Question
Biology Question on plant growth and development
The gaseous plant growth regulator is used in plants to:
A
Seed up the malting process
B
Promote root growth and root hair formation to increase the absorption surface
C
Help overcome apical dominance
D
Kill dicotyledonous weeds in the fields
Answer
Promote root growth and root hair formation to increase the absorption surface
Explanation
Solution
- Ethylene is a gaseous phytohormone that plays a role in regulating both growth and senescence in plants.
- It is primarily produced in significant quantities by tissues undergoing senescence, as well as ripening fruits.
- The hormone has the ability to promote or inhibit growth and senescence processes within plants, and can also have specific effects such as inhibiting lateral buds, causing apical dominance, and promoting femaleness in certain plants like Pineapple and Cucumber.
- Additionally, ethylene has been shown to increase the number of female flowers in cucumber plants, leading to a higher final yield.
- Furthermore, it can increase the absorption surface area of the root by promoting both root growth and root hair formation.