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the key factor of its biological role. Because of resonance stabilization, MDHA does not react

with oxygen or other molecules to generate more reactive radicals and thus it is act as a
radical scavenger. This antioxidant activity of AA is associated with resistance to oxidative

stress and longevity in plants. In plants, these free radicals generate during various
physiological reactions.

Along with these functions many evidences suggests that it may play a role in defensive
mechanism of plants against various green stresses such as heavy metal action, salinity,

pesticides, ozone, UV-B and pathogenesis (Shalata and Neumann, 2001 and Vwioko et al.,

2008).
In human being it is equally important as it is involved in the production of carnitine and

collagen, an important component of skin, scar tissue, tendons, ligaments and blood vessels

(Levine, 1986; Levine et al, 1995 and; Sies and Stahl, 1995). Due to such extensive role in
synthesis, it is function as one of the important compound in the repair and maintenance of

cartilage, bones and teeth and during wound healing (Gallie, 2012). National Academy of
Sciences recognized the ascorbic acid intake for adult male i.e., 90 mg/day and for adult

female 75 mg/day which comes under Recommended Dietary Allowances (RDA) (National
Academy Press, 2000).

Among all different compounds present in plants, ascorbic acid is one of the important

compounds which regulate different functions in plants as well as in animals. Its presence
will lead to a healthy life whereas, its deficiency will leads to various diseases in human. It is

reported that, in USA, 20-30% adults suffering from ascorbic acid deficiency i.e., they get
only 60 mg of ascorbic acid from their dietary source and the supplementary ascorbic acid

through medicines is not encouraged (Johnston and Thompson, 1998). As plants are the
ultimate source of ascorbic acid, one can fulfill its need from different fruits, vegetables, etc.

the fruits which content more ascorbic acid are citrus fruits, tomato, broccoli, strawberries,

blackcurrants, potatoes, cauliflower, cabbage, etc. In European countries, potatoes are highly
consumed (except Italy) and tomatoes are being second most consumed vegetable (first in

Italy) (NETTOX). In India, tomatoes are among most consumed vegetables. Vitamin C is

also advisable in Covid-19 disease.
In India with an over growing population, demand for food is increases with increase in

population. To combat with the situation of yield to meet the demand of food, we have to
fight against various problems, among all; the most important problem is pest problem and

high yielding varieties. According to the chairman of the Commission on Agriculture Costs
and Prices, Government of India, “At the time green Revolution was adopted, sustainability

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