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Plant Growth and Development

Short Answer Type

31. What do you mean by long day plants?

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32. What is 'bakane'?

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33. What is quiescence ?

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34. Why seeds sown very deep fail to emerge?

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35. What is dormancy ?

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36. List any two inhibitory functions of auxins.

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37. What is efficiency index ?

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38. How will you induce lateral branching in a plant, which normally does not produce them ? Give reason in support of your answer.

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39. In most plants the terminal bud suppresses the development of lateral buds. What is this phenomenon called ? Name the phytohormone that can promote the phenomenon.

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40. Would you expect soyabean plants to flower, if given a daily exposure of 15 hours ? Give reasons

Soyabean plants are short day plants which initiate flowering when the day length becomes shorter than a critical length. They remain vegetative if day length is in excess of the critical duration of light. Therefore, soyabean plants will not flower if given a daily exposure of 15 hours.

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