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Topics referred to by the same term
Pollen sac may refer to: Structures in plants that hold pollen Bee pollen, sacs or balls of pollen packed by bees This disambiguation page lists articles
Pollen_sac
Grains containing the male gametophytes of seed plants
surrounded by layers of sterile cells that grow into the wall of the pollen sac. Some of the cells grow into nutritive cells that supply nutrition for
Pollen
Reproductive structure in flowering plants
microspores and megaspores—the precursors to pollen and embryo sacs respectively. Pollen and embryo sacs are the male and female gametophytes, sex cell-producing
Flower
Reproductive organ on conifers
microsporangia (pollen sacs).[citation needed] The female cone (megastrobilus, seed cone, or ovulate cone) contains ovules which when fertilized by pollen become
Cone_(botany)
Extinct order of seed plants
angiosperm flowers. Pollen is often enclosed in paired synangia (pollen sacs). The synangia lie on the adaxial (inner) edge of pollen-bearing leaf-like
Bennettitales
Sporangia that produce spores that give rise to male gametophytes
two-lobed. Each anther lobe develops two pollen sacs, so each anther has four pollen sacs. Development of pollen sacs begins with the differentiation of archesporial
Microsporangium
Subfamily of flowering plants
Amaranthaceae. The stamens have anthers with only one lobe (locule) and two pollen sacs. Many species show C4-photosynthesis pathway. The center of diversity
Gomphrenoideae
Subfamily of flowering plants
Amaranthaceae. The stamens have anthers with two lobes (locules) and four pollen sacs. The main distribution of the subfamily is in tropical America, in tropical
Amaranthoideae
Study of flower structures
that each anther contains one or two pollen sacs extending along its entire length. After the maturation of the pollen grains, dehiscence, or opening, of
Floral_morphology
Genus of flowering plants
is accomplished in an unusual manner. Pollen is grouped into complex structures called pollinia (or "pollen sacs"), rather than being individual grains
Asclepias
Species of orchid
Charles Darwin remarked on the ability of the species to launch its viscid pollen sacs with explosive force, when an insect touches a seta. He was ridiculed
Catasetum_saccatum
Sheath or covering
also known as pollen sacs. The microsporangia produce the microspores, which for seed plants are known as pollen grains. If the pollen sacs are not adjacent
Theca
Male reproductive organs of a flower
microsporangia. The microsporangia form sacs or pockets (locules) in the anther (anther sacs or pollen sacs). The two separate locules on each side of
Stamen
Complex fertilization mechanism of flowering plants
or megagametophyte, also called the embryonic sac, with two male gametes (sperm). It begins when a pollen grain adheres to the stigmatic surface of the
Double_fertilization
Extinct genus of bennettitalean plant
symmetrical outward projecting rays, to which are attached bivalve-shaped pollen sacs/synangia. The number of rays varies from 9/10 to 30, depending on the
Weltrichia
Small land plant spores that develop into male gametophytes
These develop into pollen grains, each consisting of four cells and, in conifers, a pair of external air sacs. The air sacs give the pollen grains added buoyancy
Microspore
Form of pollination
Chinese herb Caulokaempferia coenobialis a film of pollen is transported from the anther (pollen sacs) by an oily emulsion that slides sideways along the
Self-pollination
Plant species in the plantain family
reach or extend slightly beyond the opening of the flower tube. The pollen sacs at the end of the stamens are 0.6–1.2 millimeters in diameter. The hairy
Penstemon_caespitosus
Subfamily of flowering plants
in subfamily Amaranthoideae). Anthers are with only one lobe and two pollen sacs (bilocular, like in subfamily Gomphrenoideae). In fruit, the tepals are
Polycnemoideae
Extinct order of plants
were like pollen of pine trees. They were produced in pollen sacs in coalesced groups of four, attached to branching structures. The pollen sacs hang off
Caytoniales
Family of flowering plants
The anthers have two or four pollen sacs (locules). In tribe Caroxyloneae, anthers have vesicular appendages. The pollen grains are spherical with many
Amaranthaceae
