Temperature - seed dormancy, Biology

Assignment Help:

Temperature - Seed Dormancy

Low temperature treatment is an essential prelude to germination in many seeds, and high temperature may be inhibitory at the time of germination. The low temperature chilling requirement is frequently met artificially by the process of stratification. The seeds are layered in trays in cold moist air for a period of several weeks or months. Temperatures between 0 and 10?C are most effective. The chilling requirement is variously located in the embryo or the seed coat, sometimes in both. The chilling requirement of apple seeds, for example, is much longer for intact seeds than for seeds with the coats removed, or for isolated embryos. Red light and GA have a synergistic effect, that is, the combination of both factors stimulates germination more than the sum of the two separately.


Related Discussions:- Temperature - seed dormancy

Gas exchange, Gas Exchange Gill surface area must be large enough to p...

Gas Exchange Gill surface area must be large enough to provide adequate exchange of gases. Therefore, highly active fish have largest relative gill area. Figure compares highl

Protazoa, In what order did the four phyla of protazoa evolve and why in th...

In what order did the four phyla of protazoa evolve and why in this order?

What is the lasting form in the gametophyte, Q. What is the lasting form in...

Q. What is the lasting form in the gametophyte, pteridophytes or the sporophyte? How can it be compared to bryophytes? The lasting form in pteridophytes is the diploid (2n) spo

What do you mean by dicoumarol, Q. What is dicoumarol? How does this substa...

Q. What is dicoumarol? How does this substance act in the clotting process and what are some examples of its toxicity? Coumarinic anticoagulants cannot be administered during p

What is the relationship between hypothesis and a theory, What is the relat...

What is the relationship between the following scientific terms: hypothesis, a theory, and a natural law?

Define eye balling, Q. Define Eye Balling? Ans. Two-dimensional ec...

Q. Define Eye Balling? Ans. Two-dimensional echocardiography provides a good visual perception of cardiac functions. With experience, the echocardiologist learns to percei

Determine the self-monitoring of blood glucose, Self-Monitoring of Blood Gl...

Self-Monitoring of Blood Glucose (SMBG) In SMBG, patients measure and monitor their blood sugar level by themselves and assess their condition and know the response to the trea

What is saliva, What is Saliva Saliva   is  the colourless  viscous  f...

What is Saliva Saliva   is  the colourless  viscous  fluid.  It  helps  in  swallowing the  food  by lubricating the food and the neutral pH of saliva prevents the decalcifica

Phosphorus cycle, Phosphorus cycle is sedimentary cycle because it does not...

Phosphorus cycle is sedimentary cycle because it does not enter into atmosphere. It can be found on earth in water, soil and sediments. The phosphorus cycle is the biogeochemical c

Can you explain major ecological roles of bacteria, Q What are the major ec...

Q What are the major ecological roles of bacteria? Bacteria are responsible for the decomposition process at the end of food webs and chains in this process they also liberate

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