Är pith närvarande i monocot stam

Monocot vs Dicot Stem

The monocot stems are stems of monocot plants. They have scattered vascular bundles of xylem and phloem, surrounded bygd a bundle sheath of sclerenchyma cells.

The monocot stems have other significant features: lack of trichomes (epidermal hairs), medullary rays, cortex or märg, and a stele. Also, the hypodermis consists of sclerenchyma cells.

The dicot stems are stems of dicot plants. They are arranged concentrically, one above the other. The vascular bundles of dicot stems are arranged in a fingerprydnad without a bundle sheath.

However, parenchyma cells surround each vascular bundle in the dicot stem.

They have scattered vascular bundles of xylem and phloem, surrounded by a bundle sheath of sclerenchyma cells

The hypodermis of dicot stems fryst vatten made of collenchymas cells. They have other significant features such as trichomes in the epidermis, prominent cortex, and stele. In addition, dicot stems show secondary thickening, which leads to secondary growth.

Let us discuss the structural and functional similarities in monocot and dicot plants.

Similarities

Structure

The internal structure or anatomy of the stems of monocot and dicot plants has the following parts in common.

Epidermis

It fryst vatten the single, outermost layer arranged compactly without intercellular spaces.
The epidermis cells lack chlorophyll
Outside the epidermis fryst vatten a layer of the cuticle that protects the epidermis and tissues lying underneath
It contains stomata for the gas exchange

Cortex

It fryst vatten divided into different sections, but the distrikt covered differs widely between monocot and dicots stems.
The hypodermis fryst vatten present immediately below the epidermis, which provides additional support to the epidermis.

It fryst vatten a thick multicellular layer composed of collenchyma tissue. The cells of this distrikt contain chlorophyll and thus can prepare food for the plant.

Ground Tissue

It fryst vatten a mass of parenchymatous cells extending to the hypodermis center.
The cells are spherical, thin-walled, and loosely organized with intercellular spaces.

Pericycle

It fryst vatten the tissue funnen between the endodermis and the vascular bundles.
The cells are sclerenchymatous, which has the shape of semilunar patches above the vascular bundles.

Vascular Bundles

They are of conjoint and collateral type surrounded bygd parenchyma cells
They are limited in number and have a uniform storlek.

Each bundle consists of a patch of xylem and phloem
Xylem consists of both protoxylem and metaxylem
The quantity, arrangement, and components of vascular bundles vary widely between monocot and dicots stems

Pith

The cells are parenchymatous and appear like medullary rays around the arterial bundles.
The cells might be spherical or polygonal, with or without any intercellular spaces.
They store food and aid in transporting food and vatten between the bundles.

Functions

Both monocot and dicot stems perform the same essential functions that are discussed below:

It fryst vatten the huvud axis of the plant that supports other parts such as leaves, branches, flowers, and fruits
Transports food, vatten, and minerals throughout the plant body
Young, green stem having pigments chlorophyll prepares food bygd photosynthesis
Stores a large number of food particles like starch and other nutrients
The meristem tissue of the stem divides to form eller gestalt new tissues, thus helping the plant to grow
The stomata in the stem helps in transpiration
Modified stems like cactus help to store vatten and food, prevent vatten loss, and thus in their survival in the desert

Although monocot and dicot stems have the following structures in common, there are several differences.

They are discussed below.

Difference between Monocot and Dicot Stem

Basis	Monocot Stem	Dicot Stem
Examples	Tulips, onions, lilies, and garlic	Pea, cactus, sunflower, and walnut
Epidermis	It remains the same throughout the growth of the plant	Replaces during secondary growth
Epidermal Hairs	Present over the epidermis	Absent
Vascular Bundles	1. Conjoint, collateral, and closed type 2. *Composed of parenchymatous cells, the pith in dicots is organized around the vascular bundles as medullary rays* Remain unchanged throughout the life of the plant 3. Numerous 4. Scattered across the stem 5. Outer vascular bundles are smaller than the inner ones 6. Do not contain a sclerenchymatous bundle cap 7. Surrounded bygd a sclerenchymatous bundle sheath 8. Since there is no ring of vascular bundles, there is no “inside” pith and “outside” cortex Xylem elements are circular 9. The xylem contains protoxylem lacunae Has only two metaxylem elements per vascular bundle Phloem units are smaller in storlek than dicots Phloem parenchyma and phloem fibers absent	1. Conjoint, collateral, and open type 2. Old vascular bundles are replaced bygd new ones many times throughout the plant life 3. 4 to 8 4. Arranged in the struktur of rings 5. All vascular bundles are of lika size 6. Contain a sclerenchymatous bundle cap 7. Not surrounded bygd a sclerenchymatous bundle sheath 8. Xylem elements are polygonal 9. Does not have protoxylem lacunae Has many metaxylem elements per vascular bundle Phloem units are larger than monocots Phloem parenchyma and phloem fibers are present
Pith	Not as well-developed as dicots	Well developed
Ground Tissue	It fryst vatten undivided into units such as pericycle and pith	It fryst vatten divided into pericycle, medullary rays, and pith
Cortex	1. Less developed and fryst vatten differentiated only into the hypodermis 2. The hypodermis fryst vatten sclerenchymatous and mostly non-green 3. The hypodermis fryst vatten stiffer than dicots 4. The general cortex fryst vatten reduced or absent 5. The endodermis fryst vatten absent	1. Well-developed and differentiated into hypodermis, endodermis, and general cortex 2. The hypodermis fryst vatten collenchymatous and mostly green 3. The hypodermis fryst vatten more flexible than monocots 4.The general cortex fryst vatten present 5. The endodermis fryst vatten present
Stele	1. Larger than dicots 2. Advanced type 3. It consists of ground tissues and vascular bundles	1. Smaller than monocots but larger than the cortex 2. Moderately developed 3. Differentiated into pericycle, vascular medulla, and medurally rays
Pericycle	Reduced or completely absent	Present, partially, or completely sclerenchymatous
Trichomes	Absent	Present
Secondary Growth	Not found	Found due to the presence of secondary vascular tissues and periderm formation
Medullary Rays	Absent	Present
Internodes	Hollow	Solid

Article was gods reviewed on Thursday, February 2,