Pre- and postharvest application of calcium may delay senescence in fruits with no detrimental effect on consumer acceptance (Lester & Grusak,2004). Exogenously applied calcium stabilizes the plant cell wall and protects it from cell wall degrading enzymes (White & Broadley, 2003). Studies have shown that the rate of senescence often depends on the calcium status of the tissue and by increasing calcium levels, various parameters of senescence such as respiration, protein, chlorophyll content
and membrane fluidity are altered (Poovaiah,1986)