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The PGRs which play an important role in...

The PGRs which play an important role in plant responses to wound and stresses of biotic and abiotic origin and also involved in various growth inhibiting activities such as dormancy and abscission, is/are 

A

ABA

B

Ethylene

C

Auxin, cytokinin and GA

D

ABA and ethylene

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The correct Answer is:
D
The PGRS which play an important role in plant responses to wound and stresses of biotic and abiotic origin and also involved in various growth inhibiting activities such as dormancy and abscission, are ABA and ethylene.
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A2Z-PLANT GROWTH AND DEVELOPMENT-Section A : Topicwise Questions Topic 3 : Plant Growth Regulators (characteristics And The Discovery
  1. The PGRs can be broadly divided into two groups based on their functio...

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  2. Which of the following PGRs are categorised as plant growth promoters?

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  3. The PGRs which play an important role in plant responses to wound and ...

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  4. The PGR, ethylene, could fit either the groups-plant growth promoters ...

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  5. The following experiment demonstrate that the

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  6. The discovery of each of the five major groups of PGRs (auxin, GA, cyt...

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  7. Who confirmed the release of a volatile substance from ripening orange...

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  8. Who observed that the coleoptiles of canary grass responded to unilate...

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  9. Auxin was isolated from tips of coleoptiles of

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  10. Who reported the appearance of symptoms of the Bakane disease in uninf...

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  11. In the above observation, the active substances were later identified ...

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  12. Cytokinesis promoting active substance is called kinetin which is iden...

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  13. Who observed that from the internodal segments of tobacco stems the ca...

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  14. During mid-l960s, three independent researchers reported the purificat...

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  15. Bending of stem/coleoptile towards light or shoot of potted plant plac...

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  16. Who first suggested presence of growth regulatory chemicals in plants ...

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  17. Plant grwoth hormones extracted from a fungus and a fish are respectiv...

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  18. Which one of the following is a natural growth inhibitor ?

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  19. Bakane disease of Rice is due to

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  20. Bakane disease leads to the discovery of which phytohormone (PGR)

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