Effect of temperature, Biology

Assignment Help:

Effect of Temperature

Certain plants such as the winter rye (Secale cereale) and the biennial strain of henbane (Hyoscyamus Niger) require exposure to low temperature conditions before they start flowering. A phenomenon known as 'vernalization' or 'Yaronization' was noted by the Russian Plant physiologist Gustav Gussner in 1915. Here also embryo or shoot apex seems to be the site of perception and the role of a hormone 'Vernalin" is suggested. Unfortunately like florigen, vernalin has been still elusive. Gibberellin treatment is known to substitute for cold treatment.


Related Discussions:- Effect of temperature

Define classification of fats and fatty acids, Define Classification of Fat...

Define Classification of Fats and Fatty Acids? You must be wondering in this unit on lipids why we are talking about fats and oils and not using the term lipids. Definitely whe

Social determinants of health - social exclusion, Social Determinants of He...

Social Determinants of Health - Social Exclusion Given that absolute poverty is a major determinant of ill-health, the resultant social exclusion is ‘psychologically damaging,

What is meant by bioassay, What is meant by bioassay? Name the two bio...

What is meant by bioassay? Name the two bioassays that are used to determine auxin activity in plants.

Explain anatomy of leaves of four specimens, A student while studying the a...

A student while studying the anatomy of leaves of four specimens (P - S), observed the following characters: P.  Reticulate venation and no bundle sheath. Q. Parallel venati

Determine the toe motor neuron that excites a toe muscle, Which of the foll...

Which of the following is true for a toe motor neuron that excites a toe muscle that moves the big toe in the right foot? A. The cell body of the toe motor neuron is located in

To test the gas given off when seeds germinate, To test the gas given off w...

To test the gas given off when seeds germinate Place some mustard seeds in a flask with some damp cotton wool, in the apparatus shown in the diagram, and permit them to germina

Selenium, S e l e n i u m Selenium toxicity due to pollution of ...

S e l e n i u m Selenium toxicity due to pollution of environment has been reported in animals. Contamination of pasture from industries emitting fly ash particularly fo

Rbc & wbc, difference between RBC and WBC for homework

difference between RBC and WBC for homework

Explain about the bifidogenic effect, Explain about the Bifidogenic Effect?...

Explain about the Bifidogenic Effect? Fructans selectively stimulate the growth of Bifidobacteria and Lactobacilli, while decreasing concentrations of E.coli, Clostridia and ba

Chromosomal type-genetic basis of sex determination, Chromosomal Type-Genet...

Chromosomal Type-Genetic basis of Sex Determination It refers to the condition where the genes involvcd in sex dcterrnincltion arc located on specific chromosomes known as the se

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