IMPACT FACTOR 2016
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Journal of Apicultural Science
 
Abstract:

Study on flowering biology and seed sets of selected ornamental species from the Malvaceae family

Journal of Apicultural Science. Volume 53, Issue 1, Pages 29-36, ISSN (Print) 1643-4439
The investigations were carried out at the Botany Department of the Life Sciences University in Lublin, Poland (51° 14' N 22° 34' E) in the years 1992-2004. The objects of the study were four ornamental, annual species of the Malvaceae family. Each were examined during three vegetation seasons. The species were: Alcea rosea L., Malope trifida Cav., Malva mauritiana L. and Malva moschata L. The observations were focused on the time and length of the flowering period. The observations were focused, as well, on some morphological features of the flowers and seed sets when allowed free access by pollinating insects, and when the flowers were isolated.
In the climatic conditions of Lublin, the flowering period of the investigated species started in June or early July (Malope trifida) and lasted till late September (10.5-15.5 weeks). A single flower blooms for 2.5-5.5 days. During the vegetative season, one plant developed an average of 243-1374 flowers.
The flowers consist of numerous stamens forming a staminal tube which encloses the gynoecium. Depending on the species, one flower develops an average of from 62.5 (Malva moschata) to 309.1 (Alcea rosea) stamens. The number of ovules in one flower fluctuated between 9.7 (Malva mauritiana) to 54.3 (Malope trifida).
Seed setting was strictly dependent on insect pollination. When allowed free access by pollinating enthomofauna, the flowers of the examined malvaceous developed 70.5-89.7% of seeds. In isolation only 2.8-10.4% of the seeds were developed.
Keywords:
Malvaceae, flowering, flower morphology, seed setting
 
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