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木质部发生的英文

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"木质部发生"怎么读用"木质部发生"造句

英文翻译手机手机版

  • xylogenesis

例句与用法

  • In seed plants the protoxylem occurs at the innermost edge of the vascular bundles in stems , but external to the later - formed xylem in roots
    在种子植物中,原生木质部发生在茎的维管束的最内方,但在根中,位于后生木质部的外方。
  • 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。
  • Under the condition of different soil humidity and measuring time , a series of ecophysiological indexes , such as net photosynthetic rate , transpiration rate , stomatal conductance , the flow of water , atmospheric temperature , relative humidity , photosynthetic available radiation , and hydraulic conductivity are measured in order to find the factors which cause robinia xylem embolism
    摘要在不同的土壤水分含量和不同的测定时间条件下,对刺槐的一系列生理生态指标:净光合速率、气孔导度、蒸腾速率、水势、大气温度、相对湿度、光合有效辐射以及导水率进行测定,探求刺槐木质部发生栓塞的影响因子。
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