Dicotyledons seeds

  • The embryo present in the dicotyledon seed consists of an embryonal axis and two cotyledons. The cotyledons are fleshy, and they are photosynthetic and serve as food reserves for the developing embryo. 
  • The cotyledons are photosynthetic and can produce food for the growing embryo.
  • The outer layer of the dicot seed is called a seed coat. The seed coat has two layers, the outer layer is known as testa, and the internal layer is tegmen. 
  • The scar present on the seed coat is called hilum through which the developing seeds are connected to the fruit. 
  • The small pore present above the hilum is called the micropyle
  • The embryo is enclosed by the seed coat which consists of two cotyledons attached to the primary axis. There are two rudimentary leaves present on the terminal ends in between the cotyledons. One is Plumule which is present on the terminal and the other one is the radicle on the other side of the embryonal axis. 
  • The root is formed from the radicle and the plumule forms the shoot. The region between plumule and micropyle is known as epicotyl and the region between the radicle and micropyle is called the hypocotyl.

In plants like beans, gram, and pea, the endosperm is absent in mature seeds and such seeds are called non-endosperms. Peas, almonds, and cashews are instances of dicotyledons or dicot seeds.

 

Structure Of A Dicotyledonous Seed

The study of the physical and external structure of plants is known as the morphology of plants. The morphology of flowering plants includes leaves, roots, stems, flowers, and fruits. Flowering plants are also known as angiosperms. The anatomy of flowering plants includes the organization of cells and tissues within the bodies of flowering plants. Tissues are formed by a group of cells to perform a function. Flowers are known as the reproductive part of the plant since they play the main role in the process of reproduction. 

The flowering plant has two systems which are underground root growth and shoot system. The underground part is known as the root while the above one is named the shoot. 

 

Roots-The root is a brown, non-green, and underground piece of a plant. Parts of the root include the primary root, lateral roots, the apical meristem, a root cap, and root hairs. The root system of the plants is of 3 types, which are the Taproot system, Fibrous root system, and Adventitious root system.

Shoot-The stem is the ascending part of the axis bearing branches, leaves, flowers and fruits. It develops from the plumule of the embryo of a germinating seed. The shoot system grows above the ground where it assimilates the light required for photosynthesis. The stem consists of nodes and internodes. The district of the stem where leaves are grown is called nodes segments between two nodes are called internodes. The stem bears buds, which might be terminal or axillary.  

Leaves-The leaf is a horizontally borne structure and generally straightened. It is a really photosynthetic piece of the plants. It retains a light and helps in the trading of gases through the stomata. Depending on the pattern of leaf edge, leaves can be additionally characterized into simple and compound leaves. In the simple leaves, the lamina is entire and the lamina does not touch the midrib when incised. In compound leaves, the incisions of the lamina reach up to the midrib breaking it into a number of leaflets. 

Flowers-The flowers are the regenerative part of the plant. A flower is a changed shoot wherein the shoot apical meristem changes to flower meristem. The organization of flowers on the floral axis is called inflorescence which has two significant parts called racemose which let the fundamental node proceed to develop and cymose which ends the primary node in a stream.

Fruits-Fruit is a main element of the flowering plant. It is a full-grown or on the other hand aged ovary, created after fertilization. On the off chance that fruit is shaped without preparation of the ovary, it is known as a parthenocarpic.

The fruit comprises a wall or pericarp and seeds. The pericarp might be dry or meaty. At the point when the pericarp is thick and meaty, it is separated into the external epicarp, the center mesocarp, and the internal endocarp.

Seeds-After fertilization, the ovules develop into seeds that are enclosed in the fruit. These are vital elements in the flowering plant. A seed is comprised of a seed coat and an embryo. The embryo is comprised of a radicle, an embryonal axis, and one or two cotyledons. Depending on the number of cotyledons present in the seeds, they can be classified as monocotyledonous seeds and dicotyledonous seeds.

  • Monocot seeds: In this type of seed, the embryo comprises of embryonal axis and only one cotyledon. Examples include palm trees and onions.
  • Dicot seeds: In this type of seed, the embryo comprises of embryonal axis and two cotyledons. Examples include pea and beans.

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Dicotyledons seeds

The embryo present in the dicotyledon seed consists of an embryonal axis and two cotyledons. The cotyledons are fleshy, and they are photosynthetic and serve as food reserves for the developing embryo.  The cotyledons are photosynthetic and can produce food for the growing embryo. The outer layer of the dicot seed is called a seed coat. The seed coat has two layers, the outer layer is known as testa, and the internal layer is tegmen.  The scar present on the seed coat is called hilum through which the developing seeds are connected to the fruit.  The small pore present above the hilum is called the micropyle.  The embryo is enclosed by the seed coat which consists of two cotyledons attached to the primary axis. There are two rudimentary leaves present on the terminal ends in between the cotyledons. One is Plumule which is present on the terminal and the other one is the radicle on the other side of the embryonal axis.  The root is formed from the radicle and the plumule forms the shoot. The region between plumule and micropyle is known as epicotyl and the region between the radicle and micropyle is called the hypocotyl....

FAQs on Dicot Seeds

Question 1: What are the differences between Monocot and dicot seeds?...