Steward, K.K., 2000. Influence of Photoperiod on Vegetative Propagule Production in Three Turion-Producing Races of Hydrilla verticillata (L.f.) Royle, ARS, USDA.

Reprinted from Hydrobiologia (2000) 432 1-8 with kind permission from Springer Science and Business Media

Influence of Photoperiod on Vegetative Propagule Production in Three Turion-Producing Races of Hydrilla verticillata (L.f.) Royle

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.

Entire Paper
Contact: Kerry Steward, ARS, USDA, Aquatic Plant Management Lab, 3205 College Avenue, Ft. Lauderdale, FL 33314
Key Words: Hydrilla, Basic_biology
Product Type: Research, Basic_biology
User Type: General