Specialised layer of cells the anther of flowering plants
important for the nutrition and development of pollen grains and a source of precursors for the pollen coat. The cells are usually bigger and normally
Tapetum_(botany)
Witch-hazel, a shrub or small tree
revealing one pollen sac. The two genera, Exbucklandia and Hamamelis are known to have this anther type. Plants of the Hamamelidaceae have sticky pollen, which
Hamamelidaceae
Biological process occurring in plants
Pollination is the transfer of pollen from an anther of a plant to the stigma of a plant, later enabling fertilisation and the production of seeds. Pollinating
Pollination
Species of virus
transmission within the pollen. A fluorescent in situ hybridization (FISH) study performed by Shargil et al., 2015 does show CGMMV in the pollen sac but finds none
Cucumber green mottle mosaic virus
Cucumber_green_mottle_mosaic_virus
in which pollen is produced in flowering plants. It consists of two fused sporangia known as pollen sacs. The wall between the pollen sacs disintegrates
Glossary_of_botanical_terms
Plant flower structures
during which the plant attaches pollen sacs onto its back. The escaped bee will visit another orchid and drop the pollen, fertilising it. This is another
Pollination_trap
Species of moth
her legs. The day-flying female is said to mimic a bee, complete with pollen sacs, and the male mimics a wasp. Larvae live on the underside of the leaves
Phobetron_pithecium
Evolutionary strategy
around 60% of pollinations. Depending on the morphology of the flower, a pollen sac called a pollinium is attached to the head or abdomen of the male. This
Mimicry
Family of conifers
to 20 elongated pollen sacs attached to the lower surface at one end. The pollen grains are round and do not possess wings or air sacs. Female cones are
Araucariaceae
Union of opposite-sex gametes in sexual reproduction to form a zygote
opening in the ovule wall) and the pollen tube "bursts" into the embryo sac, releasing sperm. The growth of the pollen tube has been believed to depend
Fertilisation
Reproduction via or production of spores
pollen sacs, which contain the microsporocytes. After meiosis, each microspore undergoes mitotic cell division, giving rise to multicellular pollen grains
Sporogenesis
Genus of orchids
directly under the lip. Each of the two anthers holds a pair of yellow pollen sacs called pollinia, which are held together by a viscid substance. The fruit
Hammarbya
Female plant reproductive structure
the pollen tube. Three antipodal cells form on the opposite (chalazal) end of the ovule and later degenerate. The large central cell of the embryo sac contains
Ovule
Extinct family of seed ferns
fronds. The pollen-producing organs (fossil genus Idanothekion) consisted of small, radially symmetrical synangia, with each pollen-sac having a longitudinal
Callistophytaceae
Fossil pollen organ of seed fern
species of Pteruchus in small size, and equant blade supporting the pollen sacs. Pteruchus africanus may have been produced by the same plant as Umkomasia
Pteruchus_africanus
Extinct family of plants
this family reproduce by sporangia and others only produce ovule or pollen sacs. Meyen, Sergei V. (1984). "Basic Features of Gymnosperm Systematics and
Williamsoniaceae
Genus of seed ferns
bears one or many synangia, each composed by four, partially fused, pollen sacs. Caytonanthus in the Paleobiology Database Caytonanthus T.M. Harris,
Caytonanthus
Pollen – Stamen – Anther – the distal end of the stamen where pollen is produced, normally composed of two parts called anther-sacs and pollen-sacs (thecae)
Glossary_of_plant_morphology
Extinct genus of ferns
pollen sacs on their inner surface. This structure bear similarities to Pteruchus (the pollen organ of corystosperm seed ferns), Antevsia (the pollen
Ptilozamites
Tubular structure to conduct male gametes of plants to the female gametes
A pollen tube is a tubular structure produced by the male gametophyte of seed plants when it germinates. Pollen tube elongation is an integral stage in
Pollen_tube
Yew family of conifers
shed pollen in the early spring. They are sometimes externally only slightly differentiated from the branches. The fertile bracts have 2-8 pollen sacs. The
Taxaceae
Species of plant
There are up to four fertile stamens, each bearing anthers with a single pollen sac. The capsule seed is 5-6 mm in size and ovoid or pyriform in shape. B
