Lignified tissues include SCLERENCHYMA and XYLEM.
木质素组织包括厚壁组织和木质部。
Sclereid Any SCLERENCHYMA cell except the long fibers.
为厚壁组织中除纤维外的所有细胞种类。
Question 16. Collenchyma and sclerenchyma are plant support tissues.
厚角组织及厚壁组织为植物的支持组织。
Their internal structures consist of air passages, vascular bundles of various size, ground tissues and sclerenchyma.
它们的内部结构是由气道、不同大小的维管束、基本组织以及厚壁组织组成。
Sclerenchyma is often found associated with vascular tissue and exists as two distinct types of cell: the long FIBER and the shorter SCLEREID.
厚壁组织由两种形式截然不同的细胞组成：较长的纤维和较短的石细胞。
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.
该植物茎与根茎的构造相似，均有表皮、皮层、淀粉鞘、周维纤维、六束维管束、髓及髓射线。
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.
不同部位的木质化的程度不同，原生木质部中只有轻微的加厚，而在厚壁组织和一些木质部导管中则进一步加厚，平均含25%-30%的木质素和50%的纤维素。
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.
厚壁细胞和薄壁细胞的细胞壁厚度减小，双折射也降低，并且细胞壁的分层现象变得不明显。
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.
厚壁细胞和薄壁细胞的细胞壁厚度减小，双折射也降低，并且细胞壁的分层现象变得不明显。
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