Open Access CAAS Agricultural Journals Journal of Forest Science

The effect of the Sequoiadendron giganteum (Lindl.) Buchholz cone crystals on germination

Hana Prknová

https://doi.org/10.17221/43/2019-JFSCitation:Prknová H. (2019): The effect of the Sequoiadendron giganteum (Lindl.) Buchholz cone crystals on germination. J. For. Sci., 65: 203-208.
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The cones of the giant sequoia contain red, water-soluble crystalline substances known as cone crystals. The inhibitory effect of this extracted material on Norway spruce, Scots pine and European larch germination was newly examined. Sown seed representative samples without and with added cone crystals were compared after their incubation in the same appropriate conditions. All these cases have brought compelling evidence that cone crystals totally inhibit germination. However, the chemically inhibited seeds being rinsed afterwards germinated very well. This switch effect caused by the cone crystals of the three above-mentioned conifers proved to be a nonspecific tool. Seeds of the giant sequoia, naturally affected by the cone crystals, were sown as rinsed and non-rinsed samples. Both the samples, grown on a wet peat substrate in appropriate conditions for 16 weeks, exhibited an equal, yet very low viability of 1.3% at the same time. This low number, fixed in seeds of the tree being far from the ecological optimum, does not allow any disputation with other authors.

Keywords:

cone pigment; giant sequoia; inhibitory effect; tannin

References:
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Hana Prknová (2018): Contribution to seed ecology of Sequoiadendron giganteum (Lindl.) Buchholz growing in the Central European conditions. Journal of Forest Science, 64, 86-90  https://doi.org/10.17221/148/2017-JFS
 
Stark N. (1968): Seed ecology of Sequoiadendron giganteum. Madroño, 19: 267–277.
 
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