V2EX epigeal

Epigeal

定义 Definition

epigeal(形容词):指(植物)地上出土的;尤指上胚轴伸长、子叶被抬到地面以上的萌发类型(与 hypogeal 地下子叶萌发相对)。在动物学语境中也可泛指“在地表上/近地表生活的”。

发音 Pronunciation (IPA)

/pdil/

词源 Etymology

来自希腊语构词:**epi-**(在……之上)+ (地、土地)+ 形容词后缀 -al,字面意思就是“在地面之上的”。

例句 Examples

Epigeal germination lifts the cotyledons above the soil.
地上出土萌发会把子叶抬到土壤表面以上。

In many beans, epigeal seedlings emerge quickly, exposing their cotyledons to light and enabling early photosynthesis, though this can increase vulnerability to frost or herbivores.
在许多豆类中,地上出土型幼苗会较快出土,让子叶见光并尽早进行光合作用,但这也可能增加其受霜冻或食草动物危害的风险。

相关词 Related Words

文学与典籍 Literary Works

  • Campbell Biology(《坎贝尔生物学》):在种子萌发与幼苗形态章节常用 epigeal/hypogeal 对比说明。
  • Raven Biology of Plants(《乌鸦植物学》/《植物生物学》):讨论幼苗建立与子叶功能时出现该术语。
  • Taiz & Zeiger, Plant Physiology and Development(《植物生理学与发育》):在早期发育与形态建成相关内容中使用该词。
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