Ultrastructural changes in the seeds of Pinus sylvestris L. during senescence
Simola, Liisa Kaarina
The ultrastructure of three parts (endosperm, rootlets and cotyledons) of aged seeds of Pinus sylvestris L. has been studied. In dry seeds no clear differences resulting from ageing are seen as compared with resting living cells, but during imbibition clear differences are evident. Inhibition of development of the DNA containing structures, mitochondria and plastids, was the first indication of senescence. Lipolysis usually preceded proteolysis, in contrast to the course of events in living cells.
ultrastructure; seeds; Pinus sylvestris L.; senescence
Studia Forestalia Suecica
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