Cytological Observasion on Microsporogenesis of the Male Sterile of Tomato

In this experiment,the abortion mechanism of tomato male sterility microspore was studied from the cytology.The material was tomato male sterility JL-2 and the control material was QIANXI,through the paraffin section,the results were observed by the ZEISS microscope: the fertility tomato microspore growth process occurred in the microspore mother cell,the tetrads,the uninucleate microspor and adult mierodiode.The microspore growth depended on the nutrition of tapetal cells self-disintegrating unceasingly.What the differention was,the sterile tomato microspore abortion occurred at the stage of microspore mother cell,etrads and uninucleate microspor.Mainly,because the tapetal cell growth is unusual,tapetal cell vacuolization ahead of schedule in the microspore growth period,connot provide the nutrient to microspore;In the tetrad time and the uninucleate microspore time,the tapetal cells vacuolization,the radial direction expanded higJLy,the microspore metrocyte was extruded,the microspore metrocyte cont grow normally resulted in the abortion.