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.
Mile-a-minute seeds can survive for up to six years in the seed bank, although most seed germinates during the first and second year (Hough-Goldstein et al. 2015). Some full-sized green seed can germinate even before it becomes fully mature and turns blue (Smith et al.