Senescence and abscission both are genetically controlled
phenomenon yet reports of environmental, nutritional and chemical
controls are not unknown.Gibberellic acid play vital role in
controlling of senescence and abscission. Gibberellic acid delay
the senescence by delay the synthesis of hydrolytic enzymes.Recent
studies show that Gibberellic acid control the genetical
characters. Hydrolytic enzymes promote the degradation of not only
macromolecules like starch, proteins, lipids, nucleic acid etc.,
but also degrade the cell organelle like chloroplast, mitochondria,
nucleus etc., Chloroplast is the first cell organelle affected by
the activity of hydrolytic enzymes. It is also proved by the
yellowing of the leaves. The untreated leaves show yellowing
earlier as compared to the gibberellic acid
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