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

Explain the term- pupil, Explain the term- PUPIL Pupil is  the  apertu...

Explain the term- PUPIL Pupil is  the  aperture in  centre of  the  iris diaphragm that regulates entry  of  light into the eye. Colour of  pupil  is  said  to be  black. Actu

How the type of sport influence protein requirements, How the type of Sport...

How the type of Sport influence protein requirements? The type of sport and total calorie intakes influence protein requirements. Eating sufficient foods to meet high energy re

Illustrate numerical taxonomy, Q. Illustrate Numerical Taxonomy? Taxono...

Q. Illustrate Numerical Taxonomy? Taxonomy today is, in many dctails, different from what it was a generation ago. The use of computers by taxonomists has established an intere

Who was gregor mendel, Who was Gregor Mendel? Mendel is considered the ...

Who was Gregor Mendel? Mendel is considered the father of Genetics. He was a monk, biologist and botanist born in Austria in 1822 and who died in 1884. During the years 1853 to

Hirschsprungs disease, Hirschsprungs Disease (Congenital Megacolon): T...

Hirschsprungs Disease (Congenital Megacolon): This  is also known as congenital megacolon. There is absence of ganglion cells, submucus plexus  and intramural plexus  (parasym

Define the community ecology of disease, Define the Community ecology of di...

Define the Community ecology of disease? Lyme disease is a debilitating infectious disease which has emerged in North America in the last two decades in the landscape context o

What is enhancers , While  various  positive  control  components  li...

While  various  positive  control  components  lie  close  to the  gene  they  regulate additional can be situated long distances away (sometimes 10-50 kb) either upstream or downs

Vitamin, fish liver oil is rich in which vitamin ???

fish liver oil is rich in which vitamin ???

Rk, how many chromosomes in human

how many chromosomes in human

Types of hormones, T ypes of hormones - (i) Releasing and Inhibitory ...

T ypes of hormones - (i) Releasing and Inhibitory hormones - Hormones of hypothalamus and kidney (renin) which control secretion of trophic hormones. (ii) Trophic hormon

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