Villiers T A
Department of Biological Sciences, University of Natal, Durban, South Africa.
Plant Physiol. 1974 Jun;53(6):875-8. doi: 10.1104/pp.53.6.875.
Increase in moisture content of seeds of Lactuca sativa L. and Fraxinus americana L. in air-dry storage caused a rapid decline in longevity and an increase in the rate of accumulation of chromosome aberrations. Storage of seeds fully imbibed but unable to germinate allowed a high germination capacity to be maintained for long periods, together with a very low incidence of chromosome aberrations. Seedlings grown from dry-stored seeds showed an increase in morphological abnormalities with length of storage, whereas seedlings from imbibed-stored seeds appeared normal. It is suggested that in dry tissues, enzyme-controlled turnover and repair may be temporarily suspended, and that this may be an important factor in the loss of seed viability in storage. The effect of increasing seed longevity by lowering the moisture content of dry-stored seeds is discussed in relation to this hypothesis. The relevance of the proposal is also discussed in relation to ecological studies.
在空气干燥储存条件下，莴苣（Lactuca sativa L.）和美国白蜡树（Fraxinus americana L.）种子的含水量增加会导致寿命迅速缩短，染色体畸变积累速率加快。完全吸胀但无法萌发的种子储存能长时间维持较高的发芽能力，同时染色体畸变发生率极低。由干藏种子培育出的幼苗随着储存时间延长形态异常增多，而由吸胀储存种子培育出的幼苗看起来正常。有人提出，在干燥组织中，酶控制的周转和修复可能会暂时停止，这可能是储存种子活力丧失的一个重要因素。本文结合这一假设讨论了通过降低干藏种子含水量来提高种子寿命的效果。还结合生态学研究讨论了该提议的相关性。
