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

Define reagent required and methodology for picric acid test, Define reagen...

Define reagent required and methodology for picric acid test? Reagents  - Sugar solutions of glucose, fructose, galactose, lactose, maltose, sucrose and starch. - Saturat

How to obtain the correct healing collar, To obtain the correct Healing Col...

To obtain the correct Healing Collar the following steps need to be followed: - Determine the si-e of the implant platform.76 Practical Manual - Select the emergence profile

Traumatology, Traumatology : This is the study of wounds. In other words we...

Traumatology : This is the study of wounds. In other words we can say that traumatology  is the study of wounds or injuries which can be caused by accidents or violence to a person

Difference between an ecological niche and a habitat, What is the differenc...

What is the difference between an ecological niche and a habitat? An ecological niche is a set of peculiar activities, resources and methods that a species explores to survive

Biological fixation - nitrogen fixation, Biological fixation - Nitrogen Fix...

Biological fixation - Nitrogen Fixation Approximately 63% of all nitrogen fixed is through biological fixation. Nitrogen fixing organisms are primarily prokaryotes; bacteria a

What are the three categories of food protein, What are the three categorie...

What are the three categories in which food protein sources can be divided into Protein food sources can be separated into the following three categories: Proteins of pl

What are the nitrogen wastes, Q What are the nitrogen wastes? Nitrogen ...

Q What are the nitrogen wastes? Nitrogen wastes are residuals derived from the degradation of proteins and they are made from chemical transformation of the amine group of amin

Segmentation - metazoa, Segmentation - Metazoa Segmentation or metamer...

Segmentation - Metazoa Segmentation or metamerism is the division of the body into smaller transverse compartments along the anterior-posterior axis. Segmentation is widesprea

What is prophylaxis, Q. What is prophylaxis? The Prophylaxis is measure...

Q. What is prophylaxis? The Prophylaxis is measures taken to prevent diseases. For instance, the use of condoms in sexual relations is a prophylaxis against contamination by ag

Explain free water - water found in food, Explain Free Water - Water Found ...

Explain Free Water - Water Found in Food? Water which is bound by such minute forces, that its vapour pressure is equal to the vapour pressure of pure water. It can be found as

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