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

To chci

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. … celý popis

Podrobná bibliografie

Hlavní autor

Hana Prknová, 1978-

Typ dokumentu

Články

Fyzický popis

6 ilustrací

Publikováno v

Journal of Forest Science. -- ISSN 1212-4834. -- Roč. 65, č. 6 (2019), s. 203-208

Témata

SILVICULTURE

FOREST TREES

SEQUOIADENDRON

CONES

PIGMENTS

SECONDARY METABOLITES

GERMINATION INHIBITORS

LABORATORY EXPERIMENTATION

PICEA ABIES

PINUS SYLVESTRIS

LARIX DECIDUA

Seed germinability

Seed viability

POT EXPERIMENTATION

pěstování lesů

lesní stromy

sekvojovec

šišky

pigmenty

sekundární metabolity

inhibitory klíčení

laboratorní pokusy

smrk ztepilý

Pinus sylvestris

modřín opadavý

klíčivost semen

životaschopnost semen

nádobové pokusy

Popis jednotky

2 fotografie, 1 grafy, 3 tabulky

Bibliografie

Literatura na s. 208,