Abstract
Three races of hydrilla observed to only produce turions were evaluated for photoperiod effects on propagule production. Greatest production was under shortdays (I 0-h). These races from Japan and Poland produced both turions and turion-like tubers under longday photoperiods (I 6-h) but production was most efficient under shortdays. Increased propagule production under shortdays may be compensation for decreasing photosynthetic activity at higher latitudes. Production appears only to be limited by temperature.
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Cook, C. D. K., 1985. Range extensions of aquatic vascular plant species. J. Aquat. Plant Mgmt. 23: 1–6.
Cook, C. D. K. &; R. Lüönd, 1982. A revision of the genus Hydrilla (Hydrocharitaceae). Aquat. Bot. 13: 485–504.
Lakashmanan, C., 1951. A note on the occurrence of turions in Hydrilla verticillata. Pres. J. Bomb. Nat. Hist. Soc. 49: 802–804.
Leopold, A. C. &; P. E. Kriedmann, 1975. Plant growth and development. McGraw-Hill, Co., N.Y., N.Y.: 545 pp.
Miller, J. D., W. T. Haller &; M. S. Glenn, 1993. Turion production by dioecious hydrilla in North Florida. J. Aquat. Plant Mgmt 31: 101–105.
Mitra, E., 1964. Contributions to our knowledge of Indian freshwater plants. 4. On some aspects of the morphological and anatomical studies of turions of Hydrilla verticillata (Linn. f.) Royle. J. Asiat. Soc. 6 (1-2): 17–27.
Nakamura, T. &; Y. Kadono, 1993. Chromosome number and geographical distribution of monoecious and dioecious Hydrilla verticillata (L.f.) Royle (Hydrocharitaceae) in Japan. Acta Phytotax. Gebot. 44: 123–140.
Spencer, D. F. &; G. G. Ksander, 1991. Comparative growth and propagule production by Hydrilla verticillata grown from axillary turions or subterranean turions. Hydrobiologia 222: 153–158.
Steward, K. K., 1997. Influence of photoperiod on tuber production in various races of hydrilla (Hydrilla verticillata). Hydrobiologia 354: 57–62.
Steward, K. K. &; T. K. Van, 1987. Comparative studies of monoecious and dioecious hydrilla (Hydrilla verticillata) biotypes. Weed Sci. 35: 204–210.
Steward, K. K., 1969. Effects of growth regulators and herbicides on germination of hydrilla turions. Weed Sci. 17: 299–301.
Thullen, J. S., 1990. Production of axillary turions by the dioecious Hydrilla verticillata J. Aquat. Plant Mgmt 28: 11–15.
Van, T. K., 1989. Differential Responses of photoperiods in monoecious and dioecious Hydrilla verticillata. Weed Sci. 37: 552–556.
Van, T. K., W. T. Haller &; L. A. Garrard, 1978. The effect of day length and temperature on hydrilla growth and tuber production. J. Aquat. Plant Mgmt 16: 57–59.
Van, T. K., W. T. Haller &; G. Bowes, 1976. Comparison of the photosynthetic characteristics of three submersed aquatic plants. Plant. Physiol. 58: 761–768.
Yeo, R. R., R. H. Falk &; J. R. Thurston, 1984. The morphology of hydrilla (Hydrilla verticillata (L.f.) Royle). J. Aquat. Plant Mgmt 22: 1–17.
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Steward, K.K. Influence of photoperiod on vegetative propagule production in three turion-producing races of Hydrilla verticillata (L.f.) Royle. Hydrobiologia 432, 1–8 (2000). https://doi.org/10.1023/A:1003875202266
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DOI: https://doi.org/10.1023/A:1003875202266