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MICROSPORE [6 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2023-02-27

English

Subject field(s)
  • Biotechnology
  • Embryology
  • Plant and Crop Production
CONT

... "microspore embryogenesis" [refers] to the in vitro culture of the immature male gametophyte... The haploid embryos... can be germinated and grown into mature plants, but these plants are sterile due to their inability to produce gametes with a balanced chromosome number after meiosis. Chromosome doubling, which occurs either spontaneously in culture or after the application of... agents such as colchicine, restores the ploidy level and fertility of the derived plant...

French

Domaine(s)
  • Biotechnologie
  • Embryologie
  • Cultures (Agriculture)

Spanish

Save record 1

Record 2 2007-11-13

English

Subject field(s)
  • Federal Government Bodies and Committees (Canadian)
  • Genetics
OBS

The Transgenic Plant Centre is a specialized unit within PBI established to provide expertise and facilities for the production and assessment of plants developed through collaborative projects. These facilities are leased on a cost-recovery basis for the assessment of transgenic plants, developed through microspore culture and plants produced through other biotechnologies.

French

Domaine(s)
  • Organismes et comités fédéraux (Gouvernement canadien)
  • Génétique
OBS

Le Centre des plantes transgéniques est une unité spécialisée de l'IBP qui a été créée pour fournir de l'expertise et des installations pour la production et l'évaluation de plantes développées dans le cadre de projets conjoints. Ces installations sont louées selon le principe de recouvrement des coûts pour l'évaluation de plantes transgéniques, de plantes obtenues par culture de microspores et de plantes produites par d'autres techniques.

Spanish

Save record 2

Record 3 2006-05-18

English

Subject field(s)
  • Morphology and General Physiology
  • Plant Biology
  • Biotechnology
  • Botany
DEF

An asexual spore which gives rise to a dwarf male plant.

CONT

... evidence from microspores show that deep weathering processes were active in the late Precambrian.

OBS

[Microspore is the] smaller of the two types of spore produced in heterosporous plants; [it] develops in the pollen sac into a male gametophyte.

French

Domaine(s)
  • Morphologie et physiologie générale
  • Biologie végétale
  • Biotechnologie
  • Botanique
DEF

Spore, produite par un microsporange, à l'origine d'un gamétophyte mâle.

CONT

Chaque microspore haploïde (i.e. à «n» chromosomes) amorce, au sein du sac pollinique (aussi désigné microsporange), un développement qui la transformera en un tissu à peu de cellules. Ce tissu va devenir un gamétophyte mâle [...]

CONT

Dans le cas des monoïques, le sporocyste va former une zoospore (ou androspore) qui va s'insérer dans la cellule se trouvant sous l'oosphère puis va former un mâle nain qui, lui, ira féconder l'oosphère.

Spanish

Campo(s) temático(s)
  • Morfología y fisiología general
  • Biología vegetal
  • Biotecnología
  • Botánica
Save record 3

Record 4 2001-01-10

English

Subject field(s)
  • Paleontology
  • Botany
DEF

The larger of two cells derived from a microspore and from which rises an antheridium, as in Lycopodiales.

French

Domaine(s)
  • Paléontologie
  • Botanique
OBS

La plus petite des cellules se formant dans le grain de pollen des Gymnospermes, représentant une cellule mère d'anthéridie et qui donnera, par division, une cellule génératrice [...] et une cellule stérile [...]

Spanish

Save record 4

Record 5 1991-07-22

English

Subject field(s)
  • Genetics
CONT

Gametoclonal variation is recovered by regenerating plants from cultured microspore or pollen or pollen cells still contained within the anther... Thiâs genetic variation is the result of both recombination occurring during miosis and tissue culture induced mutation,...

French

Domaine(s)
  • Génétique
CONT

La variation gamétoclonale est engendrée par un cycle ou plus d'androgénèse in vitro (gamètes) et a été observée chez de nombreuses espèces telles que le tabac, le riz, le blé, l'orge. R. de Paepe (CNRS, Gif-sur-Yvette) est la première à avoir analysé les doublés de Nicotiana sylvestris.

Spanish

Save record 5

Record 6 1976-06-19

English

Subject field(s)
  • Botany
OBS

microspore : One of the spores of a heterosporous plant(as the pollen grain of a seed plant) that gives rise to male gametophytes and that is generally smaller than the megaspore.

French

Domaine(s)
  • Botanique
OBS

Les plantes à fleur n'ont gardé que les microspores, appelés alors grains de pollen.

Spanish

Save record 6

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