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

Genetic, Ask quesIn Cross 1, pure-breeding colored, starchy kernel plants (...

Ask quesIn Cross 1, pure-breeding colored, starchy kernel plants (C1Wx/C1Wx) were crossed to plants pure-breeding for colorless, waxy kernels (c1 wx/c1 wx). The F1 of this cross we

What is tubal pregnancy, Q. What is tubal pregnancy? Many times fecunda...

Q. What is tubal pregnancy? Many times fecundation takes place in the Fallopian tubes in general the newly formed zygote is taken to the uterus where nidation and the embryonic

Cost due to damage to equipment, Cost due to Damage to Equipment Cost ...

Cost due to Damage to Equipment Cost due to Damage to Equipment, Property etc. Tooling may have to be redesigned, adding cost. Cost due to reduced output and delay

Nutrition, Nutrition, Feeding, Digestion All organisms require a fairl...

Nutrition, Feeding, Digestion All organisms require a fairly steady supply of nutrient materials from the environment to obtain energy in order to stay alive. The animals are

Which equipments are required for stress laboratory, The stress lab must ha...

The stress lab must have the following equipment: 1) A mercury Blood Pressure apparatus. 2) A Bed so that the patients ECG can be recorded in the recovery period in supine po

The regulation mechanism of glycogenolysis, The  regulation mechanism invo...

The  regulation mechanism involves: a)  The hormones catecholamines (epinephrine, norepinephrine) and glucagon cause the increase in CAMP levels in cells. This CAMP activates p

How does the absence of a nuclear envelope in prokaryotes, How does the abs...

How does the absence of a nuclear envelope in prokaryotes prevent prokaryotes from controlling gene expression by modifying RNA after transcription? Without a nuclear envelope

Why the ph of urine can be quite variable, The ph of urine can be quite var...

The ph of urine can be quite variable. Why? Why is bromothymol blue used as a ph indicator instead of phenal red when titrating blood?

Protozoa, What spices is protozoa

What spices is protozoa

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