【摘要】 采用热空气恒温(50℃)干燥法对蓝桉种子进行超干处理,将蓝桉种子含水量由自然干燥的9.8%分别降至9%、8%、7%、6%、5%、4%、3%、2%、1%,研究超干燥处理对蓝桉种子发芽及生理生化特性的影响。结果表明:蓝桉种子耐脱水性较强,脱水至5%时,未发现种子活力明显下降,细胞膜能保持较好完整性,电导率最低,α-淀粉酶和脱氢酶活性高,各发芽能力指标在9个超干处理中最好。对各测定指标综合分析表明,蓝桉种子超干处理是完全可行的,最适含水率为5%,为蓝桉种子超干燥处理和贮藏提供了依据。更多还原

【Abstract】 The method of the hot air constant temperature(50 ℃) was used in this experiment to carry on ultra-drying processing on the seeds of Eucalyptus.globulus,the main forest tree in South China.The water content of the seeds of E.globulus was decreased from 9.8% by natural drying to 9%,8%,7%,6%,5%,4%,3%,2%,1% separately to study the effect of ultra-drying processing on the germination and the physiological characteristics of the seeds of E.globulus.The results indicated that the seeds of E.globulus bore strong dehydration.When dehydrated to 5%,the cell membrane could maintain a better integrity and the activeness of α-amylase and dehydrogenase were up to the highest without obvious drop of the seed vigor.When the seed water content was 5%,the factors of germinative capacity were the best of all 9 water content gradients in ultra-drying processing.In brief,the ultra-drying processing did not affect the germinative of the seeds of E.globulus significantly and the most suitable water content was 5%.It was concluded that it was completely feasible to process and store the seeds of E.globulus in an ultra-drying environment.更多还原