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Plant Growth and Development

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Biology

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Biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
What is floral hormone ?

The floral hormone or Florigen hormonal substance(s) that is responsible for flowering. The hormonal substance migrates from leaves to shoot apices for inducing flowering only when the plants are exposed to the inductive photoperiod.

 Give the types of auxins.

Auxins are of two types :

(1) Natural auxins : These are naturally occuring auxins, isolated from plants and are regarded as phytohormones e.g. IAA. NAA etc.

(2) Synthetic auxins : These are synthesized by artificially e.g. IBA 2,4-D etc.


 Term kinetinwas coined by whom ?

Skoog and Miller.

What is C/N ratio ?

C/N ratio is the ratio of carbohydrates and nitrogenous compounds which regulate the growth in plants. 

Who coined the term gibberellin ?

Yabuta.

Who isolated auxin and from where ?

Auxin was isolated by F.W. Went from tips of coleoptiles of oat seedling.