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Journal of Agronomy
Year: 2007  |  Volume: 6  |  Issue: 2  |  Page No.: 366 - 369

Effect of Salinity Stress on Structure and Ultrastructure of Shoot Apical Meristem of Canola (Brassica napus cv. Symbol)

Homa Mahmoodzadeh, Ahmad Majd and Mehrdad Lahouti    

Abstract: In the present research structure and ultrastructure of shoot apical meristem of canola (Brassica napus cv. Symbol) under salinity conditions were investigated. The experiments were conducted in five groups (0, 3, 6, 9, 12 dS m-1) under greenhouse conditions. Sampling of apical meristem and TEM tissue preparation procedure were carried out. Semithin and ultrathin sections were prepared and viewed in light and electron microscopy, respectively. The results included reduction of meristem size, disorders in meristem structure. Also formation of autophagic vacuoles was observed that is probably one of the plant responses to salt stress for more water storage in these vacuoles and decreasing of cell water requirements.

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