NCERT Solution for Class 10 Science Chapter 7
Control and Coordination
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-122
Questions No-1
What are plant hormones ?
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NCERT Solution for Class 10 Science Chapter 7
Control and Coordination
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Intext Questions
Page No-122
Questions No-1
Plant hormones or phytohormones arenaturally-occurring organic substances. These are synthesized in one part of the plant body (in minute quantities) and are translocated to other parts when required. The five major types of phytohormones are auxins, gibberellins, cytokinins, abscisic acid and ethylene.
• Gibberellins help in the growth of the stem.
• Auxins help in the growth of the stem.
• Cytokinins promote cell division.
• Abscisic acid is one example of a hormone which inhibits growth.
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Plant hormones or phytohormones are chemicals which help to regulate growth, development, differentiation, flowering and other physiological processes with or without being translocated to other sites.