问:我们这里有一棵李子树,春季开了花,初秋又再度开花,并结出了一些很小的果子,这是什么道理? (蓬安县凤石乡云山) 答:果实是由花发育而成,而花是由头年或当年孕育的花芽(或混合芽)发育而成。要具备下面几个条件才能发育成花芽。①芽的生长点细胞必须处在缓慢分裂状态;②要有一定的营养物质和激素(如细胞分裂素)的积累;③要有适当的外界环境条件。 Q: We have a plum tree here, blooming in the spring, the early autumn flowering again, and the conclusion of some small fruit, what is the truth? (Pengshan County Pengshan Township Yunshan) A: The fruit is from the flower development And flowers, and flowers from the first year or when the flower buds (or mixed buds) developed from. To have the following conditions to develop into flower buds. ① bud growth point cells must be in a state of slow division; ② have a certain accumulation of nutrients and hormones (such as cytokinin); ③ have appropriate external environmental conditions.