Abstract The influence of seed testa color, temperature and seed water content on
dormancy release and seed viability loss in the endangered, endemic species Silene diclinis
(Lag.) M. Laı´nz was evaluated. Dormant heterogeneous seeds (black, red and grey colored)
were exposed to three different temperatures (5, 20, and 35C) and two relative humidities
(33 and 60%) in order to assay their dormancy release. Longevity behavior was studied for
the three colored seeds, storing samples at nine different combinations of temperature
(5, 20 and 35C) and relative humidities (33, 60 and 90%). According to our findings, seed
heteromorphism was not related to neither break of dormancy nor seed storage behavior.
Silene diclinis seeds present dormancy after collection, and need an after-ripening period to
germinate. Temperature and relative humidity are positively correlated with dormancy
release and seed ageing. Therefore, both factors must be carefully controlled during seed
manipulation in the laboratory for long term seed conservation purposes. When seeds are
stored immediately after collection (dormant), if the temperature of storage is above the
base temperature for dormancy release found in this work (between 2.7 and 1.6C), seeds
may eventually overcome dormancy. On the other hand if seeds are stored after an afterripening
period, storage at low temperature does not induce secondary dormancy(Mira et al. 2011).
摘要:
評估頻危物種Silene diclinis (Lag.) M. Laı´nz的種皮顏色，溫度和種子含水量對種子活力和解決休眠的作用。種子異質性休眠(黑色、紅色和灰色)置於三種不同的溫度(5, 20, and 35℃)和二種相對濕度下(33 and 60%)以期找出解除休眠的機制。樣本分別儲存在九個不同溫度(5, 20, and 35℃)和濕度(33,60 and 90%)的組合下，以研究三種不同顏色種子壽命的變化。據我們研究的結果，種子異質性和儲存沒有相關也不能解除休眠。目前 Silene diclinis 的種子採收後會休眠，需要經過後熟才能發芽。溫度和相對濕度與解除休眠及種子老化呈正相關。因此，在實驗期間必須謹慎的控制這兩個因素以達到長期保存種子的目的。種子採集後立即儲存(休眠)，如果儲存溫度超過解除休眠的基礎溫度(2.7 and 1.6℃之間)，最後種子可能可以克服休眠。另一方面，如果種子在後熟期後儲存在低溫下，就不會引起二次休眠(Mira et al. 2011)。
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不過...
這麼乏味的東西應該不會有人感興趣的
進度仍然很慢
光靠意志力是不行的?!
那我還需要些什麼...
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