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

Relate fibro-osseous retention and osseointegration, Fibro-osseous Retenti...

Fibro-osseous Retention V/S Osseointegration Fibro-osseous retention is the tissue to implant contact interposition of the healthy, dense collagenous tissue between the implant

Define changing body composition - age related functional, Define Changing ...

Define Changing Body Composition and Techniques for Measuring Body Composition? Changing body composition has been suggested as a pathway to explain age-related functional decl

Zone of polarizing activity (zpa), Zone of Polarizing Activity (ZPA) T...

Zone of Polarizing Activity (ZPA) The A-P axis is the 1 st axis to be fixed in the presumptive limb mesoderm at a very early stage. On the basis of results of a series of cur

Hypertensive emergencies, Hypertensive emergencies should be treated within...

Hypertensive emergencies should be treated within one hour. Hypertensive urgencies may be treated more slowly. The term accelerated malignant hypertension is used when retinal haem

Define indicators of mg status - total serum mg, Define indicators of Mg st...

Define indicators of Mg status - Total Serum Mg? Several indicators of Mg status have been described. i) Total Serum Mg: Serum Mg concentration are routinely measured to ass

Explain the histologic techniques, Explain the histologic techniques A...

Explain the histologic techniques A clinician has to base the diagnosis only on the clinical and radiographic findings as microbiologic and histologic techniques are restricte

Haemodynamics of tricuspid regurgitation, Q. Haemodynamics of Tricuspid reg...

Q. Haemodynamics of Tricuspid regurgitation? Right Atrial pressure tracing shows a prominent ‘v' wave and these cannot be appreciated in a patient with atrial fibrillation. RV

Explain about non ionising radiation, Q. Explain about Non ionising radiati...

Q. Explain about Non ionising radiation? Non ionising radiation include infrared and UV rays. Lethal effect is through generation of heat and DNA damage. Penetration is low but

Pteridophytes, What are the affinities of pteridophytes with gymnosperms?

What are the affinities of pteridophytes with gymnosperms?

Define requirement of energy for physical activity, Define requirement of e...

Define requirement of energy for Physical activity? This is the most variable and, after BMR, the second largest component of daily energy expenditure. Humans perform obligator

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