亚洲免费av电影一区二区三区,日韩爱爱视频,51精品视频一区二区三区,91视频爱爱,日韩欧美在线播放视频,中文字幕少妇AV,亚洲电影中文字幕,久久久久亚洲av成人网址,久久综合视频网站,国产在线不卡免费播放

        ?

        四種龍膽的顯微結(jié)構(gòu)特征比較

        2015-08-08 00:58:31周雪林孫愛(ài)群李紅寧左經(jīng)會(huì)楊娟
        湖北農(nóng)業(yè)科學(xué) 2015年13期
        關(guān)鍵詞:特征

        周雪林 孫愛(ài)群 李紅寧 左經(jīng)會(huì) 楊娟

        摘要:為比較紅花龍膽(Gentiana rhodantha)與翼萼龍膽(Gentiana pterocalyx)、滇龍膽(Gentiana rigescens)與頭花龍膽(Gentiana cephalantha)的顯微結(jié)構(gòu)差異,用石蠟組織切片法及徒手切片法對(duì)4種龍膽的顯微結(jié)構(gòu)進(jìn)行了研究。結(jié)果表明,紅花龍膽與翼萼龍膽、滇龍膽與頭花龍膽顯微結(jié)構(gòu)特征有明顯區(qū)別。在根橫切面方面,紅花龍膽皮層厚,導(dǎo)管細(xì)胞橫切口徑小,無(wú)明顯射線,翼萼龍膽的特征與紅花龍膽的相反;滇龍膽與頭花龍膽的表皮和皮層早脫,次生韌皮部發(fā)達(dá),但滇龍膽韌皮部薄壁組織細(xì)胞較大,而頭花龍膽較小。在莖橫切面方面,紅花龍膽中央髓約占切面的1/3,而翼萼龍膽約占切面的1/2;滇龍膽髓僅外部有散落分布的纖維束,頭花龍膽髓部均可見(jiàn)纖維束散落分布。在葉橫切面方面,紅花龍膽中脈維管束較大,而翼萼龍膽較小;滇龍膽中脈維管束小,未見(jiàn)纖維束,頭花龍膽中脈維管束大,纖維束成對(duì)位于木質(zhì)部?jī)蓚?cè)。在葉表皮方面,4種植物表皮細(xì)胞徑向壁波曲度與氣孔指數(shù)有一定差異。根據(jù)顯微結(jié)構(gòu)特征可以將這4種植物區(qū)別開(kāi)來(lái)。

        關(guān)鍵詞:紅花龍膽(Gentiana rhodantha);翼萼龍膽(Gentiana pterocalyx);滇龍膽(Gentiana rigescens);頭花龍膽(Gentiana cephalantha);顯微結(jié)構(gòu)特征

        中圖分類號(hào):R931.5 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):0439-8114(2015)13-3159-04

        DOI:10.14088/j.cnki.issn0439-8114.2015.13.023

        Comparisons on Microscopic Characteristics of Four Gentiana Species

        ZHOU Xue-lin1,2,SUN Ai-qun1,2,LI Hong-ning1,2,ZUO Jing-hui1,2,YANG Juan1

        (1. Department of Biology Science,Liupanshui Normal University,Liupanshui 553004, Guizhou, China;2. Liupanshui Insititute of Biology, Liupanshui 553004, Guizhou, China; 3. Basic Medical College,Guiyang Medical College,Guiyang 550000,China)

        Abstract: Paraffin tissue sections were applied to compare the microscopic characteristics among 4 Gentiana species,including Gentiana rhodantha,Gentiana pterocalyx, Gentiana rigescens and Gentiana cephalantha. The results of transverse sections from roots showed that,G. rhodantha were characterized mainly by thicker cortex, smaller vessel cells and inconspicuous xylem ray than G. pterocalyx. G. rigescens and G. cephalantha were both characterized mainly by early defoliation of cuticle and developed phloem, however,G. rigescens had bigger parenchymal cells than G. cephalantha. The results of transverse sections from stems showed that,the central medulla occupied 1/3 area of the transverse section from G. rhodantha and 1/3 area from G. pterocalyx,respectively. The fibre bundles were found in the whole medulla of G. cephalantha but only in the out layer of G. rigescens. The results of transverse sections from leaves showed that,G. rhodantha ascular bundles were bigger than ones of G. pterocalyx. Compared to the G. rigescens small ascular bundles without fibre bundles, G. cephalantha had bigger ascular bundles with paired fibre bundles being bilateral to the xylem. Additionally,the 4 Gentiana species have different epidermis cells in leaves with specific radial wall and stoma characteristics. The four species could be distinguished according to the microscopic characteristics.

        Key words: Gentiana rhodantha;Gentiana pterocalyx;Gentiana rigescens;Gentiana cephalantha;microscopic characteristics

        收稿日期:2015-04-15

        猜你喜歡
        特征
        抓住特征巧觀察
        離散型隨機(jī)變量的分布列與數(shù)字特征
        具有兩個(gè)P’維非線性不可約特征標(biāo)的非可解群
        月震特征及與地震的對(duì)比
        如何表達(dá)“特征”
        被k(2≤k≤16)整除的正整數(shù)的特征
        不忠誠(chéng)的四個(gè)特征
        詈語(yǔ)的文化蘊(yùn)含與現(xiàn)代特征
        新聞傳播(2018年11期)2018-08-29 08:15:24
        抓住特征巧觀察
        基于特征篩選的模型選擇
        久久国产影视免费精品| 欧美人伦禁忌dvd放荡欲情 | 日韩精品极视频在线观看免费| 精品久久久久久亚洲综合网| 国语自产偷拍精品视频偷| 亚洲色成人网一二三区| 麻豆国产高清精品国在线| 少妇被粗大猛进进出出| 在线观看在线观看一区二区三区| 亚洲av成人无遮挡网站在线观看| 男女肉粗暴进来120秒动态图| 国产精品亚洲五月天高清| bbbbbxxxxx欧美性| 中文国产乱码在线人妻一区二区| 亚洲av无一区二区三区久久| 中文字幕无码精品亚洲资源网久久 | 一本大道色婷婷在线| 97色综合| 在线观看一区二区三区在线观看| 欧美大屁股xxxx高跟欧美黑人| 国产极品美女高潮无套在线观看| 日本一区二区视频免费观看| 一区二区三区高清视频在线| 亚洲国产精品成人久久| 亚洲va在线∨a天堂va欧美va| 国产福利美女小视频| 精品中文字幕在线不卡| 青青国产揄拍视频| 欧美色五月| 国产成人av一区二区三| 女人18毛片a级毛片| 人人做人人妻人人精| 国产在线精品亚洲视频在线| 一级r片内射视频播放免费 | 99精品久久这里只有精品| 少妇久久高潮不断免费视频| 7194中文乱码一二三四芒果| 亚洲成a人片在线观看无码| 中文字幕精品亚洲无线码二区| av免费在线免费观看| 中国熟妇人妻xxxxx|