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In the absence of light,  bound 11-cis-retinal locks the rhodopsin into its inactive (R) conformation

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Economically important plants

Cereals

Wheat-King of cereal crop

Family: poaceae (gramineae)

Botanical name:triticum aestivum

Cereals

Rice-“Dhan“

Family: poaceae (Gramineae)

Botanical Name: Oryza sativa

Uses

It is used in making alcoholic beverages.

Rice bran served as cattle food.

Paddy straw is used for making hats, ropes and baskets etc.

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Indian rubber tree (ficus elastica) 

Family: poaceae (gramineae)

Plant part used- milky latex


Cassava or ceara rubber tree (manihot glaziovii)

Family: Euphorbiaceae (spurge family)

Plant part used-  Latex

Also known as Manihot carthaginensis

Panama rubber tree (castilla elastica) 

Family: moraceae

Plant part used- latex

Para rubber tree (hevea brasiliensis)

Family:Euphorbiaceae (spurge family)

Plant part used- Milkylatex

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JUTE

Jute-"Corchorus species“

Family:malvaceae

Botanical Name: corchorus olitorius

Plant part used as fiber-stem

Uses

Jute fibre is renewable natural fibre.

It is eco-friendly as its components (cellulose and lignin) is 100% bio-degradable.

Jute fibers are used for making various fabrics for bagging, packaging and wrapping textiles



Uses
Fibers are also used for making rope, twine and matting, and decorative fabrics, woven carpets, curtain, linoleum and oil cloth.
It is also utilized as geotextile fabric.
Used as a remedy for dysentry.
It is also mixed with silk or used for imitating silk fabrics

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Tea

Botanical name- camellia sinensis

Family-Theaceae

Uses of tea

It contains vitamin B complex, nicotinic acid etc.

It is helpful in asthma due to the presence of Theophylline.

It is used as astringent and stimulant, diuretic, nervine, etc.

It has antimicrobial, anti-inflammatory and antioxidant property

Coffee

Botanical name-coffea arabica

Family-rubiaceae

Uses of coffee

It is a stimulating beverage with pleasant aroma.

It is blended with dried roasted root powder of chicory to flavor ice- creams, candies, cookies and pastries etc.

It is used as CNS stimulant.

The coffee pulp is used as cattle feed.

The wood of coffee tree is used to make boxes

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Cotton

Botanical name- gossypium spp.

Family- malvaceae

Plant part used- surface fibers on seeds

Uses of cotton

The fiber of cotton plant is used for in textile industry for making clothes, tyre cord fabrics, threads, cordage, twine etc.

The fiber is used for stuffing cushions, pillows and mattresses etc.

The cotton seeds are rich in proteins and vitamin B.

The cotton seed is also used for dairy cattle due to presence of high level of fiber

Uses of cotton

The cotton seed also contains medicinal properties. It is used in the treatment of dysentery, and intermittent fever.

Cotton seed produces a low-grade oil which is used as lubricants.

It is used in soap industry.

Oil cake obtained from Gossypium is an excellent fertilizer.

Sunn hemp

Botanical name- crotalariajuncea    

Family-fabaceae

Plant part used- stem bast fibers


Uses of sunn hemp

The plant fiber is used in making cordage fiber, ropes, twines, cords, etc.

Fiber of the plant is used as raw material for the making of tissue papers and currency papers.

It is used for making fishing net as it doesn't get destroyed in water.

The stalk and leaves of the plant are used as fodder for cattle

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Ground nut oil

Botanical name-arachis hypogaea

Family-fabaceae

Uses of ground nut oil 

Ground nut oil is used in cooking food.

Ground nut oil is also used in soap making, leather dressing, shaving creams, candles etc.

Groundnut cake is used as cattle feed and fertilizer as it's rich in Nitrogen

Uses of ground nut oil 

Oil is used in preparation of ointments, plasters etc.

Oil is also used for preparing concentrated solutions of vitamin A, D, B1 and B2.

A synthetic fiber known as "Ardil" is obtained from peanuts which can be woven like wool and is used in textile industry

Coconut oil

Botanical name- cocos nucifera

Family- arecaceae

Plant Part Used-dried meaty endosperm of coconut

Uses of coconut oil

The coconut oil is used for both edible and industrial purposes.

Coconut oil is used in cooking food, especially in South India.

The coconut oil is used in making hair oil, shampoos, liquid soaps.

The coconut oil is an important constituent in making shaving cream face creams and other cosmetic products

Uses of coconut oil

The oil cake is used as cattle feed.

It is used for manufacture of synthetic detergents.

It is used in making safety glasses for airplanes, motor cars and production of plasticizers.

It is used to make coir fiber

Sesame oil

Botanical name- sesamum indicum

Family-  Pedaliaceae

Plant Part Used-seeds

Uses of Sesame oil

It is used as salad oil or cooking oil.

It is used in the manufacture of soaps, pharmaceuticals and lubricants.

It is used as an ingredient in cosmetics, perfumes etc.

It has antioxidant, antimicrobial and anti-inflammatory properties

Uses of Sesame oil

It contains several essential fatty acids like oleic acid, palmitic acid, stearic acid and linoleic acids which are very effective in moisturizing the skin and making it soft and hydrated.

The sesame oil helps in cure of premature greying of hair.

It is helpful in improving oral health by oil pulling.

It is helpful in fighting stress and depression.

Mustard oil

Botanical name-brassica campestris

Family-brassicaceae

Plant Part Used- oil seed

Uses of mustard oil

Uses of mustard oil

It is used as massage oil for body and hair.

It is also used for making soaps, grease, synthetic rubber and plastic.

The oil cake is a good cattle feed.

The by-product of mustard is also used as manure

Castor oil

Botanical name- ricinus communis

Family-euphorbiaceae


Uses of castor oil
It is a fatty oil, used as a lubricants
Castor oil has anti-inflammatory, antioxidant, antifungal, and pain-relieving properties
It can help relieve constipation, moisturize skin, it is widely used as a soap manufacturing, inks, plastics, paints, varnishes, leather preservation etc.
Oil cake is poisonous and can't be used as a cattle feed. However, it is an excellent fertilizer