文档介绍：摘要石蒜属植物是一类既有观赏价值已有很多学者对石蒜属植物做了研究结构发育方面,至今仍没有报道。又有药用价值和工业价值的植物,此前, 其研究领域也涉及到了很多方面,但对其本文以石蒜科石蒜属植物一一中国石蒜和石蒜为材料,对石蒜属植物叶(包括叶片和鳞叶)的发育过程、结构和内含物方面做了初步的研究,研究内容有以下几个方面: (1)中国石蒜叶片分化方面的研究。石蒜属植物的叶片由带状叶片(地上部分)和叶鞘(地下部分,将来发育成鳞叶)组成,本文通过石蜡切片法对中国石蒜茎尖做纵切面和扫描电镜观察研究发现,中国石蒜叶片的分化要经历四个阶段:叶原座的形成、叶原基的生长、带状叶片的形成和叶鞘的形成。其中叶鞘的形成是由于带状叶片的伸长过程中,其基部两侧形成褶,褶最后闭合成筒状,成为叶鞘。(2)石蒜叶片生长方式的探讨。通过画均等线的方法和叶表皮封片法,对石蒜叶片露地后的生长方式做了研究。石蒜叶片露地后的生长是靠叶片基部的伸长来实现的,叶片的宽度和厚度在露出地面后基本不变化;随着叶片的伸长,其叶表皮细胞的长度也逐渐增大,但叶表皮面积的扩大,更大程度上依赖于叶表皮细胞的分裂。(3)中国石蒜叶片分泌结构的发育。本文通过石蜡切片法,对不同成熟度的中国石蒜叶片(带状叶片和鳞片)做横切面,研究中国石蒜叶片中分泌道的结构、发育和形成方式。结果是,带状叶片和鳞片中的分泌道在形成方式上有差异, 带状叶片中的分泌道是溶生的,。(4)中国石蒜鳞片中的内含物及其形态。本文主要通过石蜡切片法、徒手切片法和扫描电镜法对鳞片中的内含物做了研究。鳞片中的内含物是淀粉粒、粘液物质和晶体。晶体主要以晶簇的形态存在,晶簇球状,由许多棱柱状的结晶聚集而成;淀粉粒大多存在于靠近外表皮的薄壁细胞中,近圆形。关键词:石蒜属;带状叶片;鳞片;发育 Abstract: Lycoris iS valuable as an they are also used in medicine and tonow,many scholars have studied on Lycoris, and their researches have covered many aspects,but,any report has been not found initsdevelopment of structure. In this leaves included zonary leaves and squamas of Lycoris chinesis and ofAmaryllidaceae were studied on the procedure ofdevelopment,structures and inclusions,the main contents were as follows: r 11 The differentiation ofleaves was leaves ofLycoris posed of overground zonary leaves and underground sheaths which would be changed into squamas stem apex of was slitby the use ofparaffin method and delt with scanning electronmicroscopy, and the results were indicated that:the differentiation e through four were the period of leafbuttress development of leaf primordium and the stages of straplike leaf and sheath this process,the plaits appeared atthebilateral base oftheleafwith the zonary leafstretching, in theend,the plaits closed,and thesheath was fcIrmed (2)The growth mode of￡.radiata leaves was thischapter, the methods of drawing equal distance lines and leaf epide