Abstract
The research on the blooming ecology and the flower morphology of <i>Hypocyrta glabra</i> Hook. (Gesneriaceae) cultivated in laboratories and outdoors have been carried out. The life span of flowers and morphological changes in successive phases of the blooming period have been observed. The <i>H. glabra</i> flowers are protandrous and the stamens translocate during the flowering process. The macro- and microstructure of calyx, corolla, androecium, gynoecium and nectaries have been analyzed. The size, shape and viability of pollen grains have been designated and their number per stamen head has been calculated. The location of nectaries in <i>H. glabra</i> flowers has suggested that they stem from the 5<sup>th</sup> stamen during phylogenesis. It has been proved that the nectaries are provided by numerous vascular bundles and that the nectar is secreted by stomata. The stomatal field comprises 2/5 of nectary height and is situated on the abaxial side of the apix part. The average number of stomata is 63.2 per 1 mm<sup>2</sup>. The average amount of nectar produced by 10 flowers in their fourth day of life reached 223.7 mg. The sugar concentration was 32.7%. Numerous glandular and non-glandular trichomes have been noticed on the surface of calyx, corolla and gynoecium, which indicate the xeromorphic adaptation of the flower. It has been observed that the numbers of glandular and non-glandular trichomes per unit of the external surface of corolla are similar. Outdoors the secretion produced by calyx and corolla glands was willingly collected by wasps. It seems that such features of <i>H. glabra</i> flowers as position, shape and colour of corolla, the abundance of the nectar and pollen produced are connected with their adaptation to pollination by humming-birds in the species natural environment.
Highlights
S1 po3o¿one na rolinie równolegle do pod3o¿a lub te¿ s1 lekko wzniesione do góry
Wydaje siê, ¿e niektóre cechy budowy kwiatu H. glabra, takie jak po3o¿enie w przestrzeni, kszta3t i barwa korony, obfitoæ nektaru i py3ku zwi1zane s1 z jego przystosowaniem do zapylania przez kolibry w ojczynie wymienionej roliny
Summary
Summary The research on the blooming ecology and the flower morphology of Hypocyrta glabra Hook. Numerous glandular and non-glandular trichomes have been noticed on the surface of calyx, corolla and gynoecium, which indicate the xeromorphic adaptation of the flower. Outdoors the secretion produced by calyx and corolla glands was willingly collected by wasps It seems that such features of H. glabra flowers as position, shape and colour of corolla, the abundance of the nectar and pollen produced are connected with their adaptation to pollination by humming-birds in the species natural environment. Wyniki zamieszczone w niniejszej pracy dotycz[1] ekologii kwitnienia oraz morfologii i anatomii kwiatów H. glabra. Badania nad biologi[1] kwitnienia Hypocyrta glabra Hook., z uwzglêdnieniem makro- i mikrostruktury kwiatów, przeprowadzono w latach 2004-2005. S1 po3o¿one na rolinie równolegle do pod3o¿a lub te¿ s1 lekko wzniesione do góry (ryc. 1 A), niezale¿nie od kierunku wzrostu pêdu
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