Sinningia lineata is a rock growing plant, with ornamental potential, which is in danger of extinction. This study aimed at analyzing the germinative behavior of the S. Ilineata in different substratums and light conditions. The results should contribute to the sexual propagation aiming at the conservation ex situ, as well as to offer a subsidy for its inclusion as an ornamental plant. The seeds were collected in situ. Six substrata were tested in presence and absence of light incidence: blotting paper, medium river sand, commercial substratum, mixture in the proportion of 1:1 of sand with carbonated rice husk, sand with commercial substratum, and carbonated rice husk with commercial substratum. The temperature was of 20ºC. The technical concept of germination was adopted, development of normal plantlets. The results indicated that the lot had a high germination capability, which was demonstrated by the high germination percentage on the paper (92,5%). The germination and vigor tests indicated that among the studied substrata, the blotting paper and sand were the best. The germination percentage in sand was 90% and did not differ statistically from the percentage of germination on paper. The other substrata were not considered adequate for seed germination of the species. The chemical analyses of the commercial substratum presented high salinity levels, which caused a gradual loss of seedlings, indicating that the species is sensitive to this chemical condition. The test with light demonstrated that the species is a positive photoblastic.
Sinningia lineata; endangered species; ornamental species; native species; vigour
