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Plant Growth and Development

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Class 10 Class 12
Why is not any one parameter good enough to demonstrate growth throughout the life of a flowering plant?

Different plant parts, tissues and cells grow at different rates in various stages of the life cycle of a plant. Moreover it is difficult to measure the increase in the protoplasm directly. Therefore, a number of parameters are taken into account to demonsstrate growth thrught out the life a flowering plants, so that a approximate growth rate.

What is C/N ratio ?

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

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.

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.

Term kinetinwas coined by whom ?

Skoog and Miller.

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