protoxylem

protoxylem

1. 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。

2. It consists of the protoxylem (formed first) and metaxylem.

包括原生木质部（最早形成的）和后生木质部。

3. protoxylem vessel

原生木质部导管

4. protoxylem strand

原生木质部束

5. protoxylem lacuna

原生木质部腔隙

6. Protoxylem The PRIMARY XYLEM elements that are formed from the procambium first.

原生木质部：初生木质部的成分，最早由原形成层形成。

7. protoxylem pole

原生韧皮部

8. It is found in protoxylem and first metaxylem tracheids and vessels.

可在原生木质部和初始后生木质部的管胞和导管中见到。

9. The part of the primary xylem that differentiates after the protoxylem and is characterized by broader vessels and tracheids.

后生木质部初生木质部中不同于原生木质部的一部分，以更宽的导管和管胞为特征

10. the part of the primary xylem that differentiates after the protoxylem and is characterized by broader vessels and tracheids

后生木质部，初生木质部中不同于原生木质部的一部分，以更宽的导管和管胞为特征

11. In seed plants the protoxylem occurs at the innermost edge of the vascular bundles in stems, but external to the later-formed xylem in roots.

在种子植物中，原生木质部发生在茎的维管束的最内方，但在根中，位于后生木质部的外方。

12. Annular thickening Rings of thickening laid down on the inner wall of protoxylem vessels and tracheids.

环状加厚：原生木质部导管和管胞的内层环状??厚。

13. The results indicated that the protoxylem of Cajanmus cajan in the main root was mostly tetrarched,less pentarched and hexad.

结果表明:木豆主根的初生木质部多为4原型,少数3原型;

14. The results indicated that the protoxylem of Cajanmus cajan in the main root was mostly tetrarched, less pentarched and hexad.

结果表明：木豆主根的初生木质部多为4原型，少数3原型；