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Dicotyledonous and Monocotyledonous Seed

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Introduction

MVSAT 2024

A Dicotyledonous Seed is a seed produced by a plant belonging to the botanical group identified as Dicotyledons. This group includes plants such as buttercups and butterbeans. A Monocotyledonous Seed is a seed produced by a plant belonging to the botanical group identified as Monocotyledons. This group includes plants such as lilies and Lychee trees.


All You Need to Know About Seed

For sexual reproduction in plants, seeds are an essential element. This is formed as the end product of sexual reproduction in plants, and this is only for angiosperms and gymnosperms.

 

Gymnosperm seeds are exposed because they have no fruits or flowers. On the other hand, angiosperms have matured ovules that will develop within the fruit after fertilization. This will consist of an embryo that is enclosed in a protective outer covering called the seed coat. An embryo is of three types - a radicle, an embryo axis and cotyledons. Based on the number of Cotyledons, seeds are divided into two -  

  1. Monocots(Monocotyledons)

  2. Dicots (Dicotyledons)


Now, we will see what are Monocots and Dicots:

 

What are Monocot Seeds?

Monocots will have only one seed leaf inside the seed coat. Most of the time it is only a thin leaf because the endosperm to feed the new plant is not inside the seed leaf.

 

Examples of Monocot Seeds:

Rice, wheat, maize, bamboo, palm, banana, ginger, onion, garlic, lilies, daffodils, iris, tulips are examples of Monocot seeds.

 

Characteristics of Monocot Seeds:

  1. Cotyledon is single with an embryo.

  2. Pollen is single with the pore.

  3. Parts of the flower are in multiples of three.

  4. The parallel of major leaf veins.

  5. Scattered stem vascular bundles.

  6. Adventitious roots.

  7. Absent of secondary growth. 

 

Structure of Seed Monocot:

The structure of Seed monocot is explained below:

  1. Embryos of monocot seeds have one large cotyledon, and that’s called scutellum. This scutellum is shield-shaped and is located towards the side of the embryo axis. In monocot seeds, the endosperm is covered from a proteinous layer called aleurone layer. The embryo axis of monocots is of shoot tip; they are enclosed in a sheath called coleoptile and a root tip radicle which is enclosed in coleorhiza.

  2. Most of the monocot seeds are thick, swollen endosperms for nourishment. They are also called albuminous. During the embryo development, the endosperms are not entirely developed, and it is the nourishing tissues in seeds.


What are Dicot Seeds?

Dicot seeds(Dicotyledons) are the seeds which have two embryonic leaves and cotyledons. They are one of the two groups into which all the flowering plants were divided.

 

Examples of Dicot Seeds:

Bitter gourd seeds, Castor seeds, Mango seeds, Neem Seeds, Night Jasmine seeds, Papaya seeds and Tamarind seeds.

 

Characteristics of Dicot seeds: 

  1. It contains two cotyledons.

  2. The outer covering of dicot seed is the seed coat, which has two layers called outer testa and inner tegmen.

  3. The embryo stays within the seed coat and includes an embryonic axis and two cotyledons. These cotyledons are mostly fleshy and full of reserve food materials.

 

Structure of Dicot Seeds

Dicots are also known as Dicotyledons. All the flowering plants or angiosperms are divided into groups. So far there are about 2,00,00 species of cotyledons have been discovered. In dicots, the embryo will have an embryo axis and two cotyledons. The appearance of cotyledons is swollen as they preserve the food for developing seedlings. There are two ends for the embryo axis. The formation of the shoot tip is called plumule and the root tip at the lower end is called the radicle. This content is covered with a protective coat called seed coat which is made up of Testa and Tegmen.

 

Difference Between Monocots and Dicots Seeds:

Monocots

Dicots

Monocots have single cotyledon

Dicots have two cotyledons

Leaves of monocots have parallel veins

Leaves of dicot have branched veins

Parts of the flowers in monocot are in threes

Parts of the flower in the dicot are more than three.

