metaxylem


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Related to metaxylem: protoxylem

metaxylem

(ˌmɛtəˈzaɪlɛm)
n
(Botany) xylem tissue that consists of rigid thick-walled cells and occurs in parts of the plant that have finished growing. Compare protoxylem
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15g) clear sequences from protoxylem to metaxylem can be seen.
As shown in Figure 2, vascular bundles for both of internodes and nodes consisted of two metaxylem vessels and one phloem.
A greater arrangement of protoxylem is related to the anatomy of the vascular cylinder (VC), the bundles of metaxylem and phloem, smaller, did not occupy as much space as other cultivars with VC of similar caliber (Figure 1h).
Frank green possessed incremented root metaxylem area under polluted conditions.
damascena under treated wastewater while large metaxylem area of R.
SEM micrographs showed the metaxylem pit membranes with numerous holes of various sizes.
(4,11) In particular, VND6 and VND7 are specifically expressed in differentiating tracheary elements of the metaxylem and protoxylem, respectively.
This behavior is due to the radial distribution of the vascular bundles, as well as to the silicon concentration, which has been associated with a nonuniform distribution through the wall of the microfibers and the metaxylem and phloem ducts.
With respect to cylinder vascular the xylem tissue were not clear (figure, 4 A and D), but it contained many lacunae beside of endodermis layer, described by [4] as a Metaxylem. The centeral cylinder was occupied by a large size lacunae it was Protoxylem according to previous source, but that the [10] considered it a central intercellular passage, whilst [27] pointed out that stem's section which studied on the area between the node did not show tissue suggests that it xylem.
Tracheary element secondary wall patterns and the definition of protoxylem and metaxylem. International Association of Wood Anatomists Bulletin 1977/1: 7-9.
Thus, the present study aimed to evaluate the effect of foliar sprays with thiamethoxam on the re-sprouting of sugarcane in terms of anatomical features of roots: root cortex, central cylinder diameter and number of elements of metaxylem vessels of the RB 83 5486 variety.