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

Comparison with amphibian gastrulation, Comparison with Amphibian Gastrulat...

Comparison with Amphibian Gastrulation On comparison of chick gastrulation along with amphibian gastrulation you will find many similarities along with significant difference

Hydration control by active pump mechanisms in corneal, How is hydration co...

How is hydration control by active pump mechanisms responsible in the corneal hydration? Hydration Control by Active Pump Mechanisms: a) Na/K ATPase pump, which is more acti

Osmoregulation in marine non-chordate metazoans, Osmoregulation in Marine N...

Osmoregulation in Marine Non-Chordate Metazoans Studies on the osmotic pressure of body fluids of marine organisms have displayed that their internal osmotic pressure is more

Marine biology, What are the four characteristics that all chordates have ...

What are the four characteristics that all chordates have at some stage of their lifecycle ?

Which enzyme acts on pyruvate in mitochondria, Which enzyme acts on pyruvat...

Which enzyme acts on pyruvate in mitochondria and converts it to acetyl CoA?Name its components and cofactors associated with it. Pyruvate dehydrogenase complex acts on pyruvate

Hyperventilation and respiratory alkalosis, A 48-year-old male patient, who...

A 48-year-old male patient, who normally enjoys good health, has been admitted to the hospital for the treatment of polycythemia vera. The nurse who is providing care for the patie

Why neuron a is a healthy neuron, Why Neuron A is a healthy neuron Neu...

Why Neuron A is a healthy neuron Neuron A is a healthy neuron with all the usual ion channels.  When at rest with a membrane voltage of R millivolts, neuron A produces no acti

Where smooth muscle may be found in human body, a) Name three parts of the ...

a) Name three parts of the body where smooth (involuntary or unstriated) muscle may be found. b) In any one of your examples, say what the smooth muscle does.

Define the objectives to learn about the food processing, Define the Object...

Define the Objectives to learn about the food processing? After studying this unit, you will be able to: Discuss the concepts and aims of food processing Describe t

What percentage of the offspring will be tall, Tall (T) plants are dominant...

Tall (T) plants are dominant and short (t) plants are recessive. Two heterozygous tall plants are crossed. What percentage of the offspring will be tall?

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