Root - plant growth substances, Biology

Assignment Help:

Root - Plant Growth Substances

Induction of roots by auxins in stem cuttings is a well known phenomenon. The concentrations needed are much lower as compared to that which promotes shoot growth. Auxins also induce lateral root growth at lower concentrations. High concentrations of auxins are inhibitory to root growth. The auxin transport is basipetal in nature. Produced in shoot apex and lateral active shoot buds-auxins percolate towards roots. Obviously, the concentrations that reach roots are low.

The presence of cytokinins is a must for promotion of cell division in root tips. Cytokinins also interact with auxins in the cellular differentiation to produce roots and shoots. Gibberellins do not seem to be having much role in root growth. Ethylene plays vital role in affecting the nastic responses and geotropism. It also promotes dormancy in buds.


Related Discussions:- Root - plant growth substances

Woodland stage - hydrarch, Woodland Stage - Hydrarch When the lowland ...

Woodland Stage - Hydrarch When the lowland has been built up to an extent where the soil is saturated perhaps only in spring and early summer, certain species of shrubs and tr

Syngamy - reproduction, Normal 0 false false false EN-I...

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

What is particularly of the mucous membranes, How would carbon monoxide poi...

How would carbon monoxide poisoning affect a person's coloring, particularly of the mucous membranes? How would it affect the hemoglobin concentration, hematocrit, and percent oxyh

Determine the use of water soluble vitamin A, Water soluble Vitamin A  ...

Water soluble Vitamin A  Water soluble vitamin A is a yellowish green, slightly turbid, fluorescent liquid of faint characteristic odour. The taste is at first faintly sweet an

Budding - types of asexual reproduction, Budding - Types of Asexual Reprodu...

Budding - Types of Asexual Reproduction In reproduction through budding, small groups of cells form buds in some part or parts of the parent animal. The bud grows, differentia

Give the genotypes, Achondroplasia is an autosomal dominant disorder associ...

Achondroplasia is an autosomal dominant disorder associated with a gene on chromosome 4. Sickle cell anemia is due to a gene on chromosome 11. A man and a woman with achondroplasia

Define criteria for assessment of vitamin b12 status, Define Criteria for A...

Define Criteria for Assessment of Vitamin B 12 Status? Low serum or plasma levels of vitamin B 12 should be the first indication of poor  status and this could be confirmed

Importance of family and patient education - food allergy, Define Importanc...

Define Importance of Family and Patient Education - Food Allergy? Remember, involvement of the family and all other relevant caretakers along with the patient is crucial for pr

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