Studia Forestalia Suecica

ODC 232.315 015.28 The ultrastructure of three parts (endos.vernz, rootlets and cotyledorrs) of aged seeds o f 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 D N A containing structures, mitochondria and plastids, was the first indication o f senescence. Lipolysis usually preceded proteolysis, in contrast to the course o f events in living cells. Ms received 1974-08-15 Liber Forlag-Allmanna Forlaget ISBN 91-38-02082-3 Berlingska Boktryckeriet, Lund 1974