Difference Between Endosperm and Perisperm

Thekey differencebetween endosperm and perisperm is thatendosperm is a nutritive tissue of the seed that istriploidin nature, while perisperm is another nutritive tissue of the seed that isdiploid在自然界。

Seed plants have two major categories as被子植物和gymnosperms. Angiosperms bear closed seeds while gymnosperms bear naked seeds. The seed is the fertilizedovuleof seed plants which germinates and develops into a new plant. Thus, it contains the developing embryo. There are two nutritive tissues inside the seed of higher plants. They are endosperm and perisperm. Endosperm develops as a result of double fertilization in flowering plants due to an event called triple fusion. It contains triploid cells. On the other hand, perisperm originates from the nucellus, and it contains diploid cells.

内容

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

什么是胚乳？

胚乳是开花植物种子的主要营养组织。它围绕着发育中的胚胎，并用食物滋养它，主要是以淀粉的形式进行滋养。除淀粉外，胚乳还含有脂肪和蛋白质。此外，胚乳是由于三重融合而形成的，其中精子核与胚囊的双核中心细胞融合。因此，它本质上是三倍体。胚乳主要在许多植物中寿命短，因为它被发育中的胚胎消耗。然而，在内染色种子中，胚乳长期存在。

然而，某些植物种子不包含胚乳。在那些植物中，perisperm充当营养组织。在谷物中，最营养的部分是含有胚乳的种子。因此，谷物是人类和动物的好食物来源。椰子具有含有生长物质的液体胚乳。

What is Perisperm?

Perisperm is another form of nutritive tissue present in seeds of several plant families. It develops from the nucellus. Hence, it is purely of maternal origin and is diploid in nature. Perisperm surrounds the endosperm of the seeds. Thus, endosperm absorbs nutrients from the perisperm.

与胚乳不同，perisperm是干的。它主要包含淀粉。但是，与胚乳不同，它不包含蛋白质。

What are the Similarities Between Endosperm and Perisperm?

• Both endosperm and perisperm are nutritional tissues found inside the seeds.
• They are present in angiosperms.
• Also, both contain starch mainly.
• They develop parallelly.
• Moreover, both contain maternal parts.
• Furthermore, they provide nutrition for the developing embryo.

What is the Difference Between Endosperm and Perisperm?

The endosperm is a food reserve in seeds that is triploid in nature. On the other hand, perisperm is another form of nutritive tissue in seeds of certain plant families. It is derived from the nucellus and is diploid in nature. So, this is the key difference between endosperm and perisperm. Furthermore, the endosperm surrounds the embryo while perisperm surrounds the endosperm. Therefore, we can consider this also as a difference between endosperm and perisperm.

此外，胚乳通常是柔软的，而perisperm干燥。因此，这也是胚乳和perisperm之间的区别。

The below infographic provides more information on the difference between endosperm and perisperm.

概括– Endosperm vs Perisperm

Endosperm and perisperm are two nutritive tissues inside the seeds. But, the endosperm is triploid in nature while perisperm is diploid in nature. So, this is the key difference between endosperm and perisperm. Both endosperm and perisperm contain starch. But, endosperm contains proteins as well. However, perisperm does not contain proteins. Furthermore, endosperm develops as a result of triple fusion while perisperm develops from the nucellus. Besides, endosperm consists of both maternal and paternal parts, while perisperm is purely maternal. Thus, this summarizes the difference between endosperm and perisperm.

Reference:

1.“胚乳。”胚乳,概述|科学irect Topics,Available here.
2.“种子”。Wikipedia，Wikimedia基金会，2019年6月13日，Available here.

Image Courtesy:

1.“Wheat-kernel nutrition” By Wheat-kernel_nutrition.svg: Jkwchuiderivative work: Jon C (talk) – Wheat-kernel_nutrition.svg(CC BY-SA 3.0)viaCommons Wikimedia
2.“来自“基本植物学”（1898）的第265页的图像Internet Archive Book Images(没有已知的版权限制） 通过Flickr