What is phototropism, Biology

Assignment Help:

What is phototropism?

Phototropism is the movement of plant structures in response to light. Phototropism might be positive or negative. Positive phototropism is that in which the plant movement (or growth) is towards the light source and negative phototropism is that in which the movement (or growth) is inverse, away from the light source.

Phototropism relates to auxins as the exposition of one side of the plant to light makes these hormones concentrate in the darker side. This fact makes the auxin action upon the stem to be positive, i.e., the growth of the darker side is more intense and the plant arcs towards the lighter side. In the root (when submitted to light, in general experimentally) the auxin action is negative (over the positive range), the growth of the darker side is inhibited and the root curves towards this side.

Plant Physiology - Image Diversity: phototropism

 


Related Discussions:- What is phototropism

Dot blot, Dot blot  is the technique for measuring the amount of one pertic...

Dot blot  is the technique for measuring the amount of one perticular DNA or RNA in the highly complex mixture. The samples are spotted onto the hybridization membrane (like nitroc

Osmotic function - essential elements, Osmotic Function - Essential Element...

Osmotic Function - Essential Elements Plant cells generally contain mineral ions 10 to 1000 times higher in concentration than the surrounding soil. That is why water enters t

#title.Homework., Why do you think it is necessary for physicians to have s...

Why do you think it is necessary for physicians to have so many different terms that describe fractures (compound, comminuted, transverse, greenstick, etc.)?

Homomorphic types - intra specific incompatibility, Homomorphic Types - Int...

Homomorphic Types - Intra specific Incompatibility It is characterized by morphologically indistinguishable mating types within a species. A proper breeding is required for th

Under nourished persons - nutritional intervention using mna, Define Under ...

Define Under nourished persons - nutritional intervention using MNA? An MNA score below 17 indicates that the patient is suffering from under nutrition.  Thus in this situatio

What is diffusion, Diffusion is the spreading of substance molecules from a...

Diffusion is the spreading of substance molecules from a region where the substance is more concentrated to other region where it is less concentrated. For example, during the boil

Cytochemistry, Cytochemistry It is well known that certain stains and d...

Cytochemistry It is well known that certain stains and dyes specifically combine with certain chemical components of the cell. Cytochemical techniques take advantage of this fa

Explain tropical rain forests in biomes, Explain Tropical Rain Forests in b...

Explain Tropical Rain Forests in biomes? You probably are well aware of the danger that the world's rain forests are facing in terms of extinction! There are huge numbers of sp

Syrup has cured the cough, A person with a cough takes a patent cough syrup...

A person with a cough takes a patent cough syrup. In three days, the cough is better. Does this mean that the syrup has cured the cough?  Justify your answer. There is insuffic

Bovine viral diarrhoea, Bovine viral diarrhoea Bovine viral diarrhoea ...

Bovine viral diarrhoea Bovine viral diarrhoea (BVD) and mucosal disease (MD) are clinically dissimilar disease syndrome yet have a common viral etiology. The acute disease is

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