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回答落叶的过程。

问答题
2021-07-21 06:54
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正确答案

1叶肉细胞有用成分分解,维管束运回植物体重新利用利用
2叶绿体解体,叶黄素出现,部分出现花青素
3叶柄基部产生离层,形成离区,果胶层分解,只剩下维管束连接
4叶片脱落后,剩下叶痕,导管,筛管被树胶填满


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