Auxins, Biology

Assignment Help:

Auxins

The history of discovery of auxin is a fascinating chapter in plant physiology. The hormone auxin was discovered first, through some elegant experiments by Charles Darwin and his son Francis around 1880. They found that if a coleoptile of a grass (Phalaris) was illuminated from one side it bends towards light. However, if the tip region was covered, no bending occurred. In his book "The Power of Movement in Plants" published in 1880, Darwin wrote that some matter in the upper part, which is acted upon by light, transmits its effect to the lower part causing the latter to bend.

1574_Auxins.png

Figure: Darwin's experiment on canary grass coleoptiles


Related Discussions:- Auxins

Explain mitosis properly, Q. Does the mitosis properly occur after or befor...

Q. Does the mitosis properly occur after or before the interphase? Is it a simple "point of view" issue? Mitosis have to be considered a succeeding phase after interphase since

To study the structure of a seed, To study the structure of a seed Soak...

To study the structure of a seed Soak seeds of bean, pea, pumpkin, sunflower, corn and other large forms. Take away the seed- coats and carefully cut the seeds open. Discover t

Nutritional management in inflammatory bowel disease, Q. Nutritional Manage...

Q. Nutritional Management in Inflammatory Bowel Disease? Adequacy of nutritional needs and minimizing stress on the inflamed or narrowed segment of the bowel are the main princ

What is secretary diarrhoea, Q. What is Secretary diarrhoea? Secretary ...

Q. What is Secretary diarrhoea? Secretary diarrhoea: It is a result of active secretion OF electrolytes and water by the intestinal epithelium caused by bacterial and viral inf

Explain the behaviour of pteridophytes, Q. Why are pteridophytes better ada...

Q. Why are pteridophytes better adapted to dry land than bryophytes? Were pteridophytes always less abundant than phanerogamic plants? Although pteridophytes and bryophyt

Auxins, Auxins The history of discovery of auxin is a fascinating chap...

Auxins The history of discovery of auxin is a fascinating chapter in plant physiology. The hormone auxin was discovered first, through some elegant experiments by Charles Darw

Define some symptoms of epilepsy, Define some Symptoms of Epilepsy? The...

Define some Symptoms of Epilepsy? The general symptoms of epilepsy include weakness, fainting, uncoordinated muscle movement. Based on the drug, common side effects include nau

Name main parts into which a neuron can be divided, What are the three main...

What are the three main parts into which a neuron can be divided? What are their respective functions? The three mains parts into which a neuron can be didactically separated a

Sexual reproduction, SEXUAL REPRODUCTION You must be aware that reproduct...

SEXUAL REPRODUCTION You must be aware that reproduction is one of the distinguishing features of living beings. Reproduction is basically of two types: asexual and sexual. In ase

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