【摘要】 为了解干旱胁迫和不同温度处理对岩柿种子萌发的影响，明确岩柿种子萌发适宜温度和耐旱程度，探讨岩柿种子萌发期的抗旱能力。以岩柿种子为材料，在10℃、15℃、20℃、25℃、30℃等不同温度下开展PEG-6 000溶液（0%、5%、10%、15%、20%、25%）模拟干旱胁迫试验。试验结果表明：(1)低温（0℃、10℃）种子不能萌发，重度干旱胁迫(25%PEG)种子不萌发。(2)岩柿种子能在温度为15℃、20℃、25℃、30℃和PEG轻度干旱（5%PEG）、中度干旱（10%、15%PEG)和重度干旱（20%PEG)下萌发，超过10%PEG浓度种子萌发指标受到不同程度的抑制。(3)随着PEG浓度的增加，种子受胁迫程度越高，种子各项发芽指标均呈现先增加后减少的趋势。结论：岩柿种子萌发受温度和干旱胁迫的影响较大，种子萌发适宜温度为20℃～30℃，PEG耐旱范围是0～25%PEG的干旱条件。发芽率与PEG浓度有着显著的负相关（P<0.05)，发芽指数、活力指数与PEG浓度有着极显著的负相关（P<0.01)。抗旱指数与PEG浓度呈负相关，两者相关性不显著（P>0.05)。更多还原

【Abstract】 In order to understand the effects of drought stress and different temperature treatments on seed germination of Diospyros dumetorum, to clarify the appropriate temperature for seed germination and PEG drought tolerance degree, and to explore the drought resistance ability of Diospyros dumetorum seeds during germination. The simulated drought stress experiments of PEG-6 000 solution(0%, 5%,10%,15%, 20%, 25%) was carried out with Diospyros dumetorum seeds as materials at 10℃, 15℃, 20℃, 25℃, 30℃ and other temperatures. The results showed that:(1) The seeds could not germinate at low temperature(0℃, 10℃) and under severe drought stress(25% PEG).(2) The seeds could germinate at temperatures of 15℃, 20℃, 25℃, 30℃ under PEG mild drought(5% PEG), moderate drought(10%PEG, 15% PEG) and severe drought(20% PEG), and the seed germination index was inhibited to some extent when the concentration exceeds 10% PEG.(3) With the increase of PEG concentration, the stress degree of seeds was higher, and all germination indexes of seeds showed a trend of increasing first and then decreasing. Conclusion: the seed germination of Diospyros dumetorumn was greatly affected by temperature and drought stress. The suitable temperature for seed germination is 20℃～30℃, and the PEG drought tolerance range was 0～25% PEG drought condition. The germination rate was negatively correlated with PEG concentration(P<0.05), and the germination index and vigor index were negatively correlated with PEG concentration(P<0.01). Drought resistance index was negatively correlated with PEG concentration, but the correlation was not significant(P>0.05).更多还原