Substrate and temperature in germination of Jatropha mollissima (Euphorbiaceae)
2025 IHERINGIA SERIE BOTANICA 2025 80(卷), null(期), (null页)
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Due to the lack of information about the germination of J. mollissima in different conditions, the research aimed to determine the best combination between substrate and temperature for the germination of J. mollissima seeds. Were used four substrates (vermiculite, between paper, sand, and paper roll) and four temperatures (25, 30, 35 and 40 degrees C). Germination percentage (G), mean germination time (MGT), germination speed index (GSI) and relative frequency were calculated. There was no germination in the test conducted in 40 degrees C, as well as the paper roll substrate. 30 and 35 degrees C temperatures, obtained the best values for G (85.6 and 86.4), MGT (4.88 and 4.25) and GSI (4.7 and 5.25) on the vermiculite substrate. The most homogeneous frequency was observed on the substrate's vermiculite and sand. Vermiculite were the best options of substrate to germination of the J. mollissima, with temperature by 30 or 35 degrees C.
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