- 1 Which of the following plant hormone is responsible for seed germination?
- 1.1 What are Auxins?
- 1.2 What are the functions of Auxins?
- 1.3 What are Gibberellins?
- 1.4 What are the functions of Gibberellins?
- 1.5 What is Ethylene?
- 1.6 What is the function of Ethylene?
- 1.7 What is Abscisic Acid?
- 1.8 What is the function of Abscisic Acid?
- 1.9 Plant Growth and Development MCQs and Answers –Set-1
- 1.10 Plant Growth and Development NEET MCQ –Set-2
- 1.11 Important Questions on Plant Growth and Development –Set-3
- 1.12 Plant Growth and Development NEET Questions –Set-4
- 1.13 Plant Growth and Development Short Questions for NEET –Set-5
- 1.14 Plant Growth and Development Class 11 questions and answers –Set-6
- 1.15 Plant Growth and Development objective questions and Answers –Set-7
- 1.16 Share this:
Which of the following plant hormone is responsible for seed germination?
D. Abscisic acid
What are Auxins?
Auxins are plant hormones that regulate growth. Auxins also play a role in cell division and differentiation, in fruit development, in the formation of roots from cuttings, in the inhibition of lateral branching (apical dominance), and in leaf fall (abscission). Auxins are abundantly produced in meristematic region of the shoot. Auxins were discovered by botanist Fritz W. Went.
What are the functions of Auxins?
Auxin is a plant hormone that helps control the growth of plants. Auxin promotes cell growth and elongation of the plant. In the elongation process, auxin alters the plant wall plasticity making it easier for the plant to grow upwards. Auxins are responsible for rooting formations.
What are Gibberellins?
Gibberellins are plant hormones that regulate various developmental processes, including stem elongation, germination, dormancy, flowering, flower development, and leaf and fruit senescence. GAs are one of the longest-known classes of plant hormone.
What are the functions of Gibberellins?
Gibberellins are the most important plant growth regulators. These hormones function by increasing the rate of various developmental processes, hence they are called “Growth promoting substances”. Gibberellins act by stimulating cell elongation of different plant organs, especially stems. They also cause broadening of epidermal cells (leaf cells). Gibberellins enhance the development of fruit and induce the formation of seeds.
What is Ethylene?
Ethylene is a natural plant hormone that basically stimulates the growth and senescence. Ethylene is a colorless flammable gas with a faint “sweet and musky” odor when pure. Ethylene is the simplest alkene. Ethylene is widely used in the chemical industry, and its worldwide production exceeds that of any other organic compound.
What is the function of Ethylene?
Ethylene is a hormone that promotes growth and senescence processes depending on its concentration, timing of application, and the plant species.
What is Abscisic Acid?
Abscisic Acid (ABA) is a plant hormone that functions in many developmental processes, including seed and bud dormancy, the control of organ size and stomatal closure. ABA has been shown to control the differentiation of several cell types in plants, such as root cells and stem cells.
What is the function of Abscisic Acid?
Abscisic acid (ABA) plays an important role in seed development and maturation, plant growth and development, and response to the environment. It has been shown to be involved in water stress-related responses such as stomatal closure and programmed cell death (PCD). Abscisic acid (ABA) is a sesquiterpene phytohormone that does not accumulate significantly until after the middle of the seed maturation process.