Buchnera_floridana
Genus of orchids
American species, discussed by Darwin, actually launches its viscid pollen sacs with explosive force, when an insect touches a seta. He was ridiculed
Catasetum
Genus of conifers
spirally inserted microsporophylls each with two basal pollen sacs producing bisaccate pollen. The female seed cones are solitary. Their peduncles may
Afrocarpus
Genus of coniferous trees
around it. Each triangular microsporophyll has two basal pollen-producing pollen sacs. The pollen is bisaccate. The seed cones are highly modified with the
Podocarpus
Genus of conifers in the family Podocarpaceae
triangular or apiculate in shape. Each of them has two basal pollen sacs with bisaccate pollen. The seed cones are solitary and have long peduncles. They
Nageia
Book by Richard Dawkins
falls into the liquid; as it escapes from the orchid, it deposits its pollen sacs on the bee’s back. Orchids present endless examples of coevolution, by
Climbing_Mount_Improbable
Species of eucalyptus
and the anther, two pollen sacs located at the top of the stamen. The anther sacs open into longitudinal slits to release their pollen. These filaments will
Eucalyptus_camaldulensis
Haploid stage in the life cycle of plants and algae
each mature pollen grain varies between the gymnosperm orders. Cycadophyta have 3 celled pollen grains while Ginkgophyta have 4 celled pollen grains. Gnetophyta
Gametophyte
Portion of sterile tissue between thecae
when the whole of the interior of the end of the stamen is converted into pollen. In some cases, the tissue has appendages of various shapes that are of
Connective_(botany)
Genus of conifers
no stalks. They grow into an upward, decreasing beak with two to six pollen sacs at the base of the cone. The female cones are small and stalkless and
Widdringtonia
Extinct family of seed ferns
large branching structures (Umkomasia). The pollen organ (Pteruchus) has numerous cigar-shaped pollen sacs hanging from epaulette-like blades, again in
Corystospermaceae
Species of flowering plant
7 mm long by 1.6 mm wide. There 6 yellow antheres, each consisting of 4 pollen sacs, and 6 green stigmatic lobes. The fruits are pendulous, cucumber-like
Pararistolochia_enricoi
Species of bee
anthers of the flowers, thereby shaking the pollen from the anthers to be collected in the individual's pollen sacs. Because of their small size, B. vancouverensis
Bombus_vancouverensis
Biological process
this can occur while the pollen forms in the anther (pollen tricellular) or after pollination and growth of the pollen tube (pollen bicellular in the anther
Gametogenesis
Species of coniferous tree
green in colour, and is 2–2.5 mm long. At its base, it holds two yellow pollen sacs. Fruiting takes over a year to mature and often coincides with the presence
Dacrydium_cupressinum
inconspicuous. Male cones small, solitary and terminal with crimson pollen sacs. Female cones spherical, about 4 mm (0.16 in), with two pairs of scales
Tasmanian coniferous shrubbery
Tasmanian_coniferous_shrubbery
Species of flowering plant
the flower tube and have black flattened and spread out anther sacs. Each pollen sac is 0.1–1.1 mm in size and opens completely. The staminode is 8–9 mm
Penstemon_albidus
Species of flowering plant
triangular anthers on short broad filaments. An anther consists of four pollen sacs, two on each side, with a small sterile central connective. The anthers
Amborella
Species of conifer
between 6 and 16 microsporophylls present with each containing with 3 or 4 pollen sacs. The seed cones are borne together in groups of 3 to 6. They are pedunculate
Cephalotaxus_fortunei
Extinct species of conifer
from isolated pollen cones, with further papers released on the leaves, ovulate cones, branches, and mycorrhizal root communities. The pollen cones are known
Metasequoia_milleri
Species of plant
Sanmiguelia. The pollen-bearing organs consist of an axis with many helically arranged microsporophylls, each with a pair of pollen sacs. The ovule-bearing
Sanmiguelia
1991 television film
orchid bees. The orchid traps the bee; as it escapes from the orchid, its pollen sac sticks to the bee. He notes that bats, which navigate through echolocation
Growing_Up_in_the_Universe
Species of flowering plant
