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

How are the epithelial tissues classified, Q. How are the epithelial tissue...

Q. How are the epithelial tissues classified? The epithelial tissues are classified according to the shape of the cells that form it epithelial cells may be columnar, cuboidal,

Explain about the invert sugar, Explain about the Invert sugar? Invert ...

Explain about the Invert sugar? Invert sugar is sucrose, which can be hydrolysed to split the disaccharide into its component sugars, fructose and glucose. It is known as inver

In what ways does over gazing lead to soil erosion?, Ask In what ways does ...

Ask In what ways does over gazing lead to soil erosion?

Determine the term - vascular disorders, Determine the term - Vascular diso...

Determine the term - Vascular disorders Normal central nervous system functioning can be affected by a number of vascular problems, because blood-vessel disease or damage can g

Write the meaning of polydypsia, Q. Write the meaning of Polydypsia? In...

Q. Write the meaning of Polydypsia? Increased Thirst (Polydypsia): As the patient is losing more water through excessive urination, the patient feels thirstier and tends to tak

Structure into which follicle is transformed after ovulation, Q. What is th...

Q. What is the structure into which the follicle is transformed after ovulation? What is the importance of that structure in the menstrual cycle? The follicle that released the

What is an illustration of gene control, Q. What is an illustration of gene...

Q. What is an illustration of gene control? An elegant instance of gene control in bacteria is operon system. A cluster of genes which is responsible for synthesizing a particu

Controlled percussive instruments, Percussive instruments -this method...

Percussive instruments -this method used a selected and controlled percussive removal force -Instruments delivers an impact either directly to a restorative or indirectly t

Respiration, abnormal lung volumes and capacities

abnormal lung volumes and capacities

Define hydrolytic rancidity - lipolysis, Define hydrolytic rancidity Li...

Define hydrolytic rancidity Lipolysis is a major action occurring during deep fat frying due to large amounts of water introduced from the food and the relatively high temperat

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