phloem sheath的意思|示意

Heat tolerant cultivar is higher than heat sensitive cultivar in leaf phloem area ratio and leaf sheath duct area ratio, while lower in leaf duct area ratio and leaf sheath phloem area ratio.

耐热品种的叶片韧皮部面积比例、叶鞘导管面积比例大于不耐热品种，叶片导管面积比例、叶鞘韧皮部面积比例则小于不耐热品种。

The weight of a single sheath is correlated with the number of large vascular bundle and the area of vascular bundles, is correlated significantly with the area of phloem for vascular bundles.

单茎鞘重与大维管数、维管总面积相关显著，与韧皮部总面积相关极显著。

The vascular bundle consists of vascular bundle sheath, xylem, phloem and big parenchymatous cells.

维管束由维管束鞘、木质部、韧皮部和大型薄壁细胞组成。