We might have taken the case of insects visiting flowers for the sake of collecting pollen instead of nectar; and as pollen is formed for the sole object of fertilisation, its destruction appears a simple loss to the plant; yet if a little pollen were carried, at first occasionally and then habitually, by the pollen-devouring insects from flower to flower, and a cross thus effected, although nine-tenths of the pollen were destroyed, it might still be a great gain to the plant; and those individuals which produced more and more pollen, and had larger and larger anthers, would be selected.
Some holly-trees bear only male flowers, which have four stamens producing rather a small quantity of pollen, and a rudimentary pistil; other holly-trees bear only female flowers; these have a full-sized pistil, and four stamens with shrivelled anthers, in which not a grain of pollen can be detected.
The workshop will also provide visitors with a clear view of the process of pollination where pollens are transferred from the anthers
to the stigma, creating offspring for the next generation.
This Lonicera purpusii Winter Beauty is a semi-evergreen and very fragrant honeysuckle, whose white flowers with prominent yellow anthers
continue into early spring.
It produces white flowers with prominent yellow anthers
from winter into early spring.
Determination of mean value was based on ten anthers
collected from 25 tagged flowers belonging to five different individuals.
Well mel ahead Pollinate the female flowers of melons as they appear by picking off a mature male flower and placing the pollen bearing anthers
close to the spiky female pistil in the centre.
These archesporial cells could be recognizable by their large volume, dense cytoplasm and conspicuous nuclei, and appeared at the corners of young anthers
of the native bluebells are white and it is fragrant unlike the Spanish imposter.
5 cm long, glabrous, anther
tube obconic, 4-5 mm long and 4 mm in distal diameter, exserted 10-15 mm between the corolla dorsal lobes, dorsal and lateral anthers
4-5 mm long, the two ventral anthers
3-4 mm long, glabrous; stigma bilobed, discoidal during post-anthesis and exserted 3-4 mm from the anther
Cold pretreatment of anthers
at 4C up to 48 hours and cultures under dark conditions significantly enhanced callus induction (71% and 45%) response compared with cultures under long days on MS media supplemented with NAA and BAP (3.
Microspores and pollen grains are produced from pollen mother cells (Microsporocytes), PMCs within loculus anthers
of the flower.