Abstract:
Pollination is a key process in life cycle of plants.The plants of Solanaceaehave solid styles and wet stigmas.Successful pollination begins with pollen adhering to the surface of the mature stigma,followed by hydration and germination.The pollen tube passes through the stigma and style,targeting to the embryo sac inside the ovule,and the sperm is released to complete double fertilization with the help of the synergid.During this process,pollen coat components interact with the secretion of the pistil,which activates a series physiological and biochemical reactions.At the same time,secretion among the stigma,style,ovule and the synergid plays a key role in the normal growth of pollen tubes,but they could also result in incompatibility in Nicotiana,including self incompatibility and cross incompatibility.In this review,the substances and mechanisms involved in the interaction between pollen and pistil after pollination in Nicotianawere summarized.These substances mainly include proteins,polysaccharides,lipids,hormones,enzymes and flavonoids.