Morpho-ecological studies on geophilic plants: Vegetative reproduction inIris vartani (Iridaceae)
- 41 Downloads
Structure and behaviour of the underground organs ofIris vartani were investigated in connection with the vegetative reproduction of this species. Under favourable conditions, well developed mature plants give rise to two replacement bulbs and to several propagation bulblets each year. In spite of this considerable vegetative propagation, no crowding occurs at the natural habitat. Controlled experiments show that as soon as a small group is formed, each bulb produces only one replacement bulb and not two as before. Moreover, the bulblets do not sprout while they are attached to the respective mother bulbs, but rather die and disintegrate, remaining as empty peels. In contrast, detached bulblets, sown individually in separate pots, germinate readily. Consequently, the aggregates ofI. vartani do not increase to any great extent and thus ensure their survival “in situ” for many years.
Key wordsAngiosperms Iridaceae Iris vartani Bulb structure vegetative reproduction bulblet germination
Unable to display preview. Download preview PDF.
- Galil, J., 1958: Physiological studies on the development of contractile roots in geophytes. — Bull. Res. Counc. Israel6 D, 221–236.Google Scholar
- —, 1961: Kinetics of Geophytes (in Hebrew). — Tel Aviv: Hakibutz Hameuchad.Google Scholar
- —, 1962: Development cycle and ecology ofIris palaestina (Bak.)Boiss. — Bull. Res. Counc. Israel11 D, 17–24.Google Scholar
- —, 1965a: Vegetative dispersal ofAllium neapolitanum. — Amer. J. Bot.52, 282–286.Google Scholar
- Galil, J., 1965b: Vegetative dispersal ofAllium ampeloprasum L. I. Vegetative reproduction. — Israel J. Bot.14, 135–140.Google Scholar
- —, 1965c: Vegetative dispersal ofAllium ampeloprasum L. sprouting of bulblets. — Israel J. Bot.45, 184–191.Google Scholar
- —, 1968: Vegetative dispersal ofOxalis cernua. — Amer. J. Bot.55, 68–73.Google Scholar
- —, 1981: Kinetics of bulbous plants. — Endeavour5, 15–20.Google Scholar
- Rimbach, A., 1902: Physiological observations on the subterranean organs of CaliforneanLiliaceae. — Bot. Gaz.33, 401–408.Google Scholar
- Troll, W., 1937: Vergleichende Morphologie der höheren Pflanzen. — Berlin: Gebr. Borntraeger.Google Scholar