Citrus limon

Taxonomy

Family

Rutaceae

Genus

Citrus

Species

limon

Distribution

Mediterranean bush, Africa, Macaronesia, Asia, Australia and America. In Italy cultivated (0-800 m)

Utility

Food, drinks, aroma, vitamin source, to marinate and medical use. Ornamental plant, honey production and biodiversity

Flowering time

I-XII

PollenPollenDefinition: The pollen grain is the Gymnosperms and Angiosperms male germ element. Its function relates to the sexual fertilization....
characteristics

Group

MonadMonadDefinition: solitary pollen grain derived from a tetrad or polyad, which normally break down into individual pollen grains....

Simmetry

Radial

PolarityPolarityDefinition: pollen characteristics to possess two endowed poles of equal or different features....

IsopolarIsopolarDefinition: pollen grain with the proximal pole like the distal one....

ExineExineDefinition: external layer of the sporoderm consisting of ectexine plus endexine....
sculpturing

ReticulateReticulateDefinition: sporoderm sculture with reticulum-shaped elements and lumina greater than 1 um. This elements constitute the tectum...
- HeterobrochateHeterobrochateDefinition: sculture with unequal brochi of reticulum....

ApertureApertureDefinition: opening to allow pollen tube germination. Zone of pollen grain surface in which the exine thins or completely lacks....

Tetra - Pentacolporate

Polar viewPolar viewDefinition: view from which it is possible to observe the shape, sculpture, cytoplasm and apertures of a pollen grain in polar position....

QuadrangularQuadrangularDefinition: type of pollen shape in polar view....
- PentagonalPentagonalDefinition: distinctive shape of a not germinated pollen in polar view....

Equatorial view

SuboblateSuboblateDefinition: pollen with the P/E ratio between 0.75 to 0.88 and slightly flattened at the poles....
- SubcircularSubcircularDefinition: kind of pollen shape in polar view....

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