Pollination Sentence Examples

But the common agents for pollination are insects.

Pollination is effected by aid of insects.

The flowers contain honey, and attract flies, short-lipped bees or other small insects by the agency of which pollination is effected.

Effective pollination may also occur between flowers of different species, or occasionally, as in the case of several orchids, of different genera - this is known as hybridization.

If pollination does not occur, then you won't have any fruit.

The pollination, of flowers and the dispersal of seeds by various animals are biological factors; but pollination and dispersal by the wind cannot be so regarded.

Many are highly specialized so that pollination can be effected by a few species only.

An increasing number of workers in this field of plant biology in England, on the Continent and in America has produced a great mass of observations, which have recently been brought together in Dr Paul Knuth's classic work, Handbook of Flower Pollination, an English translation of which has been published (1908) by the Clarendon Press.

The study of the fertilization, or as it is now generally called "pollination," of flowers, was continued by Darwin and taken up by other workers, notably Friedrich Hildebrand, Federico Delpino and the brothers Fritz and Hermann Muller.

After pollination the female flower becomes drawn below the surface by the spiral contraction of the long stalk, and the fruit ripens near the bottom.

Gazette, xlvi., 1908, regards this tissue as belonging to the nucellus.) At the time of pollination the long tubular integument secretes a drop of fluid at its apex, which holds the pollen-grains, brought by the wind, or possibly to some extent by insect agency, and by evaporation these are drawn on to the top of the nucellus, where partial disorganization of the cells has given rise to an irregular pollen-chamber (fig.

More recently, researchers at the botanical garden of Heidekberg attempted for several years to achieve fruit-set in jasminum mesnyi by artificial pollination, but had no success.

Pollination of apple and other fruit trees is accomplished mostly by bees, so be sure not to kill them with insecticides when the flowers come into bloom.

For pollination purposes, they must not be over 50 feet apart.

Pollination is crucial to a plant's ability to produce fruit.

In function the perianth may be compared with a unilocular ovary containing a single ovule; the projecting integument, which at the time of pollination secretes a drop of liquid, serves the same purpose as the style and stigma of an angiosperm.

This will let you know what varieties to plant together to aid fertilization and pollination, along with specific growing conditions.

The purpose of this style of planting is to help with pest control, pollination, and to increase the harvest.

Today scientists and biologists are working together to perfect robobees for cross pollination and to help find survivors after disasters.

In the case of aquatic plants with aerial flowers, the latter obey the ordinary laws of pollination.

The method of pollination is to some extent governed by the distribution of the stamens and pistil.

Before following the growth of the pollen-grain after pollination, we will briefly describe the structure of a cycadean ovule.

Stratiotes has similar flowers which come above the surface only for pollination, becoming submerged again during ripening of the fruit.

In the second case the outer series (calyx of sepals) is generally green and leaf-like, its function being to protect the rest of the flower, especially in the bud; while the inner series (corolla of petals) is generally white or brightly coloured, and more delicate in structure, its function being to attract the particular insect or bird by agency of which pollination is effected.

Pollination having been effected, and the pollen-grain having reached the stigma in angio sperms or the summit of the nucellus in mnos erms P gY P it is detained there, and the viscid secretion from the glands of the stigma in the former case, or from the nucellus in the latter, induce the protrusion of the intine as a pollen-tube through the pores of the grain.

Some have the stigma, to which the pollen adheres during pollination, like a little pinhead protruding from the flower.

Not only do insects aid in the pollination of plants, they also help to break down organic matter in the soil.

Seeds of Change also develops original varieties of plants using traditional methods of cross pollination and choosing only the most vigorous plants from which to collect seed.

They serve various purposes in the economy of the flower, often closing the way to the honey-secreting part of the flower to small insects, whose visits would be useless for purposes of pollination.

Think of the possibilities if we could reduce pollination of weeds and intrusive vegetation.

The South American Brazil nut tree is dependant on carpenter bees for its pollination.

The plant emits a stench to attract decaying flesh-eating beetles, flies and sweat bees for pollination.

However, there are things that can be done to help the bumblebee to continue its age-old task of pollination.

It combines the perspectives of molecular genetics, evolutionary biology and pollination ecology.

The seed is set free from the parent plant and serves as the means of dissemination (see FLOWER; POLLINATION; FRUIT, and SEED).

The sporophylls (stamens and carpels) are generally associated with other leaves, known as the perianth, to form a flower; these subsidiary leaves are protective and attractive in function and their development is correlated with the transport of pollen by insect agency (see ANGI0sPERM5; POLLINATION, and FLOWER).

The great variety in the form, colour and scent of flowers (see Flower) is intimately associated with pollination which is effected by aid of wind, insects and other agencies.

In the case of unisexual flowers, whether monoecious, that is, with staminate and pistillate flowers on one and the same plant, such as many of our native trees - oak, beech, birch, alder, &c., or dioecious with staminate and pistillate flowers on different plants, as in willows and poplars, cross pollination only is possible.

This is associated with the fact, so ably demonstrated by Darwin, that, at any rate in a large number of cases, cross-pollination yields better results, as measured by the number of seeds produced and the strength of the offspring, than self-pollination; the latter is, however, preferable to absence of pollination.

The scientific agricultural community believes that modifying seeds, controlling pollination, and creating hybrids produces a more durable food supply and provides higher yields.

Pollination in cycads has always been described as anemophilous, but according to recent observations by Pearson on South African species it seems probable that, at least in some cases, the pollen is conveyed to the ovules by animal agency.

The ovule is usually surrounded by one integument, which projects beyond the tip of the nucellus as a wide-open lobed funnel, which at the time of pollination folds inwards, and so assists in bringing the pollen-grains on to the nucellus.

The long tentacles of the integument may have served to facilitate pollination.

The use of certain creatures for pollination can be highly specific.

There is a close relation between the pollination of many yuccas and the life of a moth (Pronuba yuccasella); the flowers are open and scented at night when the female moth becomes active, first collecting a load of pollen and then depositing her eggs, generally in a different flower from that which has supplied the pollen.

It is also probable that the various forms of the angiospermous flower, with its many specialized mechanisms for pollination, may be the result of insect-visits, the flowers becoming adapted to certain kinds of insects, and the insects having undergone corresponding modification.

The flowers are hermaphrodite and regular, with the same number and arrangement of parts as in the order Liliaceae, from which they differ in the inconspicuous membranous character of the perianth, the absence of honey or smell, and the brushlike stigmas with long papillae-adaptations to wind-pollination as contrasted with the methods of pollination by insect agency, which characterize the Liliaceae.