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1．胚芽鞘感光部位、光对胚芽鞘生长的影响上图是一组燕麦胚芽鞘实验,每项实验处理方法不同,试分析在不同情况下胚芽鞘的生长状况。图中的⑥将如何生长呢?明确了胚芽鞘感光部位在尖端,则易答对“直立生长”。上图中的②虽然没有照光,但仍可以直立生长。其实单侧光只影响生长素的运输和分布,不影响生长。关于生长素影响生长的实验设计,也可以从上图中得到借鉴。
1. The coleoptile photoreceptor site and the effect of light on the growth of coleoptile The above picture shows a group of oat coleoptile experiments. The treatment of each experiment is different, and the growth of coleoptiles under different conditions was analyzed. In the picture, how will the 6 grow? It is clear that the coleoptile photoreceptor is at the tip, so it is easy to answer “upright growth”. Although the 2 in the figure above does not shine, it can still grow upright. In fact, unilateral light only affects the transport and distribution of auxin and does not affect growth. The experimental design on the effect of auxin on growth can also be learned from the above figure.