boat shaped (navicular) pollen sacs, which are between 1.2 and 1.5 mm and do not completely split open to release the pollen. The staminode is 13–16 mm
Penstemon_auriberbis
Species of honey bee
memory; they are also used in studies of pesticide toxicity, especially via pollen, to assess non-target impacts of commercial pesticides. The western honey
Western_honey_bee
Species of cycad
the sporophyll are several male reproductive organs known as pollen sacs that produce pollen. Throughout the maturity, the male cone becomes elongated with
Macrozamia_miquelii
Diploid multicellular stage in the life cycle of a plant or alga
are very reduced in size, and are represented by the germinated pollen and the embryo sac. The sporophyte produces spores (hence the name) by meiosis, a
Sporophyte
Species of plant
sessile, basifixed anthers. The two truncate thecae each consist of two pollen sacs and open longitudinally by a slit. The head-like female inflorescences
Liquidambar_yunnanensis
Species of flowering plant
of 3–5 mm. The stamens are kept within the tube of the flower and the pollen sacs on the stamens are 0.5–0.6 mm in size. The staminode, or fuzzy tongue
Penstemon_ambiguus
Species of plant
edges are smooth. The stamens (pollen-producing structures) are shorter than the petals, and the anthers (pollen sacs) are reddish. The nectary glands
Rhodiola_pachyclados
Plant species in the veronica family
flower, but the longer pair my reach the mouth of the flower tube. The pollen sacs on the stamens are 1–1.4 mm in size with a raised area around the opening
Penstemon_secundiflorus
Order of flowering plants
one (Cannaceae, Marantaceae) or two (Zingiberaceae, Costaceae) anther pollen sacs. The infertile stamina are homologous with the fertile stamina in the
Zingiberales
Extinct genus of seed ferns
Dicroidium leaves. The pollen organ Pteruchus differs from other seed fern pollen organs in having numerous pendant pollen sacs from a blade-like head
Pteruchus
Genus of insect
bumblebees, it is modified to form a pollen basket, a bare shiny area surrounded by a fringe of hairs used to transport pollen, whereas in cuckoo bumblebees
Bumblebee
Species of conifer
rachis. The microsporophylls are triangular and keeled, bearing two pollen sacs each. The female seed cones are borne on short lateral branchlets. A
Retrophyllum_vitiense
Elongated mouth part
including nectar, plant sap, tree sap, dung and of adaptations to the use of pollen as complementary food in Heliconius butterflies. An extremely long proboscis
Proboscis
Order of arachnids
egg sacs, which maintain a fairly constant humidity level. In some species, the females die afterwards, but females of other species protect the sacs by
Spider
Genus of cycads
underside (abaxial side) a variety of pollen sacs. These open with slots, from which the pollen then escapes. The pollen grains are streamlined and have only
Dioon
Genus of conifers
glabrous peduncles. A pollen cone consists of many spirally arranged microsporophylls each with two pollen sacs producing bisaccate pollen. The female seed
Retrophyllum
Species of flowering plant
yellowish-white pollen sacs. The 6-angled ovary is short and squat, topped by three erect, brownish-black stigmas that reach to the top of the anther sacs. The fruit
Trillium_sessile
Genus of plants
shape is triangular to rhomboid. Each microsporophyll forms about 150 pollen sacs, which are attached in groups of 3-6 at the bottom. At maturity, the
Stangeria
Species of conifer
pollen cones become cylindrical at its full length and consist of two pollen sacs. Seed cones are axillary, solitary, and arranged in long peduncles, with
Nageia_wallichiana
Species of shrub
about 12 mm long, with filaments approximately 5 mm long. The lower pollen sacs are free, sterile, and irregularly shaped. The fruit consists of rounded
Salvia_albicaulis
Species of spider
and/or deter harmful florivores while benefiting from the plant's supply of pollen and nectar, which T. onustus spiders are able to use as food sources, especially
Thomisus_onustus
Species of conifer
1–5 mm in diameter, with 8 to 15 fertile scales, each scale has two pollen sacs on the abaxial surface. Female flowers occur in cones on short branches
Pherosphaera_hookeriana
Species of flowering plant
and S. maritima has corollas less than 5 mm (0.20 in) long, stalked pollen sacs, and is usually found in the Caribbean and elsewhere in the tropics.
