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What is meant by bioassay ? Name any two...

What is meant by bioassay ? Name any two bioassays for auxins.

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(i) Bioassay: It is a technique to test the growth response of a plant or its part to a growth regulator.
(ii) Auxin activity in the plants can be tested by two bioassays : Avena curvature test and root growth inhibition test.
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MODERN PUBLICATION-PLANT GROWTH AND DEVELOPMENT-REVISION EXERCISES (Short Answer Questions )
  1. Which among the following is a long day plant ? Why is it so called ? ...

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  2. Write the full forms of two synthetic auxins NAA and IBA. What for are...

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  3. What induces ethylene formation in plants? Give two different actions ...

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  4. What is the effect of each of the following on germination of seeds: ...

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  5. Differentiate between quiescence and dormancy with reference to seed g...

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  6. What is meant by bioassay ? Name any two bioassays for auxins.

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  7. Name the hormone that acts as an antagonistic to ABA. From which micro...

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  8. What is meant by abscission? Name the phytohormone involved in it.

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  9. List the four ways how the use of auxins may help in obtaining better ...

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  10. Write any four agricultural applications of ethylene.

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  11. Name the only gaseous natural plant hormone.

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  12. What is differentiation?

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  13. Define plasticity

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  14. Which parts of plant produce cytokinins?

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  15. What is sigmoid growth curve ?

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  16. Why ABA is called stress hormone in plants?

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  17. What do you mean by apical dominance? Which hormone controls it?

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  18. Give a brief account of photoperiodism.

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  19. Where are auxins generally produced in a plant? Name any one naturally...

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  20. What is photoperiodism and vernalisation? Describe their significance.

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