Influence of Salinity at Early Stage of Flowering on the Development of Male Gametophyte in Canola (Brassica napus L.) cv. Symbol

摘要

Effects of salt stress on developmental stages of male gametophyte were investigated, using both light and electron microscopy through the popular cyto-histological methods. The findings were then compared with those obtained from the unstressed plants. It was found out that salt stress could cause significant changes on the general growth of plants as well as a reduction of the number of pollen grains in anthers at the beginning of flowering stage. In spite of the normal appearance of the florets, the growth of anthers was abnormal, appearing to be shriveled, colorless and small. The other effects observed during various stages of development are as follow: pre-time destruction of the anther wall, degeneration and abnormal forms of pollen grains. As a result, such reduction of the number of pollens and their abnormality of the form and structure could ultimately lead to decrease of crops yield.