, external, middle, and inner seed coat.The epidermis of external seed coat is cutinized, and the middle seed coat is phellem, and the inner seed coat is lignified and hard.

 
  • 结果表明,青钱柳种子种皮有3层,外种皮表面角质化,中种皮木栓质,内种皮木质而坚硬,这在一定程度上阻碍了胚与外界的水汽交换,影响种子的吸胀和萌发。
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