What are the types of plant geotropisms, Biology

Assignment Help:

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

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

Root geotropism and stem geotropism are opposed due to dissimilar sensitivities to auxin concentration in these structures. The following experiment can demonstrate the phenomenon: Stem and root are placed in a horizontal position (parallel to the ground) and naturally auxins concentrate with their bottom part. Under this condition it is observed that the stem grows upwards and the root grows downwards. This occurs because in the stem the high auxin concentration in the bottom makes this side grow (longitudinally) more and the structures arcs upwards. 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 types of plant geotropisms

Management of diet for diabetes, Q. Management of Diet for diabetes? Di...

Q. Management of Diet for diabetes? Diet plays a very important role in management of diabetes as it exerts a direct influence on the blood glucose levels. It is one of the vit

Describe RNA Structure, The basic parts of RNA are the same than for DNA wi...

The basic parts of RNA are the same than for DNA with two major differences. The pyrimidyne base uracil exchange thymine and ribose replace deoxyribose see the sugar, pyrimidines a

Define affluence availability of food as factor for obesity, Define Affluen...

Define Affluence and abundant availability of food as factor for obesity? With increasing affluence, increase in purchasing power and abundance of food, people tend to eat more

What is resting membrane potential of a neuron, What is resting membrane po...

What is resting membrane potential of a neuron? What is the function of sodium potassium pumps in maintaining it?

Disadvantages of m - mode echocardiography, Various structures are seen in...

Various structures are seen in two-dimensional planes; hence mental conceptualization is still required because the heart is three-dimensional. Now, newer technology has evolved

How is the circulatory system of birds characterized, How is the circulator...

How is the circulatory system of birds characterized? Birds, as every vertebrate, have a closed circulatory system. The heart is same to the mammalian heart, having four chambe

Definition of infective endocarditis, Infective endocarditis (IE) is a micr...

Infective endocarditis (IE) is a microbial infection of the endothelial surface of the heart. The characteristic lesion, the vegetation, is a variably sized amorphous mass of plate

Somatic and germline gene therapy, All the cells present in the body contai...

All the cells present in the body contain genes and an approach targeted to modulate the expression of genes is known as gene therapy. This novel approach has emerged by the end of

Explain spoilage by yeasts, Q. Explain Spoilage by yeasts? Yeasts domin...

Q. Explain Spoilage by yeasts? Yeasts dominate in the spoilage of fruit products which contain high acid content due to their ability to tolerate high acid environment. Yeast

Define briefly the enzymatic proteins, Define Briefly the Enzymatic Protein...

Define Briefly the Enzymatic Proteins? The most varied and very highly specialized proteins are those along with catalytic activity - the enzymes. Virtually all the chemical re

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