<p>The effects of commercial storage of cabbage seeds on the germination of seeds and the emergence and growth of seedlings have been studied. Progressive ageing of seeds caused loss of seed vigour which resulted in poor emergence and growth of seedlings and the formation of abnormal seedlings. Loss of vigour was also observed indirectly in the controlled deterioration test (CD test) that speeds up the rate of ageing at controlled conditions. It was shown that the CD test gave the best indication of vigour loss. Low vigour seeds also differed from high vigour seeds in a more substantial loss of potassium ions during incubation in soil. Apart from seed vigour also soil conditions and other environmental factors influence the field performance that under certain atmospheric and soil conditions the best possible result is obtained.<p>Pre-incubation of cabbage seeds in osmotic solution clearly showed that several aspects of seed ageing are reversible. Pretreated seeds germinated earlier and faster and produced more normal seedlings than untreated seeds. The mechanism of osmotic pretreatment was studied. It 'is unlikely that such treatment favours the accumulation of osmotic constituents. The leakage of K <sup><font size="-2">+</font></SUP>was inhibited during osmotic incubation. Loss of vigour might be related to membrane damage.
|Qualification||Doctor of Philosophy|
|Award date||22 Sep 1987|
|Place of Publication||S.l.|
|Publication status||Published - 1987|
- brassica oleracea
- seed testing