metaxylem


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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.
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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.
The number of metaxylem vessel elements showed significant interaction between weeks of collection and dosages of thiamethoxam (Table 3).
Vascular tissue--Four shapes of major vascular bundle are observed: ovoid (63), rhomboid (64), elliptical (65), round in outline (66); one or more vessels of metaxylem are located either in the central part or in the lower part of the major vascular bundle (67, 68); location of phloem, only in the lower part of xylem (69), or surrounding it partially, either U-shaped (70) or half-moon shaped (71); fibers in major vascular bundle are either mostly located at the bottom (72), or located at the two extremities with a few laterally (73), or exclusively located at the extremities (74).
metaxylem and protoxylem, sclerenchyma sheath, parenchyma and fibers) were bigger for the disturbed site stem samples than for those from the undisturbed site (Tables 2 and 3).
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.
The anatomical study of the metaxylem cells of the sesame seedlings was performed using seeds germinated in distilled water under ideal conditions.
Epidermis thickness Epidermis cell area Sclerenchyma thickness Sclerenchyma area Sclerenchyma bundle area Cortical region thickness Cortical cell area Endodermis thickness Endodermis cell area Phloem area Pith area Metaxylem area and Vascular region thickness were measured (Table I).