xylem中文意思是什麼

xylem 的中文意思

xylem 例句

1. The annual rings of plants growing in temperate climates can be seen in crosssection as two consecutive rings of light and dark - colored xylem tissue
   在有顯著季節性氣候的地區中，不少植物的次生木質部在正常情況下，每年形成一輪（色淺層和色深層） 。
2. Observation and study of vessel elements of secondary xylem in bombax malabaricum
   次生木質部導管分子觀察研究
3. Intrafascicular cambium ( fascicular cambium ) the part of the vascular cambium within the vascular between the xylem and phloem
   束中形成層：是位於木質部和韌皮部構成的維管束內的一部分維管形成層。
4. 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
   結果表明：氣生不定根具有以下結構特徵和發育特點： （ 1 ）根為二原型，側根正對著木質部發生； （ 2 ）幼根內皮層細胞具凱氏帶加厚，維管柱內緊挨中柱鞘內側具有2 ~ 4層大型薄壁細胞； （ 2 ）根中無髓和樹脂道； （ 4 ）次生結構發生於根毛區，維管形成層由初生木質部和初生韌皮部之間的薄壁細胞轉化形成； （ 5 ）中柱鞘和栓內層細胞富含單寧類物質； （ 6 ）次生韌皮部有石細胞，次生木質部射線發達。
5. In cultivated salvia miltiorrhiza roots, light - colored periderm contained less layers of cells and low ratio of phloem to xylem , compared with those in wild salvia rniltiorrhiza roots
   栽培丹參根的周皮細胞層數少、色淡，韌皮部與木質部比值小，而野生丹參根的周皮細胞層數多、顏色重，韌皮部與木質部比值大。

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