Difference Between Epicotyl and Hypocotyl

Key Difference – Epicotyl vs Hypocotyl

Seedgermination是植物开发的重要方面。仅当存在正确的发芽条件时，它用于发芽的机制才会发生。当环境因素不利时，种子不会发芽。这称为种子休眠。一旦种子发芽，它将生长成不同的结构，这些结构是植物生长的初步结构。下胚轴和上皮基是两个这样的重要结构。The epicotyl is a portion of the embryonic axis that lies betweencotyledonsand the plumule while the hypocotyl is the portion of the embryonic axis that lies in between the point of attachment known as the cotyledonary node and the radicle.This is thekey difference在上腹和下胚轴之间。

内容

1.Overview and Key Difference
2.What is Epicotyl
3.什么是下胚轴
4.Similarities Between Epicotyl and Hypocotyl
5.并排比较 - 表格形式的上皮基与下胚轴
6.概括

What is Epicotyl?

epicotyl是位于子叶和羽状物之间的胚胎轴的一部分。在植物生命的最初阶段，苏糖基是植物的重要组成部分。期间hypogeal germination, the epicotyl is elongated that the plumule is pushed above the soil surface leaving the cotyledons to remain in the soil. The epicotyl forms the important part of the embryonic shoot system. An epicotyl is situated in the region in the stem of a seedling that is situated above the stalks of the seed leaves in the embryo plant. An epicotyl usually grows very rapidly while extending the stem above the ground. It also shows hypogeal germination during growth where a hook-like structure is formed during the germination process.

上皮基形成芽的先端和叶子原始，通过在地面上方膨胀和伸张，而子叶将保持在地面的下方。The epicotyl is known as the embryonic shoot that is above the cotyledons. Eventually, the epicotyl will be developed into leaves of the plant receptors known as phytochrome photoreceptors that are found to be controlling the lengthening of the epicotyl throughout. Epicotyl is terminated with the plumule.

Indicotyledonous plants, the stem located at the base that is under the cotyledons is called the hypocotyl while the shoot above the cotyledon is called the epicotyl. In the monocotyledonous plants, from where the shoots and leaves emerge initially, the first shoot that appears above the ground or from the seed is known as the epicotyl.

什么是下胚轴？

下胚轴是胚胎轴的一部分，位于共叶节淋巴结和梯形之间。下胚轴形成了胚胎根系的重要部分。植物的下胚轴是在梯形上方和子叶下方发现的发芽幼苗的茎。已知该下胚轴是幼小植物的主要器官，该植物有助于植物延伸并发展为茎。

This radicle eventually becomes the primary root where it will be penetrated down into the soil afterward. During theepigeal germination, the hypocotyl is elongated that the cotyledons are pushed out of the soil surface.The hypocotyl emerges and the tip that is growing including the seed coat is lifted above the ground once the radicle emerges. The lifting growing tip would be bearing embryonic leaves called the cotyledons and the plumule that gives rise to mature true leaves later. The hypocotyl may become enlarged and function as a storage organ in some plant. For example, in Cyclamen, the hypocotyl acting as the storage organ is called the块茎.

What is the Similarity Between Epicotyl and Hypocotyl?

• They are preliminary structures of plant growth after seed germination

上腹和下胚轴有什么区别？

epicotyl与下胚基
epicotyl是位于子叶和羽状物之间的胚胎轴的一部分。	下胚轴是胚胎轴的一部分，位于称为共叶节淋巴结和梯形之间的附着点之间。
终止
epicotyl用羽端终止。	The hypocotyl is terminated with the radical.

概括–epicotyl与下胚基

种子发芽是植物开发的重要方面。epicotyl是位于子叶和羽状物之间的胚胎轴的一部分。在植物生命的最初阶段，苏糖基是植物的重要组成部分。上皮基形成芽的先端和叶子原始，通过在地面上方膨胀和伸张，而子叶将保持在地面的下方。epicotyl用羽端终止。下胚轴是胚胎轴的一部分，位于称为共叶节淋巴结和梯形之间的附着点之间。下胚轴形成了胚胎根系的重要部分。梯形最终成为主要根。下胚轴用梯形终止。这是苏映基和下胚轴之间的差异。

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Reference:

1.“Hypocotyl.” Encyclopædia Britannica, Encyclopædia Britannica, inc.Available here
2 .“上胚轴。”Encyclopædia大英百科全书,Encyclopædia Britannica, inc.Available here

Image Courtesy:

1.’Cyclamen ‘Stirling”By JJ Harrison ([电子邮件保护]) – Own work,(CC BY-SA 3.0)viaCommons Wikimedia