Older flower with the stamens (S) anther is developed o n the c orolla dried up.er(X2) dth e hairs before the filament, and when the latter is not produced, the anther is sessile, as in the mistletoe. another example sentences. The anther entire (a) with its filament; section of anther (b) showing the four loculi. Protogyny in M. grandiflora lies in a mechanism that determines the, 26. 3, The same, when disturbed by the entrance of the proboscis of the bee in the direction of the arrow; f, filament; c, connective; s, the obstructing half of the anther. Potato haploid induction has significant meaning in potato breeding, It includes parthenogenesis and, 29. To advertise the fact, they surround the pollen and the, 22. Below the anther the surface of the column in front is hollowed out into a greenish depression covered with viscid fluid - this is the two united stigmas. In such cases the contact of an insect or other body with those processes is sufficient to liberate the pollen often with elastic force, even when the anther itself is not touched. In the young state there are usually four pollen-sacs, two for each anther-lobe, and when these remain permanently complete it is a quadrilocular or tetrathecal anther (fig.

All Rights Reserved. What is an anther? The male parts of the flower are the stamens and the, 21. Sometimes the anther has a single cavity, and becomes unilocular, or monothecal, or dimidiate, either by the disappearance of the partition between the two lobes, or by the abortion of one of its lobes, as in Styphelia laeta and Althaea officinalis (hollyhock). - I, anther; 2, pollen grain of Hollyhock (Althaea rosea) enlarged. Under the microscope, an anther can be seen to have many spherical to ellipsoidal pollen grains on its surface. 12. When the anther lobes are rendered horizontal by the enlargement of the connective, then what is really longitudinal dehiscence may appear to be transverse. Last week's winner of the bragging rights can again brag for, The stigmas were then pollinated with pollen from a flower whose, This indicates that similar mechanisms may trigger, In maize, the stomium is located at the meeting point of the two loculi that make up each half, Asexual embryogenesis and plantlet development in, Owing to the gradual dehiscence of the thecae, at any time, syrphids could only access part of the pollen of each, Florets were removed from the middle third of the main rachis on fully emerged tassels prior to, In the experiments in Table 1, pricking of an, The distal end bears nine very short filaments, each terminating in a bilobed, Pollen, in monads or tetrads, is presented in the anthers, adhering to the, Lacking an extensive vacuolization phase, meiocytes of the same tetrads stay together until the, The fusion of the corolla lobes to a sympetalous corolla is late taking place by meristem incorporation and fusion across the backs of the, Large fields of green grassland can be seen, one after, The tapetum degenerates earlier than usual, resulting in high pollen sterility, and, Both species landed directly on the column but, while one scraped its abdomen against the anthers, the other introduced its glossa into the, When the promoter fragment was resolved into smaller portions, further elements could be identified that conferred root, pulvinus and, While leaving the flower, it pulls the pollinium out of the, The single cell layer of tapetum surrounding the, However, the species Eulophia foliosa has adaptation in the cap, Moggridge figures a flower of Ophrys insectifera in which the rostellate process was replaced by an, By pollination we mean the transfer of pollen from an, They consist usually of two parts, the Filament and, The ovule is a part of every ovary just as the pollen is a part of every, Sometimes the stamen has no filament, and the, In this flower the stigmatic surface is above the, Zhangjiajie also boasts another all-glass bridge that suspends 180 meters above, One of the organs of a flower, consisting of a filament and, Its body must be sufficiently large to come in contact with the, The portion of a stamen which connects the two cells of the, I suppose you were afraid I was going to give you. Botanists were for a long time content to know that the scattering of the pollen from the anther, and its application to the stigma, were necessary for the production of perfect seed, but the stages of the process of fertilization remained unexplored. The perianth consists of five or six oblong greenish lobes, within which is found a tuft, consisting of a large number of stamens, each of which has a very short filament and an oblong two-lobed anther bursting longitudinally, and surmounted by an oblong lobe, which is the projecting end of the connective. In Orchidaceae the stigma is situated on the anterior surface of the column beneath the anther. 74), where there are two, and Poranthera, where there are four; whilst in the mistletoe the anther has numerous pores for the discharge of the pollen. The endothecium varies in thickness, generally becoming thinner towards the part where the anther opens, and there disappears entirely. The plants produce bisexual flowers and, unlike Sagittaria, have, 24. Copyright © 2016 sentencedict.com All Rights Reserved Contact. anther development, so no pollen is produced. 2. Thus in Dicentra and Corydalis there are six stamens in two bundles; the central one of each bundle alone is perfect, the lateral ones have each only half an anther, and are really stipules formed from the staminal leaf.

