Alison A. Powell
|ECOM liaison officer||
- To develop and validate vigour tests for introduction to the ISTA International Rules for Seed Testing.
- To encourage the use of vigour tests by seed laboratories.
- To provide information and training to ensure that vigour tests are carried out to achieve repeatability between, and reproducibility within, laboratories.
The object of a seed vigour test is to provide information about the planting value of seeds in a wide range of environments and the storage potential of seed lots.
The development of new vigour tests by the Vigour Committee is soundly based on the physiological nature of differences in seed quality, namely seed ageing/deterioration and the metabolic repair of deterioration, which is achieved during the early stages of germination (Matthews et al., 2012; Powell & Matthews, 2012). This basis in science, and the establishment of a clear link between test results and a practical outcome of vigour, e.g. emergence (rate and final), seedling uniformity and storage potential, is a major emphasis of the work of the Committee.
Chapter 15 on Vigour was introduced to the ISTA Rules in 2001, including the accelerated ageing test and the conductivity test. Two further vigour tests have been added to those already validated, namely the controlled deterioration (CD) test for Brassica (added to the Rules in 2010) and the radicle emergence (RE) test (2012). In addition, there are now more species to which the conductivity test can be applied.
|Working Programme||Activity Reports||Documents||Articles|
|Publications list on the background to vigour tests
by ISTA Vigour Committee 2006-2016
Radicle emergence test: physiological basis and development guidelines for new species
Towards automated single counts of radicle emergence to predict seed and seedling vigour
Computer vision for monitoring seed germination from dry state to young seedlings
Electrical Conductivity Vigour Test: Physiological Basis and Use
Towards the validation of the controlled deterioration vigour test for small-seeded vegetables