pollen$62115$ - translation to ελληνικό
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pollen$62115$ - translation to ελληνικό

A TUBULAR CELL PROJECTION THAT IS PART OF A POLLEN TUBE CELL AND EXTENDS FROM A POLLEN GRAIN.
Pollen tubes; Pollen-tube
  • 223x223px
  • angiosperm ovule
  • Mechanism to prevent self pollination and allowing compatible pollen to grow a pollen tube for fertilization to take place
  • SEM image of pollen tubes growing from lily pollen grains.
  • Cross section of ovule in gymnosperms and angiosperms
  • Gymnoperms in perspective on the phylogeny
  • Bee pollinating a sunflower. Pollen is transferred from anther of one plant to stigma of another as bee collects nectar
  • Pollen on stigma

pollen      
n. γύρις, γύρη
hay fever         
  • Illustration depicting inflammation associated with allergic rhinitis
  • [[Patch test]]
HUMAN DISEASE
Hay fever; Hayfever; Pollinosis; Hay-fever; Cedar Fever; Pollen allergy; Pollenosis; Cedar fever; Hay fever medication; Birkenpollenallergie; Environmental allergies; Environmental allergy; Allergic conjunctivorhinitis; Hay Fever; Allergic to grass; Grass allergy; Pollen sensitization
είδος καταρροής

Ορισμός

pollen
(pollens)
Pollen is a fine powder produced by flowers. It fertilizes other flowers of the same species so that they produce seeds.
N-MASS

Βικιπαίδεια

Pollen tube

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 the plant life cycle. The pollen tube acts as a conduit to transport the male gamete cells from the pollen grain—either from the stigma (in flowering plants) to the ovules at the base of the pistil or directly through ovule tissue in some gymnosperms. In maize, this single cell can grow longer than 12 inches (30 cm) to traverse the length of the pistil.

Pollen tubes were first discovered by Giovanni Battista Amici in the 19th century.

They are used as a model for understanding plant cell behavior. Research is ongoing to comprehend how the pollen tube responds to extracellular guidance signals to achieve fertilization.