Vascular bundles are throughout the stem’s ground tissue

Vascular bundles are arranged in a ring 

Monocots have one pore

Dicots have 3 pores

Fibrous root system

Taproot system

Thin and small, lacks food materials

Fleshy and stores food

Endosperm is present and stores food

The endosperm is absent and lacks food

Secondary cambium is absent

Secondary cambium is present

Monocot leaves have parallel venation

Dicot leaves have reticulate venation


Importance of studying  Dicotyledonous and Monocotyledonous Seeds are as follows:

  1. Dicotyledonous seeds can be found in plants that are very wide-spreading, they are the second dominant group of plants, and they are adapted for life in bogs. The importance of studying Dicotyledonous Seed is that Dicotyledonous plants are adapted to live in bogs and are second in dominance. The importance of studying Monocotyledonous Seed is that Monocotyledonous Seed can be found in plants that are very wide-spreading, they are the second dominant group of plants, and they are adapted for life in bogs.

  2. Dicotyledonous seeds are the second dominant group of plants, so it is important to be able to identify and research any. Monocotyledonous Seed: Monocotyledons like lilies and Lychee trees, both of which grow in the wider environment, and are the second most dominant group of plants. Studies on Monocotyledons are important because they are the second dominant group of plants, and because they grow wider than Dicotyledons.


Here are Some best Ways to Study Dicotyledonous and Monocotyledonous Seed:

  1. Learn the Difference - It is very important to understand the difference between the two types of Seed, what things make them different from each other, and why that difference is important in their reproduction.

  2. Dicotyledonous seeds are the second dominant group of plants, so it's important to be able to identify and research any.

  3. Study Last Year's Question Papers - Solving last year's question papers will help you to not repeat mistakes and will provide insight and knowledge on the necessary steps required for the process and test and how it should be solved.

  4. Division and Equivalence - Study how they can be divided and/or used to solve equations and made equivalent, and how the two types of seed can be made equivalent.

  5. Avoid Last - Minute Studying - Avoid last-minute studying and study a little every day because it is better to be well prepared than to be cramming at the end.

  6. Gain Practical Knowledge About Seeds - For best practical knowledge about seeds learn from scientists and practical knowledge from your work or area of study because that will provide the best understanding.

  7. Understand the Concept - Understand the concept and gain theoretical knowledge before looking at examples because looking at examples before understanding can cause confusion and can cause the student to get mixed up in the process. 

  8. Know the Key Differences - Nurture a deep understanding of the key differences between the two seed types and produce knowledge from those differences. 

  9. Making Problems Easier - Creating problems out of those found in past years' exam questions can make students feel as if they are studying with familiar questions and as a result find the process easier. 

  10. Latest Exam Questions by Subject - Being updated with recent exams and questions means that they will be able to relate and be updated with the latest questions and challenges and will also be able to relate and be updated with recent exams and questions.

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FAQs on Dicotyledonous and Monocotyledonous Seed

1. What are the Three Types of Embryo?

The three types of the embryo are - embryo axis, radicle, cotyledon.

2. What is Dicot? Give a Dicot Example.

It's a group of flowering plants that have two seed leaves. Dicot Example- Bitter gourd seeds, Castor seeds, Mango seeds.

3. What is Monocot? Give Monocot Example

Mono means one and a cotyledon is a seed leaf. Monocot Example - Rice, wheat, maize, bamboo, palm, banana, ginger.

4. Can Dicot Seeds Store Food Materials?

Yes, dicot seeds can store food materials.

5. What is Scutellum?

Embryos of monocot seeds have one large cotyledon which is called scutellum.

6. What does an Embryo Consist of in Dicot?

In dicot, the embryo consists of the embryo axis and two cotyledons.

7. How many Species of Dicotyledons are Discovered so far?

Around 2,00,000 species of dicotyledons have been discovered.

8. What is the Seed Coat Made up of ?

The seed coat is made up of an outer layer called testa and an inner layer called tegmen.


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