The process whose specific outcome is the progression of the pollen grain over time, from its formation to the mature structure. The process begins with the meiosis of the microsporocyte to form four haploid microspores. The nucleus of each microspore then divides by mitosis to form a two-celled organism, the pollen grain, that contains a tube cell as well as a smaller generative cell. The pollen grain is surrounded by an elaborate cell wall. In some species, the generative cell immediately divides again to give a pair of sperm cells. In most flowering plants, however this division takes place later, in the tube that develops when a pollen grain germinates.

The chemical reactions and pathways resulting in the formation of cutin, a waxy substance, which combined with cellulose forms a substance nearly impervious to water and constituting the cuticle in plants.

The chemical reactions and pathways resulting in the formation of suberin monomers and suberin polyesters. Suberin monomers are derived from fatty acids and trans-cinnamic acids. The monomers are then cross-linked with glycerols.

The formation of the pollen exine. The reticulate pollen wall pattern consists of two layers, exine and intine.

The chemical reactions and pathways involving ferulate, (2E)-3-(4-hydroxy-3-methoxyphenyl)prop-2-enoate.

The chemical reactions and pathways resulting in the formation of pectin, a polymer containing a backbone of alpha-1,4-linked D-galacturonic acid residues, as part of the organization and biogenesis of the cell wall.

The chemical reactions and pathways resulting in the formation of spermidine hydroxycinnamate conjugates.

The chemical reactions and pathways resulting in the formation of ester derivatives of alkyl caffeate.

The chemical reactions and pathways resulting in the formation of lignins, a class of polymers formed by the dehydrogenetive radical polymerization of various phenylpropanoid monomers.

The chemical reactions and pathways resulting in the formation of alkaloids, nitrogen-containing natural products which are not otherwise classified as nonprotein amino acids, amines, peptides, amines, cyanogenic glycosides, glucosinolates, cofactors, phytohormones, or primary metabolite (such as purine or pyrimidine bases).

Any process that activates or increases the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of flavonoids.

A homeostatic process that maintains an endogenous steady-state concentration of primary auxin, or constant level of auxin in a biological system, by a number of biochemical processes including transport, biosynthesis, catabolism and conjugation.

The chemical reactions and pathways resulting in the formation of volatile molecules emitted from green plants, such as hexenal, hexenol and hexenyl acetate, from linoleic acid or linolenic acid.

The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.

All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.

A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.