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

Light - marine ecosystems, Light - Marine Ecosystems Light is a limiti...

Light - Marine Ecosystems Light is a limiting factor in the ocean as it contributes significantly to organic production and distribution of marine life. The ocean is divisible

Chances of a kidney graft being rejected, State two procedures which are us...

State two procedures which are used to reduce the chances of a kidney graft being rejected Drugs are used to suppress the patient's immune response to foreign tissue. The dono

Post-operative care of teeth, Post-operative care of teeth After implan...

Post-operative care of teeth After implant surgery, patients should be warned to expect:  Some swelling and possibly bruising.  Some discomfort which can usually be contr

What are the values of dpd for plant cells under hypertonic, What are the v...

What are the values of DPD for plant cells under hypertonic, isotonic and hypotonic media? In plant cells under hypertonic medium there is loss of water for the exterior, SF >

Bque, what is working of heart

what is working of heart

Show Relation between tissue and the implant material, Relation between Tis...

Relation between Tissue and the implant material The biologic interaction between the tissue and the implant material at an  interface may result in a variety of phenomena such

Dpd for withered (shrank) plant cells, What is the formula of the DPD for w...

What is the formula of the DPD for withered (shrank) plant cells? How is that situation possible? Ans) Withered plant cells are those that shrank because of loss of water by eva

Cardiac output - circulation, Cardiac Output - Circulation The cardiac...

Cardiac Output - Circulation The cardiac output can be determined in a number of ways. The most common method is the Fick's principle. A. Fick a German physiologist in 1870 de

Advantages and disadvantages in usage of solid fuels, Advantages (1)   ...

Advantages (1)   Liquid and gaseous fuels can be manufactured from solid fuels. (2)   Relatively cheap and easily available. (3)   These are easy to transport. (4)   A

Agro industrial-enrichment of soil, Enrichment of soil Indirect provis...

Enrichment of soil Indirect provision of minerals to grazing livestock includes mineral fertilization of  pasture and altering soil pH, however this may not be always feasible

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