Gibberellins are a group of plant hormones that play a role in various growth and developmental processes in plants. They are classified into two main categories: exogenous gibberellins and endogenous gibberellins.
Exogenous gibberellins are gibberellins that are applied externally to plants. They can be in the form of synthetic gibberellins or naturally occurring ones extracted from other plant species. When exogenous gibberellins are applied to plants, they can promote various growth processes such as stem elongation, seed germination, and flowering. Farmers and horticulturists often use exogenous gibberellins to manipulate plant growth and development, for example, to stimulate the growth of tall and slender crops or to induce seed germination in certain plant species.
Endogenous gibberellins, on the other hand, are gibberellins that are naturally produced within the plant. These hormones are synthesized in various parts of the plant, including the shoot tips, young leaves, and seeds. Endogenous gibberellins play a vital role in regulating plant growth and development. They are involved in processes such as cell elongation, cell division, and the transition from vegetative to reproductive growth. The levels of endogenous gibberellins in a plant can be regulated by various internal and external factors, such as light, temperature, and nutrient availability.
In summary, exogenous gibberellins are applied externally to plants, while endogenous gibberellins are naturally produced within the plant. Both types of gibberellins play important roles in regulating plant growth and development.
exogenous and endogenous gibberellin
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