结果表明，叶维管束内的大型薄壁细胞为芦荟素的主要贮存结构。

Results show that the large parenchymatous cells of vascular bundles are the mainly storage site of aloin.

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据此，芦荟叶维管束内的大型薄壁细胞的来源与韧皮部相同，属于特化的韧皮部薄壁组织细胞。

So the aloin cells were special phloem parenchyma cells because they Shared the same origin with the other phloem cells.

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根据萼片内的许多维管束结构，通常认为其由叶发育而成。

Sepals contain several vascular bundles, and are thought to be derived from leaves.

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