慈姑雌花蜜腺的解剖学观察

应用石蜡切片和组织化学方法,对慈姑雌花蜜腺的形态结构进行了研究.结果表明,慈姑雌花蜜腺不很发达,无明显的成形蜜腺,仅存在腺细胞及分泌道,腺细胞位于最外(最下)轮雌蕊基部的花托表面,由腺细胞构成腺表皮,属于花托蜜腺.它仅有一层分泌表皮(腺表皮)而未分化出特殊的产蜜组织,又属于非结构蜜腺.腺表皮由一层近方形的大型细胞组成,细胞排列紧密,细胞质浓厚,细胞核大,内含丰富多糖类物质.根据其蜜腺的位置及结构,可以推测其蜜腺可能是由花的雄蕊退化而成的.

Anatomical Study on Female-flower Nectaries of Sagittaria triforia

The nectary morphology of Sagittaria triforia female flowers were studied using paraffin section and histochemistry methods.The results showed that the nectaries were not upgrowth,no obvious shaped nectaries and they were just gland cells and secretory cavities.Nectary cells were at the receptacle surface which was at the bases of the furthest outside gynoecia.They were constituted of gland cells,which named gland epidermises and belonged to receptacle nectaries.They were only secrete epidermises and no special producing-honey tissues,being non-structure nectaries.The gland epidermis was composed of one large-scale cell layer,which were near quadrate,tightly arranged.Its cytoplasm were denseness and the karyons were big.It was speculated that the nectaries of Sagittaria triforia were degenerated from androeciums.