The anther is developed before the filament, and is always sessile in the first instance, and sometimes continues so. Anther popular option is cantaloupe or honeydew wedges wrapped with prosciutto. In flowering plants, anther s produce pollen which contains male gametes, and the embryo sac within the ovary contains a female gamete. - Stamen, consisting of a filament (stalk) f and an anther a, containing the pollen p, which is discharged through slits in the two lobes of the anther.

- Stamen of Asclepias, showing filament f, anther a, and appendages p. Enlarged. 9, 2) the style elongates and the forked stigma occupies the same position as the anther in fig.

That part of the anther to which the filament is attached is the back, the opposite being the face.

How to use anther in a sentence.

Then the walls of the mother-cells are absorbed, and the pollengrains float freely in the fluid of the pollen-sacs, which gradually disappears, and the mature grains form a powdery mass within the anther. They are attracted to the flower by its colour or its perfume; they seek, collect or feed on its honey, and while so doing they remove the pollen from the anther and convey it to another flower, there to germinate on the stigma when its tubes travel down the style to the ovary where their contents ultimately fuse with the "oosphere" or immature egg, which becomes in consequence fertilized, and forms a seed which afterwards develops into a new plant (see article Angiosperms). Learn more. anther definition: 1. the part of a flower that contains pollen 2. the part of a flower that contains pollen. They grow flowers, but the male anthers are stunted or withered: Seed but no poll The division between the lobes is marked on the face of the anther by a groove or furrow, and there is usually on the face a suture, indicating the line of dehiscence. Copyright © 2020 LoveToKnow.

a, anther; s, pistil; st, style; v, stigmatic surface. - Quadrilocular or tetrathecal anther of the flowering Rush (Butomus umbellatus). Reword any phrase, rephrase any sentences, rewrite any expression. Anther parallel to this is a plan mooted for young men, whereby they may learn woodwork and metalwork skills and thereby sustain themselves. They do not represent the opinions of YourDictionary.com.

- Stamen of Lady's Mantle (Alchemilla), with the anther opening transversely.

The movements of the pollen-masses may readily be seen with the naked eye by thrusting the point of a needle into the base of the anther, when the disks adhere to the needle as they would do to the antenna of an insect, and may be withdrawn. The anther consists of lobes containing the minute powdery pollen grains, which, when mature, are discharged by a fissure or opening of some sort. The induction of body cell embryo and, 15. Floral diagram of typical orchid flower; 1, labellum; a, anther; s, rudiments of barren stamens (staminodes).

- Pollination I, Flower visited by a humblebee, showing the projection of the curved connective bearing the anther from the helmetshaped upper lip and the deposition of the pollen on the back of the humble-bee. These flowers possess spring-loaded anthers that give honey bees a rough blow when they enter. anther s but the shorter females are green.

c, The one-celled ovary cut a, The anther, con transversely, having three taining pollen parietal placentas. How to use another in a sentence. Occasionally there are numerous cavities in the anther, as in Viscum and Rafesia. The pollen-grains or microspores contained in the anther consist of small cells, which are developed in the large thick-walled mother-cells formed in the interior of the pollen-sacs (microsporangia) of the young anther.

The five anthers are remarkable for the coloured processes which extend beyond the anther cells and form a sort of cone around the style (fig. Anther definition is - the part of a stamen that produces and contains pollen and is usually borne on a stalk. When the filament is continuous with the connective, and is prolonged so that the anther-lobes appear to be united to it throughout their whole length, and lie in apposition to it and on both sides of it, the anther is said to be adnate or adherent; when the filament ends at the base of the anther, then the latter is innate or erect. In some Guttiferae, as Hebradendron cambogioides (the Ceylon gamboge plant), the anther opens by a lid separating from the apex (circumscissile dehiscence) . From the base of the inner part of the tube of the flower, but quite free from it, uprises a cylindrical stalk surrounded below by a small cup-like outgrowth, and bearing above the middle a ring of five flat filaments each attached by a thread-like point to an anther. (For further details on the form and arrangement of the flower and its parts, see Flower.) Recent Examples on the Web This transfers pollen from the male reproductive organs, called anthers, to the pistils, where pollination commences. In orchids each of the pollen-masses has a prolongation or stalk (caudicle) which adheres to a prolongation at the base of the anther (rostellum) by means of a viscid gland (retinaculum) which is either naked or covered. - The stamen of the Barberry (Berberis vulgaris), showing one of the valves of the anther (v) curved upwards, bearing the pollen on its inner surface. At the centre of each flower, the styles are a vivid orange, held well above the three golden yellow, 23. The word usage examples above have been gathered from various sources to reflect current and historial usage.