phloem


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phloem

a transport tissue characterized by the presence of sieve tubes, companion cells and phloem parenchyma cells, found in the VASCULAR BUNDLES of higher plants. Phloem functions in the transport of dissolved organic substances (e.g. sucrose) by TRANSLOCATION.
References in periodicals archive ?
The phloem imports mostly water and sugar into the berry, but unlike the xylem, the phloem can transport only one direction: into the berry.
Morphological incompatibility is associated with discontinuity in the xylem and phloem vessels, which hinders the flow of sap to the cultivars well as increasing carbohydrate accumulation in the upper parts of the plant (ZARROUK et al.
In flax stem, an important process in the development of phloem fiber cells is the thickening of fiber cell wall (Gorshkova et al.
In this portion, a pith begins to appear, and the primary xylem is spread into a continuous tangential ring and primary phloem strands surrounding the pith (Figure 2B).
citri were originally characterized and correlated as non-probing (NP), pathway (C), xylem ingestion (G), phloem contact (D), phloem salivation (E1), and phloem ingestion (E2) (Bonani et al.
Two k-type thermocouples wired to a data logger were inserted to the center of the logs and 1 cm into the phloem.
But the book's lifeblood, or xylem and phloem, if you will, are Jahren's stories from her early days as a scientist.
In this process, the proteins of the leaves are hydrolyzed, and the resulting free amino acids are transported via the phloem to storage tissues, where they are converted into reserve proteins.
Transmitted by small insects called beet leafhoppers, the curly top virus courses through the phloem of susceptible beet plants, wreaking cellular havoc that can manifest as yellow, inwardly curled leaves; stunted growth; and other telltale symptoms.
Interxylary phloem also occurs conspicuously in Brassicaceae (this paper) and Salvadoraceae (Carlquist, 2002).