一、设计依据和构想关于生长素的生理作用,教材首先结合前面讲过的向光性内容,分析了植物显示出向光性的原因,并由此得出生长素能促进植物生长的结论。然后,结合一些例子,讲述了生长素对植物生长的两重性。前后两部分内容似乎产生了矛盾。利用这一矛盾激起学生的求知欲和好奇心,使学生对所要探索的内容产生浓厚的兴趣,引导学生主动进行探究性学习。通 First, the design basis and conception On the physiological role of auxin, textbook first with the previously mentioned to the light content, analysis of plants showed the nature of the light, and draw conclusions from auxin can promote plant growth. Then, combined with some examples, it tells the duality of auxin on plant growth. There seems to be a contradiction between the two parts. The use of this contradiction aroused students curiosity and curiosity, so that students have a deep interest in the content to explore, and guide students to take the initiative to explore learning. through