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

Handling animals in lab, Handling : The desire for survival is same whethe...

Handling : The desire for survival is same whether in animals or human beings. You may be aware of the ability of even tiny animals to scratch and bite. So we won't say any more o

What are diastolic compressive forces, Q. What are Diastolic Compressive Fo...

Q. What are Diastolic Compressive Forces? Coronary perfusion pressure equal to pressure gradient between the coronary arteries and the pressure in LV in diastole. When coronary

Porifera, what are the general characteristicss of porifera

what are the general characteristicss of porifera

Animal nutrition, What are fluid and deposit feeding in holozoic animals

What are fluid and deposit feeding in holozoic animals

Define the swab or agar - food microbiology, Define the Swab or Agar - Food...

Define the Swab or Agar - Food Microbiology? Slant Method The method involves sampling with cotton swabs that are transferred directly to slants. Other methods include use of u

Explain precautions for detection of metanil yellow, Explain Precautions fo...

Explain Precautions for Detection of Metanil Yellow? 1. One should be careful while using concentrated HCl otherwise it may result in burn. 2. Amount of concentrated HCl in

Explain adverse effects of foscarnet, Explain Adverse Effects of foscarnet ...

Explain Adverse Effects of foscarnet  Renal dysfunction often develops during treatment with foscarnet and is usually reversible, but renal failure requiring dialy sis may occu

Define high density lipoproteins, Q. Define High Density Lipoproteins ? ...

Q. Define High Density Lipoproteins ? High density lipoproteins (HDL) are the smallest of the lipoprotein species and transport approximately 20 to 30 per cent of plasma choles

Hyperlipidemia, Dyslipidemia is an important correctable factor for Coronar...

Dyslipidemia is an important correctable factor for Coronary Artery Disease. There is a strong, independent, continuous, and graded relation between total cholesterol (TC) or low-

Write the definition of counselling, Q. Write the definition of counselling...

Q. Write the definition of counselling? The counselling process, involves various steps in a sequence as given below: 1. Rapport-Building 2. Locating the Problem 4. Pl

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