幼根 meaning in English
radicle
rootlet
Examples
- Coleorhiza ( pl . coleorhizae ) the protective sheath surrounding the radicle in grasses
胚根鞘：保护幼根的鞘状结构。 - As concentration of salt solution increased , the vigor index , germination index and the length of shoot and radical gradually decreased . the radicle was sensitive to salt stress and had low tolerance . it can be concluded that p . hendersonii has high salt tolerance , h . strobilaceum has low salt tolerance
随着盐溶液浓度的升高，大叶白麻和盐节木种子的活力指数和发芽指数下降，幼芽和幼根的长度逐渐变短，幼根对盐分胁迫敏感，忍耐力不强。 - 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
结果表明：气生不定根具有以下结构特征和发育特点： ( 1 )根为二原型，侧根正对着木质部发生； ( 2 )幼根内皮层细胞具凯氏带加厚，维管柱内紧挨中柱鞘内侧具有2 ~ 4层大型薄壁细胞； ( 2 )根中无髓和树脂道； ( 4 )次生结构发生于根毛区，维管形成层由初生木质部和初生韧皮部之间的薄壁细胞转化形成； ( 5 )中柱鞘和栓内层细胞富含单宁类物质； ( 6 )次生韧皮部有石细胞，次生木质部射线发达。