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

What is calvin cycle, What is Calvin Cycle? The dark reactions of photo...

What is Calvin Cycle? The dark reactions of photosynthesis are also known as the Calvin cycle. This process synthesizes glucose molecules using carbon dioxide from the atmosphe

Which is the type of nitrogen waste, Which is the type of nitrogen waste el...

Which is the type of nitrogen waste eliminated by beings of the class Reptilia? These beings excrete mainly uric acid. This substance is less toxic than ammonia and it can be k

What is cyanotic spells, What is Cyanotic Spells ? Hypercyanotic or Cy...

What is Cyanotic Spells ? Hypercyanotic or Cyanotic spell is a pediatric emergency, which requires prompt recognition, and intervention to prevent disabling cerebro-vascular i

Types of joints, 1.      FIBROU S OR IMMOVABLE JOINTS - Occur between ...

1.      FIBROU S OR IMMOVABLE JOINTS - Occur between the bones of cranium & in the tooth suckets commonly in the form of sutures. 2 .      CARTILAGINOUR OR SLIGHTLY MOVAB

Discuss resting membrane potential and nerve action potentia, Question 1 W...

Question 1 Which are the 3 different processes in the formation of urine? Explain Question 2 Discuss resting membrane potential and nerve action potential Question 3 Nam

Anticodon, Anticodon is the series of three nucleotides on the transfer RN...

Anticodon is the series of three nucleotides on the transfer RNA molecule which recognizes and pairs with the specific codon on a messenger RNA molecule; it helps in controlling t

Coadapted communities, From your studies in ecology, you must be aware that...

From your studies in ecology, you must be aware that most ecosystems are quite complex consisting of several habitats and that habitats in turn are composed of microhabitats. Each

Golgi complex, GOLGI COMPLEX ( GOLGI APPARATUS = GOLGI BODY) The Nobel ...

GOLGI COMPLEX ( GOLGI APPARATUS = GOLGI BODY) The Nobel laureate, Camilla  Golgi (1898)  discovered  the  presence of a special,  small group  of interconnecting  membranous  s

Pathophysiology of mitral stenosis, Q. Pathophysiology of mitral stenosis? ...

Q. Pathophysiology of mitral stenosis? Normally there is no pressure gradient between left atrium and the left ventricle during diastole. However, as the valve orifice size dec

Steps for prevention industrial accidents, Steps for Prevention Industrial ...

Steps for Prevention Industrial Accidents These steps are as follow: Substitute a less hazardous equivalent. Remove worker from hazard (e.g. automate the sys

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