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 quest of nutrition required for excercise, Define quest of nutrition...

Define quest of nutrition as sports nutrition as a discipline? Although the quest of nutrition as applied to exercise and sports dates back to ancient civilizations and importa

By which term liverworts and mosses are characterized, Liverworts and mosse...

Liverworts and mosses are characterized by their lack of vascular conducting tissue. These two groups of liverwort, plants and mosses, are known by which of the below terms: a)

What do the major organs of the digestive system do, What do the major orga...

What do the major organs of the digestive system do? They are salivary glands, teeth, tongue, gums, esophagus, stomach, small intestine, large intestine, pancreas, liver, and g

Classification of microorganisms, Q. Classification of microorganisms? ...

Q. Classification of microorganisms? The microorganisms use our food as a source of nutrients for their own growth. This, of course can result in deterioration of the food. By

Introduction to cleavage, INTRODUCTIO N - Karl Von Baer - Coined th...

INTRODUCTIO N - Karl Von Baer - Coined the term cleavage. Swammerdom - First time seen cleavage. Prevost and Dumas - Reported cleavage of frog's egg. Spllanzani - Detail

What is immunopurification, Purifying antigens present in small quantities ...

Purifying antigens present in small quantities as a mixture by relating an antibody to an antigen.

Explain about the high risk pregnancies, Explain About the High Risk Pregna...

Explain About the High Risk Pregnancies? Until now we have considered the nutritional needs of pregnant women. In this sub-section, we will consider specific conditions that co

List principles to keep in mind for designing the messages, Q. List princip...

Q. List principles to keep in mind for designing the messages? o Develop a positive theme. Approaches are more effective when they promote positive messages that state clear

Heart in amphibians, Amphibia n - 3 chambered heart 2 auricles and ...

Amphibia n - 3 chambered heart 2 auricles and 1 ventricle. Sinus venosus and truncus arteriosus (its main part is pylengium) present. Incomplete double circulation prese

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