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

What is rh typing of mother & fetus hemolythemolytic disease, What is the R...

What is the Rh typing of the mother and of the fetus in the hemolytic disease of the newborn? In a hemolytic disease of the newborn the mother is Rh- and the fetus Rh+. In thes

Explain the hormonal control of blood sugar levels, The sugar carried in th...

The sugar carried in the blood is glucose; the normal value of sugar in the human bloodstream is approximately 90mg per 100 bloods. Sugar is absorbed from the small intestines and

Newton, meaning of the law of inertia

meaning of the law of inertia

What is gastrulation, What is gastrulation? How during gastrulation are the...

What is gastrulation? How during gastrulation are the first two germ layers formed? What are these germ layers? Gastrulation is the process by which a portion of the blastula w

Cnidaria and platyhelminthes - larval forms, Cnidaria and Platyhelminthes -...

Cnidaria and Platyhelminthes - Larval forms Cnidaria The common larval stage that is found in cnidarians is the planula which forms following gastrulation. The planula is

Ice age, Ice age is an interval of geologic time between 2 million and 10,...

Ice age is an interval of geologic time between 2 million and 10,000 years ago during that period the northern hemisphere experienced several episodes of continental glacial advan

Species diversity - synthetic characters, Species Diversity - Synthetic Cha...

Species Diversity - Synthetic Characters It is one of the most important and basic characteristics of a community. There are various ways of measuring species diversity the si

Ventricular assist devices in circulatory assist devices, Ventricular Assis...

Ventricular Assist Devices :  These come handy when IABP has failed or when prolonged circulatory support is needed. Now Ieft ventricular (LVAD), right ventricular (RVAD) and bive

Difference between a bird heart and a mammalian heart, What is the main dif...

What is the main difference between a bird heart and a mammalian heart? The bird heart has a one aortic arch on the right side of its body while the mammalian heart has one on

What is a recessive gene, What is a recessive gene? With the birth of a...

What is a recessive gene? With the birth of a child, it gets its genes from both parents. Some genes 'override' other genes. Using hair color as instance: If single parent i

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