4.The effects of different concentrations of arsenic on spore germination and rhizoid and prothallium growth of Pteris vittata under aseptic condition were studied.
5.Results showed that germination percentage of urediospore, uredium number and sporulation of challenge inoculation race were reduced after inoculation with weak virulent race.
6.Treatments had been carried out for germination of water dropwort, The results indicated that water dropwort seeds have a low germination percentage and dormancy characteristic.
7.A control program might involve early preplant tillage to encourage germination of the weed seeds, followed by shallow tillage prior to planting to kill the emerged weeds.
13.First, they had to create models that could predict two interactions between plants and fruit-eating animals: germination and how far seeds were dispersed.
15.Like the changes in seed dispersal, these changes in germination inhibition characterize wheat, barley, peas, and many other crops compared with their wild ancestors.
17.Of course, the evolutionary changes (following cultivation) in seed dispersal and germination inhibition would have been unforeseen consequences of what those first farmers were doing.
18.Stifled as they were, they lay in him like seeds too deep for germination, which accident might some day bring near the surface and aerate into life.
19.Finally, their wild ancestors required very little genetic change to be converted into crops—for instance, in wheat, just the mutations for nonshattering stalks and uniform quick germination.
20.They raised 80 bean plants, infested 40 of them with aphids two weeks after germination, and then, three days later, tested samples of the hydroponic solution of each using a process called bioassay-guided fractionation.