metaxylem


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to metaxylem: protoxylem

metaxylem

those parts of the xylem tissue of plant roots and stems that are produced last by the cambium, tending to have larger cells than the PROTOXYLEM, the first-formed elements.
Mentioned in ?
References in periodicals archive ?
e Avascular tracheid from the terminal latewood, from a radial section, f Metaxylem vessel with an associated strand of axial parenchyma (left), g Oreopanax steinbachianus Harms, cult.
In present study, significant effects of polluted environment were recorded in Hibiscus plants as far as stem metaxylem area was concerned.
Metaxylem area (um2): There was significant variation in metaxylem area in Rosa species and R.
(2005) Transcriptional switches for protoxylem and metaxylem vessel formation.
Changes in the growth and development of seedling roots in response to allelochemicals can be explained by a reduction in the number of mitotic cells, inhibition of meristematic cell proliferation, inhibition of the cell cycle, disintegration of the root cap, increased diameter of the vascular cylinder and earlier lignification of the metaxylem (SANTOS et al., 2008; SOLTYS et al., 2011).
The number of metaxylem vessel elements showed significant interaction between weeks of collection and dosages of thiamethoxam (Table 3).
epidermis cell area, sclerenchyma area, sclerenchyma bundle area cortical cell area, endodermis area, phloem area, pith area and metaxylem area were measured with the help of calibrated ocular micromerter under a compound microscope to compare the different root structures of all 9 cultivars, named as Akhrot, Begum Jhangi, Champa Kali, Chohara, Daanda, Daglut Noor, Dakki, Halawi-1 and Halawi-2 (Table I).
Inner wall of epidermic cells are thin; parenchyma composed of polyhedral cells; collateral bundles with a set of sclerenchyma fibers are located at the periphery, each collateral bundle includes two lateral strands of phloem, a central bundle composed of small strands of phloem surrounded with phloematic fibers, a large vessel of metaxylem, several small vessels of protoxylem and xylematic parenchyma.
This plugging was observed as early as the third day of recovery in metaxylem vessels (Fig.
Jaramillo GC, White JW, de la Cruz G (1992) The effect of soil compaction on differentiation of late metaxylem in common bean (Phaseolus vulgaris L.).
Some properties of the walls of metaxylem vessels of maize roots, including tests of the wettability of their luminal wall surfaces.