VIABILITY AND GERMINATION TESTS OF FRINGED GENTIAN, GENTIANA THERMALIS (O. KUNTZE) ILTIS

in HortScience

Fringed gentian, Gentiana thermalis (O. Kuntze) Iltis is an attractive wildflower, that may be used as a fall flowering ornamental. This species has received limited attention in terms of seed viability and germination. Seeds were subjected to a tetrazolium viability test that involved imbibition for 24 hours at 22C. No embryos in any line tested were stained. However, imbibition at 3C for up to 4 weeks followed by staining at 22C resulted in significant levels of positive viability, as indicated by embryo staining. A germination study indicated that stratification was necessary for germination, with 6 weeks chilling giving better results than 0 or 3 weeks. However, the number of seeds germinated was less than expected, given the results of the tetrazolium test.

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