Malus domestica

Taxonomy

Family

Rosaceae

Genus

Malus

Species

domestica

Distribution

Europe, Asia, America, Australia and New Zealand. In Italy hybrid commonly cultivates (0-1500 m).

Utility

Food, drinks, as ornament and medicinal purposes. Honey production and biodiversity.

Flowering time

IV-V

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

ScabrateScabrateDefinition: ref. sculture. Sporoderm with elements less than 1 um high....
- RugulateRugulateDefinition: ref. sculture. Sporoderm with short parallel elements (ridges) alternating with (empty spaces)....

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

TricolporateTricolporateDefinition: ref. aperture. Pollen grain with three apertures formed by colpi and pori....

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

SubtriangularSubtriangularDefinition: type of pollen shape in polar view....
- TriangularTriangularDefinition: distinctive pollen shape in polar view....

Equatorial view

SuboblateSuboblateDefinition: pollen with the P/E ratio between 0.75 to 0.88 and slightly flattened at the poles....

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