Some people with chest pain have normal or minimal narrowing of heart arteries; in these patients, vasospasm is a more likely cause for the pain, sometimes in the context of Prinzmetal's angina and syndrome X.
You are here. Pure Live Seed. Pure live seed (PLS) is a measure used by the seed industry to describe the percentage of a quantity of seed that will germinate. PLS is obtained by multiplying the purity percentage by the percentage of total viable seed, then dividing by 100.
The longevity also varies among species, varieties, seed lots, and even among individual seeds inside the same bag. This is why, within a seed lot, some seeds are alive and others are dead. The relative proportion of these two components (live seeds and dead seeds) can be determined by TZ and/or germination. 6.