- 根毛層
- 根毛區(qū)
- root: vi. 〔美俚〕應(yīng)援，聲援；支持，贊助；歡呼，喝彩。
- hair: n. 1.〔集合詞〕毛發(fā)，頭發(fā)，汗毛。 2.毛狀物；毛狀 ...
- zone: n. 1.【地理】(地)帶。 2.區(qū)域，范圍，界。 3. ...
- hair root: 毛根; 須根
- root hair: 根毛
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root hair zone中文什么意思
- 根毛層
- 根毛區(qū)
下載手機詞典可隨時隨地查詞查翻譯
例句與用法
- We have observed the following characteristics of anatomical structure and development : ( 1 ) the primary roots belong to archetype and the lateral roots occur in the position toward the xylem of the vascular cylinder ; ( 2 ) the root endodermis consists of thicken casparian strips , and there are from two lo four layers parenchyma cells near the pericycle ; ( 3 ) the pith and resins canals are absent in the toots ; ( 4 ) secondary structure occurs in the root hair zone , and vascular cambium is formed from the parenchyma cells between the primary xylem and primary phloem ; ( 5 ) tanning materials are abundant in pericycle cells and phelloderm cells ; ( 6 ) sclereids are found in secondary phloem , and rays are rather rich in secondary xylem
結(jié)果表明：氣生不定根具有以下結(jié)構(gòu)特征和發(fā)育特點： ( 1 )根為二原型，側(cè)根正對著木質(zhì)部發(fā)生； ( 2 )幼根內(nèi)皮層細(xì)胞具凱氏帶加厚，維管柱內(nèi)緊挨中柱鞘內(nèi)側(cè)具有2 ~ 4層大型薄壁細(xì)胞； ( 2 )根中無髓和樹脂道； ( 4 )次生結(jié)構(gòu)發(fā)生于根毛區(qū)，維管形成層由初生木質(zhì)部和初生韌皮部之間的薄壁細(xì)胞轉(zhuǎn)化形成； ( 5 )中柱鞘和栓內(nèi)層細(xì)胞富含單寧類物質(zhì)； ( 6 )次生韌皮部有石細(xì)胞，次生木質(zhì)部射線發(fā)達(dá)。