| 1. | The xylem of ferns and conifers contains only tracheids .
蕨类植物和针叶树的木质部仅含有管胞。
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| 2. | Sapwood contains xylem vessels, but not as strong as heartwood .
边材含有木质导管，但不如中心木质那样坚硬。
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| 3. | Secondary xylem consists of pitted vessels, parenchyma fibers and rays .
次生木质部由孔纹导管、薄壁组织及射线所组成。
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| 4. | A system confined to the transport of mineral elements is known as the xylem .
专门用来运输矿物元素的系统称为木质部。
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| 5. | The stele includes all primary tissues derived from the procambium consists of pericycle，phloem and xylem .
中柱包括从原形成层衍生而来的全部初生组织，由中柱鞘、韧质部和木质部组成。
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| 6. | In older stems, only the most recent rings of xylem participate in the transport of materials. these make up the sapwood .
在老茎中，仅最新的木质部环参与物质的运输。这些木质部环组成边材。
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| 7. | Effects of xylem cavitation and embolism on plants
木质部空穴和栓塞化对植物的影响
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| 8. | Study of vessel elements of secondary xylem in aquilaria agallocha
次生木质部导管分子研究
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| 9. | Observation of vessel elements of secondary xylem in mangifera indica
芒果次生木质部导管分子的观察
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| 10. | Studies on the vessel elements of secondary xylem in manilkara zapota
人心果次生木质部导管分子的观察研究
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