sclerenchyma造句
1. Lignified tissues include SCLERENCHYMA and XYLEM.
2. Question 16. Collenchyma and sclerenchyma are plant support tissues.
3. Plants may differentiate collenchyma and sclerenchyma as supporting tissues.
4. Sclereid Any SCLERENCHYMA cell except the long fibers.
5. Q 4: Plants may differentiate collenchyma and sclerenchyma as supporting tissues.
6. Sclerenchyma cells are a more common type of supporting cell.
7. Reductions of cell wall thickness and birefringence were observed in both fiber (sclerenchyma) and parenchymal cells, together with blurring of the wall's layered structures.
8. Fiber A form of SCLERENCHYMA cell that is often found associated with vascular tissue.
9. Sclerenchyma is often found associated with vascular tissue and exists as two distinct types of cell: the long FIBER and the shorter SCLEREID.
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10. Having the epidermis, cortex, starch sheath, perivascular sclerenchyma, six vascular bundles, pith and pith ray, the stem is similar to the root in their structure.
11. The leaf veins were dense, bundle sheaths had two layers, the outer layers were bigger parenchyma and the inner ones were smaller sclerenchyma.
12. Ferns do not show secondary thickening, but in large ferns such as tree fens bands of sclerenchyma and the overlapping bases of the fronds help to support the plant.
13. The degree of lignification varies from slight in protoxylem to heavy in sclerenchyma and some xylem vessels, but values of 25-30% lignin and 50% cellulose are average.
14. The sclereid was one representative of short sclereid of sclerenchyma.
15. Their internal structures consist of air passages, vascular bundles of various size, ground tissues and sclerenchyma.
16. Plant cell walls can be strengthened for extra support by addition of lignin (as in xylem and sclerenchyma)or extra cellulose(as in collenchyma).
17. Collenchyma is the first strengthening tissue to be formed in young plants and is able to expand as the yound tissues continue development. Compare sclerenchyma.