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

Consequences of population growth, T he effects of unlimited population gro...

T he effects of unlimited population growth are as follows: 1.         Increase in unemployment. 2.          Low per capita income. 3.         Low living standard

What are the three periods into which interphase is divided, What are the t...

What are the three periods into which interphase is divided? Interphase is the preceding phase to the mitotic division. It is separated into three periods, G1, S and G2 (the l

Explain extra cardiac conduit fontan, Explain Extra Cardiac Conduit Fontan ...

Explain Extra Cardiac Conduit Fontan ? This can be done with or without cardipulmonary bypass. First step is to make a bi-directional Glenn shunt. The main pulmonary artery is

Explain about the anti obesity drugs, Explain about the Anti Obesity Drugs?...

Explain about the Anti Obesity Drugs? The anti-obesity drugs can be classified into two broad groups as indicated in the Figure. Drugs must be taken only under Doctor's

Define the disorders due to the iodine deficiency, Define the Disorders due...

Define the Disorders due to the iodine deficiency? Mild goitre, i.e., a larger thyroid gland than normal. The mildest form of goitre ranges from those only detectable by to

Show the circulatory system present in arthropods, Q. What is the kind of c...

Q. What is the kind of circulatory system present in arthropods? Do these animals have respiratory pigments and heart? In arthropods the respiratory system is open (lacunar). B

Cytological approach, Write an essay on cytological approach in taxonomy.

Write an essay on cytological approach in taxonomy.

Which type of gamete produced by a heterozygous individual, Which is the ty...

Which is the type of gamete produced by a heterozygous individual? What is the genotypical proportion of these gametes? Heterozygous individuals, for instance, AA, produce two

Determine the placental mammalian embryos, Which is the extraembryonic memb...

Which is the extraembryonic membrane whose function is to store nitrogen wastes of the embryo? Is this function present in placental mammalian embryos? The allantois is the ext

How dissimilar is the gametogenesis in women and in men, Concerning events ...

Concerning events during the periods of life how dissimilar is the gametogenesis in women and in men? The formation of spermatogonia in men takes place during the embryonic per

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