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Why is Abscisic acid also known …

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Why is Abscisic acid also known as stress hormone?
  • 2 answers

Ashutosh Gupta 4 years, 1 month ago

Because it promote dormancy and help in abscission of fruit and leaves

Meghna Thapar 4 years, 1 month ago

Abscisic acid acts as a general plant growth inhibitor and an inhibitor of plant metabolism. ABA inhibits seed germination. ABA stimulates the closure of stomata in the epidermis and increases the tolerance of plants to various kinds of stresses. Therefore, it is also called the stress hormone. Abscisic acid is called stress hormones as it induces various responses in plants against stress conditions.

It increases the tolerance of plants toward various stresses. It induces the closure of the stomata during water stress. It promotes seed dormancy and ensures seed germination during favourable conditions. It helps seeds withstand desiccation. It also helps in inducing dormancy in plants at the end of the growing season and promotes abscission of leaves, fruits, and flowers.

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