ISHS Acta Horticulturae 288: VI International Symposium on Pollination
THE POLLINATION OF WHITE LUPIN |
| Author: | Ingrid H. Williams |
| Abstract:
The flower of the white lupin (Lupinus albus L., cultivar Vladimir) is typically papilionaceous. The elongate anthers dehisce first, during anthesis, and shed their pollen into the keel. Growth of the filaments of the round anthers causes them to push this pollen into the apex of the keel where, by the time anthesis is complete, it surrounds the stigma. In the glasshouse five treatments were compared in which the flowers of each plant were: (i) left to autopollinate, (ii) shaken, (iii) tripped, (iv) self pollinated, or (v) cross pollinated. These treatments had no effect on the numbers of flowers, pods or seeds or weight of seed produced by the plants but did slightly shorten the duration of flowering, particularly when flowers were tripped or cross pollinated. Although treatments had no effect on the distribution of flowers, pods or seeds on the plant, the efficiency with which flowers developed into pods was clearly influenced by their position on the plant. White lupin flowers are highly self fertile and the stigmatic fringe of hairs is too short in this species to prevent automatic self pollination, which occurs efficiently during anthesis. | |
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