一、叶位和叶的构造 稻、麦的叶身形态,实际上从第一叶到剑叶随不同叶位而变化,员不象某些双子叶植物那样表现出显著的异形叶,但仔细观察,不同叶位的叶片构造不同。 叶身长度与叶位一同增加,在剑叶的前几叶为最长,其后,直到剑叶又减短。叶身长度由细胞平均长度乘以细胞数所构成。就小麦叶身的表皮细胞来看,细胞数随叶位而增加,细胞长度在第五叶位和第六叶位为长,由此的上位叶和下位叶均短。可以认为,低位叶因叶 First, the leaf position and leaf structure Rice, wheat leaf shape, in fact, from the first leaf to the flag leaf with different leaf position changes, unlike some dicotyledonous plants did not show significant shaped leaves, but carefully Observe that different leaves have different leaf structures. The length of the leaf body increases with the leaf position, the longest in the first few leaves of the flag leaf, and then shortened until the flag leaf. Leaf body length by the average cell length multiplied by the number of cells formed. In terms of the epidermal cells of the wheat leaf body, the number of cells increases with the leaf position, and the length of the cells is long in the fifth leaf position and the sixth leaf position, whereby the upper lobe and the lower lobe are short. Can think of low leaves because of leaves