低温冷藏对雪花梨花粉生活力影响

以盛果期雪花梨花粉为试材,通过对冷藏0～8年花粉发芽率的测定,研究了低温冷藏不同年份对雪花梨花粉生活力的影响。结果表明:冷藏1～3年的花粉发芽率与新采花粉无显著性差异,而冷藏4～5年的花粉,其发芽率降低程度与新采花粉有明显差异。冷藏6～8年的花粉在发芽率上,与新采花粉的发芽率有显著降低。通过冷藏后常温下不同保存时间对花粉生活力研究表明,其发芽率随着冷藏时间的延长而下降。干燥的雪花梨花粉可以在-20℃低温条件下冷藏8年,常温下使用的时间最好在24h之内。

Effects of Pollen Viability of 'Xuehua' Pear by Lower Temperature Storage

Effects on ＇Xuehua＇ pear Pollen viability on the low-temperature refrigeration in different years by testing the rate of pollen germination stored for 0 ~ 8 years was studied in this paper. The results showed that there was no significant difference in pollen germination rate between refrigerated 1~3 years and the new pollen, while there were significant differences in pollen germination rate between the refrigerated 4~5 years and the new pollen. Pollen germination rate reduced significantly in the frozen 6~8 years compared with the new. After testing the refrigerated pollen viability at different ambient temperatures, the studies have shown that the germination rate declined with the extension of cold storage time. As we can see, dried ＇Xuehua＇ pear pollen can be refrigerated -20 ℃ for eight years while can be used at room temperature within 24 hours.