应用激光共聚焦显微扫描术研究小麦矮腥黑穗病菌和小麦网腥黑穗病菌冬孢子的自发荧光特性

Study on the autofluorescence in TCK&TCT with laser scanning confocal microscope

本文应用共聚焦激光扫描显微术(CLSM)对小麦矮腥黑穗病(TCK)和小麦网腥黑穗病菌(TCT)冬孢子的自发荧光特性进行了研究。研究表明:在这两种冬孢子中,它们各自都含有自发荧光物质,而且都能在488nm、543nm这2种波长激发光激发下,分别在相应的510～530nm、580～600nm范围中得到相应发射光,只是在488nm波长激发光激发下,两种冬孢子发射出的光荧光强度最高,荧光光分布均匀,大体形态清楚;但层切扫描发现自发荧光在这两种冬孢子的空间分布存在明显差异:TCK冬孢子的自发荧光物质主要分布在外孢壁和网脊上,而在原生质中分布少;TCT冬孢子的自发荧光物质主要分布在原生质中,孢壁分布少,而网脊上不分布。应用CLSM在实际TCK检测工作中,能克服荧光显微镜存在的检测重复性较差、可靠性小的缺点,提升了TCK检验检疫的技术水平。

Autofluorescence was observed in the teliospores of Tillctia corttroversa （TCK） and T. caries （TCT） with laser scanning confocal microscope （LSCM）. This study found different autofluorescence characteristics in two teliospores under the 488nm light excitating and high resolution layer-cut scanning. The results indicated fur- ther that the autofluorescence substances in TCK teliospores were mainly distributed to the outer spore wall and the net ridge, and in TCT were in protoplasm. The level of TCK test in inspection and quarantine would be improved by using LSCM.