Acta Botanica Croatica, Vol. 33 No. 1, 1974.
Original scientific paper
Photoperiodic Responses of Lemnaceae from Northeastern Slovenia
Božo Krajnčić
; Slovenija
Abstract
Photoperiodic responses of Lemnaceae, collected from the region northeastern Slovenia, have been investigated under experimental conditions. The axenic cultures were grown in a modified Pirson-Seidel solution at an illuminating intensity of 3 000 lx and a temperature of 28 ± 1° C in plant cabinets under controlled conditions. The investigations have given the following results.
1. Spirodela polyrrhiza (Odranci) is a photoperiodically neutral plant, which produces inflorescences in the left reproductive pouch. Its flowering is considerably stimulated by the addition of iron salt of EDTA (10 m./l) at pH = 4.8.
2. Lemna gibba (Odranci) is under the given conditions a long-day plant, which produces inflorescences in the right pouch only. The convex fronds are developed during long days only. Under short dav conditions the fronds are flat and similar to those of L. minor.
3. Lemna minor (Trije ribniki — Maribor) is also x long-day plant, which develops its inflorescences in the right pouch.
4. A short-day preculture (of at least 14 days) stimulates flowering in all three investigated species, especially in Spirodela.
5. At the given experimentáis conditions in Lemna trisulca (Mure- tinci) and Woljfia arrhiza (Petanjci), grown also in axenic cultures, it has not been possible to induce flowering up to now.
Keywords
Hrčak ID:
157916
URI
Publication date:
31.12.1974.
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