Phloéniques

Phloéniques is a term used in botany to refer to things pertaining to the phloem, the vascular tissue in vascular plants responsible for translocating sugars and other organic compounds from photosynthetic tissues to non-photosynthetic parts. The form phloénique (plural phloéniques) is the French adjective derived from phloème. In English-language botany, the corresponding adjective would be phloem-related or phloemic, but phloéniques appears in French texts.

In anatomy, phloéniques include cells and tissues associated with phloem: sieve elements (sieve tubes and sieve plates), companion cells, phloem parenchyma, and phloem fibers. The phloem conducts photosynthates from sources such as mature leaves to sinks like roots, fruits, or developing tissues. Transport is typically described by the pressure-flow hypothesis, driven by osmotic gradients that generate turgor pressure in loading zones and unloading zones, allowing long-distance movement through sieve tubes.

Phloéniques processes encompass loading of sugars into sieve tubes in source tissues, translocation through the phloem, and unloading at sink tissues. They are regulated by transport proteins, plasmodesmata, and signaling molecules, including hormones and RNAs that coordinate growth and defense responses.

As a linguistic category, phloéniques is used to label features and phenomena tied to phloem biology, distinguishing them from xyléniques (xylem-related) aspects. It is not a taxonomic group, but a descriptive term found in botanical literature.