Studies on Developmental Anatomy of Floral Nectaries of Male-Sterile-Homomaintainer Line in "Hot Pepper 95-1"

Studies on floral nectaries and their development of male-sterile line and homomaintainer line in’Hot pepper 95-1’have been done by scanning electron microscope and the paraffin slice technique.The results show that positions of floral nectary,morphology and development of male sterile-line and homomaintainer line are similar.The floral nectary of ’Hot pepper 95-1’is at the base of ovary,and belongs to ovarial nectary.The nectary is composed of nectariferous tissue and secretory epidermis,which is covered by cuticle.There is no stoma observed on it.The nectariferous tissue is of many layers of cells.At early stage of the flower bud,the division growth and differentiation of the cells of ovary outer epidermis and its adjacent inner side result in the formation of floral nectary.At the stage of bud enlargement,the cytoplasm of secretory epidermis and nectariferous tissue is dense and initially accumulates polysaccharide and protein.At the revealing corolla stage of flower,cytoplasm of nectariferous tissue and secretory epidermis is thin,and accumulates polysaccharide and protein continuously.At early stage of anthesis,cytoplasm is dense,and a large number of polysaccharide and protein accumulate.At the full-bloom stage,the amount of vacuole increase and polysaccharide and protein decrease.At the withering stage,nectariferous tissue form central vacuole and the polysaccharide accumulates again.