兰州大学学报(自然科学版)
蘭州大學學報(自然科學版)
란주대학학보(자연과학판)
JOURNAL OF LANZHOU UNIVERSITY(NATURAL SCIENCES)
2013年
3期
370-376
,共7页
曹波%刘玉冰%刘美玲%李小军%谭会娟
曹波%劉玉冰%劉美玲%李小軍%譚會娟
조파%류옥빙%류미령%리소군%담회연
解剖结构%表皮微形态%芦苇%河西走廊
解剖結構%錶皮微形態%蘆葦%河西走廊
해부결구%표피미형태%호위%하서주랑
anatomical structure%epidermis%Phragmites australis%Hexi Corridor
以生长于河西走廊地区不同生境的芦苇为材料,通过扫描电镜和光学显微镜的观察,对其叶片表皮微形态及横切面解剖结构进行了分析。结果表明:不同生境芦苇表皮微形态变化中,流动沙丘的芦苇表皮以倒刺和晶体颗粒为主要特征;半固定沙丘和固定沙地的芦苇有倒刺而无晶体颗粒,但表皮毛和蜡质片层密度很高;盐湖中的材料以乳突为直观特征,除绒毛和蜡质层与固定沙丘的一致外,还具有少量晶体颗粒物;而沙碱地和戈壁的材料也具有乳突,蜡质和绒毛密度都较小,并有少许颗粒物。横切面解剖结构分析显示叶片厚度与叶肉厚度、维管束大小存在差异,大维管束木质部面积/韧皮部面积的变化为戈壁芦苇的最大,沙碱地的最小,高盐盐芦的大于低盐的,流动沙丘的大于固定沙地的。说明芦苇随着自然生境的恶化,叶片以增加表皮附属物及改变内部结构的相对比例来适应环境变化。
以生長于河西走廊地區不同生境的蘆葦為材料,通過掃描電鏡和光學顯微鏡的觀察,對其葉片錶皮微形態及橫切麵解剖結構進行瞭分析。結果錶明:不同生境蘆葦錶皮微形態變化中,流動沙丘的蘆葦錶皮以倒刺和晶體顆粒為主要特徵;半固定沙丘和固定沙地的蘆葦有倒刺而無晶體顆粒,但錶皮毛和蠟質片層密度很高;鹽湖中的材料以乳突為直觀特徵,除絨毛和蠟質層與固定沙丘的一緻外,還具有少量晶體顆粒物;而沙堿地和戈壁的材料也具有乳突,蠟質和絨毛密度都較小,併有少許顆粒物。橫切麵解剖結構分析顯示葉片厚度與葉肉厚度、維管束大小存在差異,大維管束木質部麵積/韌皮部麵積的變化為戈壁蘆葦的最大,沙堿地的最小,高鹽鹽蘆的大于低鹽的,流動沙丘的大于固定沙地的。說明蘆葦隨著自然生境的噁化,葉片以增加錶皮附屬物及改變內部結構的相對比例來適應環境變化。
이생장우하서주랑지구불동생경적호위위재료,통과소묘전경화광학현미경적관찰,대기협편표피미형태급횡절면해부결구진행료분석。결과표명:불동생경호위표피미형태변화중,류동사구적호위표피이도자화정체과립위주요특정;반고정사구화고정사지적호위유도자이무정체과립,단표피모화사질편층밀도흔고;염호중적재료이유돌위직관특정,제융모화사질층여고정사구적일치외,환구유소량정체과립물;이사감지화과벽적재료야구유유돌,사질화융모밀도도교소,병유소허과립물。횡절면해부결구분석현시협편후도여협육후도、유관속대소존재차이,대유관속목질부면적/인피부면적적변화위과벽호위적최대,사감지적최소,고염염호적대우저염적,류동사구적대우고정사지적。설명호위수착자연생경적악화,협편이증가표피부속물급개변내부결구적상대비례래괄응배경변화。
The leaf surface micro-morphology and anatomy of reed in different natural habitats of Hexi Corridor were analyzed by scanning electron microscopy and optical microscopy. The results show that mobile dune reeds epidermal were characterized by the barb and crystal particles. Semi-fixed dune reeds and fixed sand dune reeds had barbs without crystal particles, but the density of the trichomes and wax layers were very high. The materials in a salt lake had mastoid for intuitive features and a small number of crystal particles in keeping with fixed dunes reeds except for fluff and waxy layer. Sand alkali land and gobi materials also had mastoid as well as little particulate matter, but the density of wax and villus was smaller. The analysis of the anatomical structure of the cross-sectional showed that leaf thickness, mesophyll thickness and vascular size were not entirely consistent. The changes of xylem/phloem of large vascular bundles in the gobi reed were the largest and minimum in sand alkali land. The high-salt reed was bigger than the low-salt reed. With the deterioration of natural habitats, reed leaves had adapted to the environmental changes by increasing epidermal appendages and changing the relative proportions of their internal structures.