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

Benefits and dangers using dna , Read the information found in the Bioethic...

Read the information found in the Bioethics: Choices for the Future box on page 40 of the text entitled "Should you Bank your Stem Cells?"  Based on the information given, discuss

Explain non-nucleoside reverse transcriptase inhibitors, Non-nucleoside rev...

Non-nucleoside reverse transcriptase inhibitors (NNRTIs) - These drugs are direct, non-nucleoside inhibitors of HIV-1 reverse transcriptase. Combinations of an NNRTI with NRTIs

How to measure blood pressure, Q. How to measure Blood Pressure? With t...

Q. How to measure Blood Pressure? With the onset of exercise, the resistance to blood flow through contracting muscles decreases significantly and results in a fall in the peri

How chloroplasts multiply, Q. How chloroplasts multiply? Like mitochond...

Q. How chloroplasts multiply? Like mitochondria chloroplasts have their own the DNA, ribosomes and RNA and they self-replicate through binary division.

Nitrogen fixation in soil, what is the process of nitrogen fixation in soil...

what is the process of nitrogen fixation in soil by bacteria

What are angiosperms, What are angiosperms, the flowering plants? What is t...

What are angiosperms, the flowering plants? What is the major feature that distinguishes them from the gymnosperms? Flowering plants have flowers and seeds (phanerogamic plants

What has caused evolution, What has caused evolution? 1) Different indi...

What has caused evolution? 1) Different individuals have dissimilar characteristics 2) These differences result in altering abilities to reproduce under local circumstances

What do you mean by recovery period, Q. What do you mean by Recovery Period...

Q. What do you mean by Recovery Period? At the instant exercise is discontinued, the ECG recorded is turned on and left running for a few seconds while the blood pressure is re

Entropy, Entropy is the degree of disorder in a system. As the energy is t...

Entropy is the degree of disorder in a system. As the energy is transferred from one form to another form, some of it is lost as heat; as the energy decreases, the disorder in 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