Mesocarp

Introduction

The mesocarp or pulp fraction, which is commercialised as “Mesquite flour” by some companies, contains the majority of the sugars, organic acids, and volatiles responsible for flavour and aroma, as well as proteins and polyphenolics with nutritional value. Because commercial milling processes do not completely separate the pulp from the fibrous covering that surrounds the seed, insoluble fibre ends up in mesocarp flour, which is beneficial in human diets. The sugar is primarily sucrose, which can account for up to 50% of the sugar in this fraction  and in moist, unheated flour, it can be converted enzymatically to glucose and fructose (Becker & Grosjean, 1980). The mesocarp fraction contains citric, malic, shikimic, and fumaric acids, with citric being by far the most abundant.

Mesocarp explanation

The mesocarp is made up of parenchymal cells with diameters ranging from 50 to 300 mm, each surrounded by a rigid cell wall. Sugars, acids, polyphenols, water-soluble colour substances, inorganic compounds, and oil droplets are all found in these cells. The majority of the oil is found in the flesh of the olive (95 percent ). Oil droplets are primarily triacylglycerols (TAGs) with a high concentration of oleic acid and minor amounts of linoleic, palmitic, stearic, and linolenic acids. 

The high content of polyphenols, particularly oleuropein, is a distinguishing feature of olive flesh. Green ripe olive flesh has a total polyphenol content of 2% (fresh weight), while black ripe olive flesh has a total polyphenol content of 1%. Fresh olive flesh contains a variety of vitamins, including carotenes, a precursor to vitamin A; vitamin C; thiamine; and tocopherols, a precursor to vitamin E.

What does the epicarp, mesocarp and endocarp become in the fruit?

Berries are simple, succulent true fruits with a fleshy, edible pericarp (includes epicarp, mesocarp, endocarp). Except for the seed, no part of a berry is hard or inedible.

Pomes are a type of false fruit with the fleshy part being the thalamus.

Drupe is a succulent fruit with a thin epicarp, fleshy mesocarp, and stony hard endocarp.

Synconus is a composite fruit that grows from an inflorescence and consists of several achene fruitlets clustered together. In this fruit, the receptacle of the female flowers becomes fleshy.

Early growth and development of mesocarp

During the first 12 weeks after full bloom, we studied the growth and development of the ‘Manzanilla’ olive fruit mesocarp in transverse equatorial sections (AFB). Sequential sampling and quantitative data provided an integrated view of this tissue’s formation. The mesocarp, or fruit flesh, was formed by parenchyma cells that were relatively isodiametric and contained a small number of isolated sclereids. By four weeks AFB, a cell size gradient resembling mature olive fruits had emerged. Biweekly cell size and number measurements revealed that, as in other drupes, both cell division and expansion contribute to initial mesocarp growth.

What is pericarp?

The pericarp (fruit coat) encircles the entire seed and is divided into two parts: the outer pericarp and the inner pericarp. The outer pericarp is made up of three layers: the epidermis (epicarp), the hypodermis, and the remnants of thin-walled cells. A natural plane of cleavage is formed by these thin-walled cells with a discontinuous cellular structure. The removal of the outer pericarp, known as beeswing by millers, also aids water movement into the kernel. The inner pericarp adjacent to the remnants is made up of intermediate cells, which are made up of a single layer of cross cells and tube cells. The cross cells are long and cylindrical (approximately 125 20 m), with a long axis perpendicular to the grain’s long axis.

What is fruit anatomy?

Fruit anatomy is the study of the internal structure of fruit in plants. The mature ovary or ovaries of one or more flowers are called fruits. They are classified into three anatomical groups: aggregate fruits, multiple fruits, and simple fruits. Aggregate fruits are made up of many ovaries or fruitlets and are formed from a single compound flower.

Raspberries and blackberries are two examples. The fused ovaries of multiple flowers or inflorescences form multiple fruits. Some examples are fig, mulberry, and pineapple.

Simple fruits are produced by a single ovary and can contain one or more seeds. They can be both fleshy and dry. During the development of fleshy fruit, the pericarp (ovary wall) and other accessory structures become the fleshy portion of the fruit.Berries, pomes, and drupes are examples of fleshy fruits. 

Simple fruits are produced by a single ovary and can contain one or more seeds. They can be both fleshy and dry. During the development of fleshy fruit, the pericarp (ovary wall) and other accessory structures become the fleshy portion of the fruit. Berries, pomes, and drupes are examples of fleshy fruits.

Conclusion

The mesocarp or pulp fraction, which is commercialised as “Mesquite flour” by some companies, contains the majority of the sugars, organic acids, and volatiles responsible for flavour and aroma, as well as proteins and polyphenolics with nutritional value. The majority of the oil is found in the flesh of the olive. Pomes are a type of false fruit with the fleshy part being the thalamus. The pericarp encircles the entire seed and is divided into two parts: the outer pericarp and the inner pericarp. The outer pericarp is made up of three layers: the epidermis , the hypodermis, and the remnants of thin-walled cells.