这个词是什么意思？
Plant tissue that carries nutrients, especially sucrose, by turgor pressure. Movement is bidirectional, in contrast to XYLEM where it is only upward. Phloem originates and grows outwards from meristematic cells (MERISTEM) in the vascular cambium. P-proteins, a type of LECTINS, are characteristically found in phloem.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D052585 · MeSH 2026。
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