Background:The upmost three leaves are generally regarded as the foremost source of photosynthetic products and are asso......

Leaf shape is highly variable within and among plant species,ranging from slender to oval shaped.This is largely determi......

作为自然选择的对象,叶片大小和形状能够发挥适应性作用,并且随叶龄而改变.在雌雄异株的植物中,叶片大小和形状因性别而不同,在大......