Morro do Pilar, Baependi and Delfim Moreira, using a randomized block with four repetitions. Germination test was carried out with temperatures of 20º-30º C/ 10 and 14 hours light, being evaluated at 14^th days, non-germinated seeds were dried to check the presence or not and embryo state, being divided in firm, dead and empty seeds. Seeds of the same progenies by germination test were subjected to x-ray analysis. It had been selected two progenies of each tests (germination and x-ray); these seeds were winded and portion was subjected to x-ray and germination tests. To the evaluated features, progenies C6, I18, M24, B9 and D2 had better quality, according to germination and empty seed. Progenies C25, I17, M22, B24 and D16 were treatments which shwed the lowest means, respectively. After treatments with wind, it had been noted progenies reached a higher number of firm seeds, giving an increment on germination of 9% to I12 and 47% to B24. A low germinative percentage can be reasonable by a high number of empty aquenious.