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- W49147708 abstract "Floral phenology, pollination biology and breeding systemwere studied in Aristolochia tagala Cham (Aristolochiaceae) grown under ex situ conditions. The flower exhibits structural features typical of fly-trap mechanism described for other Aristolochia species. Flowers show pronounced protogyny. Stigmas are receptive at anthesis and remain so for 24 h. Anthers dehisce 45–48 h after anthesis by which time stigma receptivity islost. Chironomid fly (Diptera) is the pollinator. Attracted by the odour and colour of the flower, the flies enter it and are detained in the chamber of the perianthtube (where the anthers and stigma are located)for nearly 50 h. Their escape is prevented by the presence of dense downward-pointing hairs in the perianthtube. The nectaries provide food to the insects. Following anther dehiscence, the thorax of the fliesbecomes loaded with sticky pollen grains. Hairs on theinner wall of the perianth tube wither and facilitatethe exit of the flies. When a fly carrying the pollen load enters a fresh flower, it brings about pollination.Manual pollinations showed that the species permitsgeitonogamous pollination. The percentage of fruit setin manually pollinated flowers is higher than that resulting from open pollination, confirming that pollination is a limitation for fruit set in the ex situ-grown population. Nevertheless, fruit and seed set is sufficiently high for ex situ conservation purposes." @default.
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- W49147708 date "2006-01-01" @default.
- W49147708 modified "2023-09-26" @default.
- W49147708 title "Pollination biology of Aristolochia tagala, a rare species of medicinal importance" @default.
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