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  • Thermogenic flowering of taro (Colocasia esculenta, Araceae)
    Ivančič, Anton, 1953- ...
    Thermogenesis and its association with taro (Colocasia esculenta (L.) Schott) floweing was studied during the warmest period of the zear (December 2002 - February 2003) within a large collection of ... heterogeneous plant material on Espiritu Santo, Vanuatu. On each studied inflorescence, temperatures of the three main parts of the spadix and the ambient air were recorded during a period of 38 h. The investigation indicates that significant thermogenic activitz of taro inflorescences takes place during two successive nights (1) during the night when an inflorescence becomes odorous (the female phase) and (2) a night later, when microsporogenesis approaches its final phase (the male phase). The highest average difference between mean temperatures of the ambient air and inflorescences were documented during the female phase, at 0500 hours (the mean temperature of the sterile appendix was 29.1+0.9 C (P=0.05) and this was 6.8 C above the temperature of the ambient air.) Thermogenic activity is synhronized with the protogynous nature of the speciesand insect pollination in the early morning hours. Its main putative functions are (1) to reduce the deviations of ambient air temperatures during the most critical periods of flowering, and (2) to promote cross-pollination. It stops 1-1,5 h after pollen has been released.
    Vir: Canadian journal of botany = Revue canadienne de botanique. - ISSN 0008-4026 (Letn.82, št. 11, 2004, str. 1557-1565)
    Vrsta gradiva - članek, sestavni del
    Leto - 2004
    Jezik - angleški
    COBISS.SI-ID - 2181164

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