pith rays 中文意思是什麼
pith rays
解釋
樹心髓線-
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。 -
Ground meristem the central region of the apical meristem from which the ground tissues of pith, cortex, medullary rays, and mesophyll differentiate. in root meristem it is also called periblem
基本分生組織：位於頂端分生組織的中部，髓、皮層、髓射線以及葉肉這些基本組織均是由基本分生組織分化而成。根部分生組織也稱為皮層原。 -
With the different development degree of the stem, the distributions of anthraquinone compounds showed different characteristics in the epidermis, cortex, vascular bundle and pith rays
結論蒽醌類化合物在莖中的分佈是多位點的，隨著莖發育程度的不同，其表皮、皮層、維管束和位射線中蒽醌類化合物的分佈表現出不同的特點。
分享友人