A PRESENTATION ON

GROSS FEATURES AND MINUTE STRUCTURE OF

Presented by Md. Norul Bashar

Tamarindus indica

Gross features:Gross feature is the out look of a tree.Actually gross features are the properties of a wood that can be determined without microscope or magnifier.Gross features are in general two kinds-

1. Gross structure feature2. Gross physical feature

Gross structure features:

a. Growth incrementb. Early wood and late wood c. Sap wood and heart wood

Gross physical feature:ColourLusterOdorTasteTextureWeightHardnessGrainFigure

Gross physical features:

a. Colourb. Lusterc. Odord. Tastee. Texturef. Weightg. Hardnessh. Graini. Figure

Gross Features

Colour : Wood is yellowish white but central portion is chocolate in colour .

Luster : Luster is the ability of a wood to reflect light.It is a lustrous wood.

Odor : Wood is odorless.Odor generally become fade with time.

Taste : It has no taste.

.

Texture : Texture is medium fine.

Grain : Curly grain wood.

Weight : Heavy wood. Green wood 881kg/m³ dry 753kg/m³

Hardness : Harness is also related with weight.Generally heavier woods become harder.

Figure : Figure is the ornamental marking or design on the longitudinal surface of wood.

Gross features

Figure: Three Section Of Tamarindus indica

Minute Structure

Vessel Element : Actually vessel elements are pores when viewed on the cross section of a wood.The cross section of a Tamarindus indica is diffuse porous Some pore fill with gummy deposits or tyloses.There are two kinds of vessel elements.

1. Ring porous2. Diffuse porous

1 . Vessel Element2 . Fibers3 . Parenchyma

Figure: Diffuse porous

Fibers : Fibers are polygonal in cross section,very thick walled,not arranged in radial tiers. There are two kinds of fibers.

1. Fiber Tracheids2. Libriform fibers.

Fiber Tracheids : Fiber Tracheids are generally relatively thick walled fibrous cells with pointed ends border pits.

Libriform fibers : Libriform fibers differ from fiber Tracheids in possessing simple pit.

Minute Structure

Parenchyma :

Parenchyma are composed of more or less isodiametric cells.There are two kinds of parenchyma.

1. Strand parenchyma2. Ray parenchyma

Parenchyma of Tamarindus indica is strand 2-4 cells mostly 3.

Minute Structure

Uses of Tentul

Fruit

Medicine

Religious Uses

Furniture

Ornamental

References:

Anatomical Features of 42 lesser used or unused wood Wood species of Bangladesh. Bulletin No.14

 Morton, Julia F. (1987). Fruits of Warm Climates. Wipf and Stock Publishers.

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