What are the kinds of plant geotropisms, Biology

Assignment Help:

What are the kinds of plant geotropisms? Why do the root and the stem present opposite geotropisms?

The kinds of geotropisms are the positive geotropism, that in which the plant grows in favor of the gravitational force, as for instance, in roots and the negative geotropism, that against the gravitational force, for instance, in the stem.

Stem geotropism and Root geotropism are opposed due to different sensitivities to auxin concentration in these structures. The following experiment able to demonstrate the phenomenon: root and Stem are placed in a horizontal position (parallel to the ground) and naturally auxins concentrate along their bottom part.

Under this situation it is observed that the root grows downwards and the stem grows upwards. This happens due to, in the stem the high auxin concentration in the bottom makes this side grow (longitudinally) more and the structures arcs upwards and In the root the high auxin concentration in the bottom inhibits the growth of this side and the upper side grows more making the root to curve downwards.

 


Related Discussions:- What are the kinds of plant geotropisms

Pre pregnancy counselling, Pre Pregnancy Counselling To prevent excess...

Pre Pregnancy Counselling To prevent excess spontaneous abortions and congenital malformations in infants of diabetic mothers, diabetic care, education and counselling must be

Explain uncompetitive inhibition, Uncompetitive inhibition  In this typ...

Uncompetitive inhibition  In this type of inhibition, the inhibitor only binds with the enzyme-substrate complex making  it  inactive.  As  a  result,  the  product formation

Saprophetic mode of nutrition , how parasitic protozoans exibit saprophtic ...

how parasitic protozoans exibit saprophtic mode of nutrition

Nucleus, NUCLEUS First described and christened by Robert brown 1831, a...

NUCLEUS First described and christened by Robert brown 1831, a nucleus is the largest and most important organelle of eukaryotic cells. It is membrane bound and generally locat

Why poriferans and cnidarians do not have excretory systems, Poriferans and...

Poriferans and cnidarians do not have excretory systems. Do platyhelminthes have an excretory system? Platyhelminthes have a primitive excretory system made of flame cells (als

Sexual reproduction, Normal 0 false false false EN-IN ...

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

Photosynthesis - responses of plants to stress, Photosynthesis - Responses ...

Photosynthesis - Responses of Plants to Stress Photosynthesis is also inhibited due to low water potential in the leaves. The leaf water potential is the sum of turgor pressur

Feeding on liquids, Feeding on Liquids Animals feeding on liquids are...

Feeding on Liquids Animals feeding on liquids are generally highly specialised for their feeding habits. Certain protozoa, endoparasites and aquatic invertebrates take up nut

Define alcoholic cardiomyopathy, Q. Define Alcoholic Cardiomyopathy? In...

Q. Define Alcoholic Cardiomyopathy? In a case of dilated cardiomyopathy alcohol cardiomyopathy is suspected if there is history of alcohol intake of 100g/day for more than 10

How does the structure of a crab relate to its habitat, How does the struct...

How does the structure of a crab relate to its habitat? It's difficult exoskeleton protects it for most predators & keeps water off its flesh. The claws are used for mating due

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