干热处理对蒙古莸种子萌发的影响

Effects of Dry Heat Treatment on Seeds Germination of Caryopteris mongolica Bunge

对蒙古莸种子进行不同温度和时间的干热处理。结果表明，60℃和75℃各时间段、85qC下4～12h以及95℃下4～8h的干热处理，对蒙古莸种子活力无明显影响；直至95℃处理12～24h开始，各发芽指标才逐渐开始下降，而经过105℃处理8h后，蒙古莸种子发芽事仍然保持在46．67％左右，说明蒙古莸种子在干燥的环境中具有极强的高温抵抗能力。

The seeds of C. mongolica were treated at different temperatures and various time, the results showed that the dry heat treatments below 95 ℃ did not obviously decrease the activities of the seeds. Germination indexes reduced gradually with 12 - 24 h treatments at 95 ℃ while the seeds germination rate still remained at 46.67% after 8 h treatment at 105 ℃. All the data indicated that the seeds of C. mongolica have special resistant ability to heat and drought environment stress.