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

Determine the occurrence of folic acid, Occurrence of folic acid Folic...

Occurrence of folic acid Folic acid is an active principle widely  occurring in the animal and vegetable kingdom. Richest sources are liver, dark  green leafy vegetables, bean

Effects of cardiac output and hormones, Excluding the effects of cardiac ou...

Excluding the effects of cardiac output and hormones, describe the other factors that may affect blood pressure and blood flow in a middle-aged man who is exercising in an aerobics

Define some beneficial effects of fungi, Define some Beneficial Effects of ...

Define some Beneficial Effects of Fungi? 1. These act as decomposers and can degrade complex organic molecules in dead plants and animals to simple organic compounds and inorga

Coelomoducts of molluscs, Coelomoducts of Molluscs In Molluscs, like ...

Coelomoducts of Molluscs In Molluscs, like in Crustacea nephridia are absent. But certain of the larval pulmonates do possess protonephridia suggesting that they have been se

Biochemical production, Plants are the source of a large variety of bioche...

Plants are the source of a large variety of biochemicals which are metabolites of both primary and secondary metabolism. But secondary metabolites are of much greater interest s

Verify where recombination happens along a chromosome, In a follow up to Al...

In a follow up to Alfred Sturtevant's studies on recombination in the fruit fly, Seymour Benzer used complementation studies of bacteriophage mutants to verify where recombination

Define hepatic cholesterol synthesis, Q. Define Hepatic Cholesterol Synthes...

Q. Define Hepatic Cholesterol Synthesis? This is a highly complex process beginning with acetyl CoA formed from fatty acid oxidation or from carbohydrate breakdown. The rate-de

How is striped pattern of the striated muscle cells formed, How is the stri...

How is the striped pattern of the striated muscle cells formed? The functional units of the muscle fibers are the sarcomeres. Within the sarcomeres blocks of myosin and actin

Zoology, find the habits and habitats of scyphas?

find the habits and habitats of scyphas?

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