【作者】 贾晋；

【导师】 郝丽珍；

【作者基本信息】 内蒙古农业大学 ， 蔬菜学， 2003， 硕士

【摘要】 本试验采用石蜡切片研究了沙芥发芽期、幼苗生长期各器官形态及解剖结构的变化过程；并对采自鄂尔多斯市野生沙芥花、果实、种子及人工栽培的叶片旺盛生长期、叶片生长衰退期的根、茎、叶等材料进行了形态及解剖学研究，结果表明：沙芥发芽期根、茎、叶各器官内组织已开始分化；幼苗期已分化出发达的输导组织及贮水组织；叶片旺盛生长期各器官具有发达的输导组织，但机械组织不发达，因此沙芥的根茎叶适于食用。此外，叶片旺盛生长期、衰退期根茎具发达的髓，髓内有异常次生生长形成的维管组织，贮藏养分，为沙芥次年形成二年生植株提供营养，沙芥各器官在解剖结构方面都形成了特化结构如具表皮及副表皮、泡状细胞、短的导管分子及环栅型叶等以适应干旱的环境，因此沙芥各器官的形态及解剖特点与其抗旱、适应沙漠环境有密切的关系。更多还原

【Abstract】 This experiment to adopt the method that paraffin was cut into slices studied the structural growth process on appearance and dissect of Pugionium cornutum(L)Gaertn in germination period and young sprout ;And to adapt wild flower, fruit, seed and cultivated root,stem and leaf of Pugionium cornutum(L.)Gaertn in leaf lushing period and leaf exhausting period from EERDUOSI City proceeded the research on appearance and anatomies . the result enunciates:The organs of Pugiorium cornutum(L.)Gaertn in root, stem and leaf have starteddividing in germination period;the transporting tissue and storing water tissue in young sprout period has been divided;the ransporting tissue is flourishing,but the supporting tissue is unflourishing,so the root,stem and leaf of Pugionium cormutum(L)Gaertn is suitable for edibility . In addition, the pith of root and stem is flourishing for prosperous growth period and declining period ,the vascular tissue storing the nutrient and providing the nourishment for the biennial plant in next year from abnormal secondary growth is developing in pith ,unusual structure eg. epidermis and vice- epidermis, bubble form cell, short pipe numerators and wreath grid types leaf etc. in each organ of Pugionium comutum(L.)Gaertn.had been formed to adapt to dry environment,so the characteristics on appearance and anatomies in Pugionium cornutum(L)Gaertn. has closely of relation with its anti- drought and its adapting to desert environment.更多还原