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

Zooflagellates – protozoan, Zooflagellates – Protozoan Zooflagellates ...

Zooflagellates – Protozoan Zooflagellates are heterotrophs that are free living, commensals or symbiotic or parasitic in other animals. A number of species eg. Trichonynzpha a

Describe the process of rodent control, Q. Describe the process of Rodent c...

Q. Describe the process of Rodent control? Rats and mice are destructive and cause huge loss of stored food commodities. They transmit pathogenic bacteria. Rats and mice are ge

Define arterial vessels - arterioles and arteries, Q. What are arterial ves...

Q. What are arterial vessels, arterioles and arteries? Arterial vessels are every blood vessel that carries blood from the heart to the tissues, arterioles and Arteries are art

O-linked oligosaccharides , Most proteins made by ribosomes on the RER (rou...

Most proteins made by ribosomes on the RER (rough endoplasmic reticulum) are glycoproteins, which is they hold short chains of carbohydrates (oligosaccharides) covalently related t

Ornithophily - cross-pollination, Ornithophily - Cross-pollination In ...

Ornithophily - Cross-pollination In tropical areas, the birds dominate over insects as important pollinators. The most common among them are humming-birds, sun-birds and honey

Health benefits of dietary factors - antinutritional effect, Define Health ...

Define Health Benefits of Other Dietary Factors with Antinutritional Effects? Despite the predominantly nutritional antagonistic effects of the factors described above, there i

Define non-digestible oligosaccharides (ndo), Define Non-Digestible Oligosa...

Define Non-Digestible Oligosaccharides (NDO) Among the various food components, the best prebiotic effects seen to be exerted by the NDOs. They are oligomeric carbohydrates, wh

Explain point mutations gene, Explain Point Mutations gene? Mutations ...

Explain Point Mutations gene? Mutations involving single genes occur by addition, substitution, or deletion of a single base in DNA. Such mutations, called point mutations, ca

Explain reality theory, Reality Theory Developed in  the 1960s by  Will...

Reality Theory Developed in  the 1960s by  Willian glasser,  a  psychiatrist,  reality  therapists  view human nature in terms of behaviour. They believe that human behaviour i

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