Stemodia_durantifolia
Genus of flowering plants in the borage family
hairs to an anther cone. The pollen sacs open into a central channel, through which the style later emerges. Dusty pollen is released through a pore made
Halgania
Structure inside bird eggs and plant ovules
embryo sac inside a flowering plant ovule, the three cells at the chalazal end become the antipodal cells. In most flowering plants, the pollen tube enters
Chalaza
Genus of flowering plants
a cylindrical anther. The connective tissue between the anther's two pollen sacs extends outwards at its base to form spurs. The ovary has three "cells"
Roscoea
respectively, normal and aberrant pollen produced by the same plant with Lepidopteris ottonis foliage and Antevsia zeilleri pollen sacs, is contested by Zavialova
2024_in_paleobotany
nucellus, and the female gametophyte is sometimes called the embryo sac or embryonic sac. Two distinct processes are involved in producing the megagametophyte
Embryonic_sac
Female organs of a flower
It consists of one or more pistils, and is typically surrounded by the pollen-producing reproductive organs, the stamens, collectively called the androecium
Gynoecium
Process of formation of megaspore mother cell (MMC) is called megasporogenesis
megaspore, which arises from megasporogenesis, develops into the embryonic sac, in which the female gamete is housed. These megaspores then develop into
Megagametogenesis
Species of honey bee
of another nest. The diet of this honey bee species consists mostly of pollen and nectar, or honey. Moreover, Apis cerana is known for its highly social
Apis_cerana
Species of legume
to a plant whose pollen tube discharges ciliated antherozoids which swim ( just like a water snake) before entering the embryo sac. The branches of this
Ononis_natrix
Extinct species of flowering plant
the margins. The anthers each have two pollen sacs which contain both pollen grains and orbicule grains. The pollen grains each have three circular pores
Betula_leopoldae
Medical condition
conjunctivitis are due to pollen and occur in the hay fever season, grass pollens in early summer, and various other pollens and moulds may cause symptoms
Allergic_conjunctivitis
Clade of seed plants that produce flowers
transfer pollen between them. Homomorphic flowers may use a biochemical self-incompatibility to discriminate between self and non-self pollen grains. Dioecious
Flowering_plant
Biological reproductive mechanism component
self pollen germinates and reaches the ovules, but no fruit is set. LSI can be pre-zygotic (e.g. deterioration of the embryo sac prior to pollen tube
Self-incompatibility
POLLEN SAC
POLLEN SAC
Female
English
Variant spelling of English Helen, probably HELLEN means "torch."
Male
English
Variant spelling of English Colin, COLLIN means "whelp; young pup."
Surname or Lastname
English
English : variant spelling of Hollen.
Female
English
Variant spelling of English Colleen, COLLYN means "girl."
Female
English
Anglicized form of Irish Gaelic CailÃn, COLLEEN means "girl."
Girl/Female
Irish
From the Irish cailin meaning “girl†and used by the Irish in the USA and Australia as a way of connecting to their Irish roots.
Surname or Lastname
English
English : variant of Bullen.
Surname or Lastname
Dutch and German (also North German von Holten)
Dutch and German (also North German von Holten) : habitational name from places so called, from Low German holt ‘holt’, ‘copse’, ‘small wood’. There is one in the Dutch province of Overijssel and another near Oberhausen in the Rhineland.Danish : variant of Holt.Norwegian : habitational name from any of several farmsteads so named, either from the definite singular form of holt ‘holt’, ‘small wood’ (see Holt), or from holt ‘hill’, ‘stony slope’.English : variant spelling of Holton.
Surname or Lastname
English (chiefly Yorkshire)
English (chiefly Yorkshire) : topographic name from Middle English holin ‘holly tree’, or a habitational name from any of the minor places named with this word, as for example Hollin and Holling in Worcestershire, or Hollins in West Yorkshire.
Surname or Lastname
English (Northumbria)
English (Northumbria) : apparently a variant spelling of Hollen.
Female
English
Variant spelling of English Colleen, COLEEN means "girl."Â
Surname or Lastname
English
English : variant spelling of Collin, a pet form of Coll 1.
Surname or Lastname
English and Irish
English and Irish : apparently a variant spelling of Follin.
Surname or Lastname
Norwegian
Norwegian : habitational name from any of several farmsteads, so named from Old Norse pollr ‘small bay’, ‘pond’.English : possibly a respelling of Irish Polan, Polin, an Anglicized form of Gaelic Mac Póilin ‘son of Pólin’, from a pet form of Pól, Gaelic form of Paul.
Female
English
Variant spelling of English Dolly, DOLLEE means "gift of God."
Surname or Lastname
English
English : nickname for someone with golden hair, from Middle English gelden, golden (from Old English gylden).Irish : reduced Anglicized form of Gaelic Mag Ualghairg (see McGoldrick).
Surname or Lastname
English (chiefly Yorkshire)
English (chiefly Yorkshire) : topographic name from Middle English holin, holi(e) ‘holly tree’. Compare Hollen.
Female
English
Variant spelling of English Dolly, DOLLEY means "gift of God."
Male
English
Variant spelling of English Colton, COLTEN means "Cola's settlement."
Surname or Lastname
English
English : variant of Woolen.Norwegian : habitational name from any of numerous farmsteads named Vollen, from the definite singular form of voll ‘meadow’ (see Voll).
POLLEN SAC
POLLEN SAC
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POLLEN SAC
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