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慈菇下胚轴毛的形态发育研究
施国新; 徐祥生;   
南京师范大学生物系
摘要:
慈菇种子萌发前,下胚轴基部的表皮细胞分化成生毛细胞。当下胚轴穿出种皮约1—2毫米时,生毛细胞的外壁向外突出,形成下胚轴毛。开始时,其顶端膨大,呈分泌毛状,后呈根毛状。下胚轴毛的主要功能是起固着作用。下胚轴毛发育后期,在其保留细胞核的膨大的基部和突起的毛状体之间形成一细胞壁,此时毛状体便开始萎缩脱落。下胚轴毛的基部重新形成完整的表皮细胞。
关键词:  下胚轴  生毛细胞  下胚轴毛  慈菇  
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