Bifacial leaf and mesophyll tissue contain crystals , phloem is rich in saliferous vacuoles , and the mechanical tissue is developed 異面葉,葉肉組織中含有晶體,韌皮部內(nèi)富含含鹽液泡泡,機(jī)械組織發(fā)達(dá)。
There are 2 - 3 layers of long - column - shaped palisade tissue under the upper epidermis , and there are a great number of mechanical tissues which made up of vascular bundle sheath 上表皮下方有2 - 3層長柱形的柵欄組織,在主脈大側(cè)脈外方具有由大量機(jī)械組織組成的束帽或束鞘。
Palisade parenchyma takes a larger proportion than spongy tissue in mesophyll . different from other dicotyls , the cortex in c album l . is composed of mechanical tissue and assimilating tissue , which are alternately arranged with each other 藜與其它雙子葉植物不同,其莖的皮層呈明顯的機(jī)械組織和同化組織相間排列,其中同化組織形態(tài)類似海綿組織細(xì)胞;機(jī)械組織突起成棱。
14 species are edible plants , 37 species are medicinal plants , 11 species are ornamental plants and31 species are feeding plants , the major types of halophytic vegetation in hebei province include ptenothalophyta such as tamarix chinensis brush and siberian brush , and littoral halophytic vegetation such as succulent vegetation , poion , chomophyte and etc . epidermal cell exosporium of tamarix chinensis blade is papillous and capillaceous ; stoma and salt - secreting gland are under the epidermis ; differentiation level of mesophyll tissue is rather high ; porder camber is obvious ; and mechanical tissue is developed 河北省鹽生植物的經(jīng)濟(jì)價值較高,其中可食用的鹽生植物共計14種,可藥用的鹽生植物37種,可飼用的鹽生植物31種,具有觀賞價值的鹽生植物11種,可以作為纖維植物計約9種。河北省主要鹽生植被類型有檉柳灌叢、西伯利亞白刺灌叢等落葉灌叢和肉質(zhì)型、禾草型、雜類草型鹽塵植被等濱海鹽生植被。
In this project , culms of lodging - sensitive and lodging - resistant varieties of wheat ( triticum aestivum l ) were compared at the morphological level to determine the anatomical features that are associated with these traits . this analysis revealed that lodging resistant culms are short , possess thicker mechanical tissue , and had larger vascular bundles 首先以不同品種的小麥為實(shí)驗材料,對其主要非葉器官?莖稈,從解剖結(jié)構(gòu)、木質(zhì)素含量、以及抗倒伏的力學(xué)特性等方面做了詳細(xì)的比較研究。
There are many adaptive changes in the two research subjects ( artemisia . songarica schrenk . and seriphidium . santolinum ( schrenk ) polijak . ) in morphology and anatomy , such as with the increase of the daily age , the root - shoots ratio increased ; the root became stronger ; the ratio of leaf volume and leaf area increased ; the volume of epidermic cell decreased ; the cut - icle and phellem layer on the surface of root thickened . stoma caved in leaf ; epidermal hair of leaf and stem well - developed , palisde tissue developed well , the cell gap decreased ; the spongy tissue disappeared ; leaf is kinds of isolateralthat is the typical xeromorphic structure ; crystal cell and fibric cell increased ; conducting tissue and mechanical tissue developed well ; bundle sheath appeared 實(shí)驗研究的兩種菊科( compositae )植物(準(zhǔn)噶爾沙蒿( artemisiasongaricaschrenk )和沙漠絹蒿( seriphidiumsantolinum ( schrenk ) poljak . ) ) ,形態(tài)解剖方面的變化表現(xiàn)為:隨日齡增加,根長/株高比值日益增大;根系逐漸發(fā)達(dá);體積與葉面積比逐漸增大;表皮細(xì)胞體積變?。唤琴|(zhì)層增厚;根外部出現(xiàn)加厚的木栓層;氣孔下陷;葉、莖部的表皮毛密布,柵欄組織日益發(fā)達(dá);而細(xì)胞間隙日漸變小;海綿組織逐漸消失;葉面結(jié)構(gòu)常為典型旱生結(jié)構(gòu)? ?等葉面;晶細(xì)胞及纖維細(xì)胞數(shù)目增多;輸導(dǎo)組織、機(jī)械組織日漸發(fā)達(dá);具有維管束鞘等等。