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Question
In germinating seeds, amylase, proteases, lipases are stimulated by ..............
In germinating seeds, amylase, proteases, lipases are stimulated by ..............
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Solution
The correct option is B Gibberellin
Gibberellins are involved in seed germination in certain plants. They induce hydrolytic enzymes. Their effect on seed germination, however, is species specific. In a classic experiment involving barley seed germination, researchers showed that the release of gibberellin from the embryo triggers the synthesis of alpha-amylase, an enzyme that digests starch in the endosperm. As a result, glucose becomes available for absorption by the embryo. Although enzymes mobilize starch reserves in many types of seeds, gibberellin control of seed enzymes appears restricted to cereals and other grasses. In addition to mobilizing food reserves in newly germinated grass seeds, application of gibberellins substitutes for low-temperature or light requirements for germination in seeds of plants such as lettuce, oats, and tobacco.
Gibberellins are involved in seed germination in certain plants. They induce hydrolytic enzymes. Their effect on seed germination, however, is species specific. In a classic experiment involving barley seed germination, researchers showed that the release of gibberellin from the embryo triggers the synthesis of alpha-amylase, an enzyme that digests starch in the endosperm. As a result, glucose becomes available for absorption by the embryo. Although enzymes mobilize starch reserves in many types of seeds, gibberellin control of seed enzymes appears restricted to cereals and other grasses. In addition to mobilizing food reserves in newly germinated grass seeds, application of gibberellins substitutes for low-temperature or light requirements for germination in seeds of plants such as lettuce, oats, and tobacco.
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