Difference Between Root Hair and Stem Hair

Thekey differencebetween root hair and stem hair is that theroot hair is a unicellular structure developed as an outgrowth of theepidermis, while the stem hair is a multicellular structure that is not an outgrowth of the epidermis.

根和茎是植物的两个主要部分。茎存在于土壤表面上方，而根部存在于土壤内。茎直立，而根部向土壤生长。因此，茎显示阳性phototropicmovements, while root shows positivegeotropicmovements. Stems have stem hairs, which are multicellular structures. Similarly, roots have root hairs, which are unicellular structures. Structurally, stem hairs are additional cells, while root hairs are outgrowths of the epidermis. Likewise, there are many other differences between root hair and stem hair, which we will be discussing in this article.

内容

1.Overview and Key Difference
2.What is Root Hair
3.What is Stem Hair
4.Similarities Between Root Hair and Stem Hair
5.Side by Side Comparison – Root Hair vs Stem Hair in Tabular Form
6.概括

What is Root Hair?

Root hair is an important structure of a plant. It is a unicellular and tubular structure developed as an outgrowth of epiblema cells. Moreover, these hairs are present only at the zone of maturation of the root tip. Generally, these hairs are unbranched lateral extensions designed to absorb water and nutrients from the soil. Hence, root hairs have a large surface area. Water enters the细胞质of root hair cell via渗透. It occurs due to the low water potential of the root hair cell compared to the water potential of the soil solution.

Root hairs are visible under the light microscope as well to our naked eye. Unlike other plant cells, their cells do not contain chloroplasts. Also, these hairs survive a short time, and new hairs replace the old ones constantly. Their lifetime is about two to three weeks, and then they die, allowing new root hairs to emerge.

What is Stem Hair?

茎头发是分布在植物茎上的多细胞结构。与根毛不同，它们不是表皮的生长。它们是其他细胞。并且，茎头发的主要功能是蒸腾速率的降低。

Moreover, stem hairs are cutinized, unlike root hairs. Also, they can be branched or unbranched. Besides, they survive for a long time on the stem of the plants.

What are the Similarities Between Root Hair and Stem Hair?

• Root hair and stem hair are two structures of plants.
• 它们是横向扩展。
• Also, both structures are important since they carry out significant functions in the plants.
• Moreover, both are visible to our naked eye.
• 一些茎头发和所有根毛都是无分支的。

What is the Difference Between Root Hair and Stem Hair?

根毛是表皮的产物，它吸收了水和土壤中的营养。而茎头发是茎上存在的横向延伸，可减少蒸腾作用。这不是表皮的产物。因此，这是根毛和茎头发之间的关键区别。此外，根头发始终是单细胞结构，而茎头发主要是多细胞的。因此，这也是根毛和茎头发之间的显着差异。

Moreover, root hair is always unbranched, while stem hair can be unbranched or branched. Also, stem hairs are present everywhere in the stem, while root hairs are present at a particular region of the root.

The below infographic summarizes the difference between root hair and stem hair, comparatively.

概括– Root Hair vs Stem Hair

根毛是根部表皮的产物，而茎头发是整个植物茎的横向延伸。但是，它们不是表皮的生长。因此，我们可以将其视为根毛和茎头发之间的关键区别。此外，根部头发是单细胞的，而茎头发主要是多细胞的。除此之外，根部头发是无分支的，而茎头发可以分支或未分支。此外，根部头发吸收了土壤中的水和养分，而茎头发则降低了蒸腾速度。因此，这总结了根毛和茎头发之间的差异。

Reference:

1. Grierson, Claire, and John Schiefelbein. “Root Hairs.” The Arabidopsis Book, American Society of Plant Biologists,Available here.

Image Courtesy:

1. “NSRW Root-Tip” (Public Domain) viaCommons Wikimedia
2. “Cap1033-botao1” By The original uploader was Lrothc at English Wikipedia. – Transferred from en.wikipedia to Commons(CC BY-SA 2.5)viaCommons Wikimedia