World Library  
Flag as Inappropriate
Email this Article

Seed testing

Article Id: WHEBN0003285022
Reproduction Date:

Title: Seed testing  
Author: World Heritage Encyclopedia
Language: English
Subject: Tetrazolium chloride, Seeds, Germination, Seed
Publisher: World Heritage Encyclopedia

Seed testing

Seed testing is performed for a number of reasons, including research purposes or to determine if seed storage techniques are functioning. There are four tests most commonly done. The first two listed below are common for scientific research.

For commercially sold seed, all four of these tests are done in dedicated laboratories by trained and usually certified analysts. The tests are designed to evaluate the quality of the seed lot being sold.[1]

  • Germination test: Reports the percentage of seed that germinated. In commercial settings, tests are usually made in either 200 or 400 seed samples.
  • Viability or TZ test: A test for viability that involves three steps: 1. preconditioning (imbibition); 2. preparation and staining (sometimes cutting the seed and then soaking the seed in a 2,3,5 triphenyl tetrazolium chloride solution); and 3. evaluation (examining the seed for a color change in the embryo).
  • Purity test: The percentage of seed described on the label that is actually found in the quantity of seed.
  • Weed test: Examines a sample of seed and identifies every seed that is different from the labeled seed kind.


  1. ^ Society of Commercial Seed Technologists

Other information about practices in the USA can be found at the following sites:

  • Association of Official Seed Certifying Agencies
  • Society of Commercial Seed Technologists
  • Association of American Seed Control Officials (AASCO)
  • Association of Official Seed Analysts
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.