Role of chemical factors in controlling apical dominance, Biology

Assignment Help:

Role of Chemical Factors in Controlling Apical Dominance

There were indications about the existence of plant hormones in the last part of 19th century. The plant hormones had been isolated and characterized in the third decade of this century. By the middle of this century we became aware of different types of plant hormones like auxins, gibberellins, cytokinins, abscisic acid and ethylene. The first four are chemical substances that influence growth in solutions and interestingly ethylene is a gas and perhaps the only hormone of its type.

The first four plant hormones are isolated in crystal form from plant sources and their chemical structure is well characterized. Unlike the case of animal hormones, plant hormones exhibit a broad spectrum of effects on growth and development. Quite often same growth process may be regulated by more than one plant hormone. This applies to apical dominance also. Prior to the discovery of plant hormones and their role in apical dominance it was thought that apical dominance is a kind of struggle for existence and competition between apical bud and lateral buds for nutrients from the root and leaves.


Related Discussions:- Role of chemical factors in controlling apical dominance

Pulmonary function tests - diagnostic tests, Pulmonary  Function Test: ...

Pulmonary  Function Test: Pulmonary functions  tests (PFTs) provide information about a clients manifestation by measuring lung volumes, lung mechanics, and diffusion capabili

Haemodynamics of tricuspid regurgitation, Q. Haemodynamics of Tricuspid reg...

Q. Haemodynamics of Tricuspid regurgitation? Right Atrial pressure tracing shows a prominent ‘v' wave and these cannot be appreciated in a patient with atrial fibrillation. RV

Protozoa phylum, what is the main quality of this phylum

what is the main quality of this phylum

Which cell count elevates in case of allergy or plastic worm, Which cell co...

Which cell count is likely to be elevated when an individual has an allergy or parasitic worms? a) Red blood cells b) Erythrocyte c) Eosinophil (pron: e-o-sin-o-fill)

Explain imiquimod, Imiquimod (Aldara) This immunomodulator is FDA-appro...

Imiquimod (Aldara) This immunomodulator is FDA-approved for topical treatment of external and perianal genital warts, which are caused by papillomavirus. Gradual clearance of w

Adrenocortical steroids - vertebrates, Normal 0 false false ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Explain ground meristem in primary root growth, Explain Ground Meristem in ...

Explain Ground Meristem in Primary Root Growth? To review, the protoderm is the primary tissue that eventually forms the outside layer that covers the root and shoot and leaves

Excretory system, extensive note on the excretory system of amphibian

extensive note on the excretory system of amphibian

Define the effect of dietary fibre on nutrient absorption, Define the effec...

Define the effect of dietary fibre on Nutrient Absorption? Nutrient Absorption: Inclusion of fibre has been shown to retard the absorption of some nutrients. The inclusion of v

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd