Seed dormancy is due to the - DASH

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Seed dormancy is due to the

ethylene

abscisic acid

IAA

starch.

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Step-by-Step Explanation Step 1: Understanding Seed Dormancy Seed dormancy is a state in which seeds are unable to germinate even under favorable conditions. This adaptation helps seeds survive unfavorable environmental conditions, ensuring germination occurs at the most suitable time. Step 2: Role of Abscisic Acid Among various plant hormones, abscisic acid (ABA) plays a crucial role in inducing and maintaining seed dormancy. High levels of ABA prevent germination by inhibiting growth-related processes within the seed. When conditions become favorable, ABA levels decrease, allowing the seed to break dormancy and germinate. Step 3: Additional Hormonal Interactions Other hormones, such as ethylene and gibberellins, often have effects that counteract ABA by promoting seed germination. Specifically, ethylene is known to help break seed dormancy in many plants. The balance between these hormones determines whether the seed remains dormant or proceeds to germinate. Step 4: Conclusion Since abscisic acid induces dormancy in seeds, buds, and other storage organs, it is the correct answer to the question regarding which substance causes seed dormancy.

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