Abstract
The thermogenesis and flowering biology of Colocasia gigantea (Blume) Hook. f. were studied from December 2005 to February 2006 on Espiritu Santo, Vanuatu (South Pacific). Endogenous thermogenesis was measured in two ways: (1) continuously over 5-day periods, and (2) over 3 h during maximum heating. The study showed that heat was generated by the male part of the spadix and probably the lower zone of the sterile region. The temperatures of the male part peaked twice: (1) between 0625 and 0640 (during the female phase) and (2) 24 h later (during the male phase). The average maximum temperature was 42.25 ± 0.14°C during the female phase (16.63°C above the ambient temperature) and 35.14 ± 0.22°C during the male phase (10.61°C above the ambient temperature). In the lower zone of the sterile region, thermogenesis was documented only during the female phase. The average maximum temperature was 35.44 ± 0.41°C (9.82°C above the ambient temperature). Thermogenic heating appeared to be closely associated with the activities of pollinating insects.
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Ivancic, A., Roupsard, O., Garcia, J.Q. et al. Thermogenesis and flowering biology of Colocasia gigantea, Araceae. J Plant Res 121, 73–82 (2008). https://doi.org/10.1007/s10265-007-0129-5
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DOI: https://doi.org/10.1007/s10265-007-0129-5