Abscisic acid, or ABA, is a plant hormone that helps regulate processes such as leaf and root growth, dormancy, and stress responses. It plays an essential role in helping the plant survive unfavourable conditions such as drought and extreme temperatures by promoting dormancy. With its definition being “a naturally occurring acid that affects the opening and closing of stomata in some types of plants”, abscisic acid has a significant effect on reducing water loss from the leaves. This allows for conservation of water when it is scarce or not available which enables plants to survive difficult environmental circumstances. Without this hormone, many plants would not be able to survive without extended periods of moisture or water availability.
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