葡萄根系抗寒性的研究

STUDIES ON COLD HARDINESS OF GRAPE ROOTS

本试验检测了国内外19个葡萄砧木和栽培品种根系抗寒性的临界致死温度指标,发现在抗寒性上存在较大的差异。试验表明采用电导法与根段培养相结合的方法,在测定葡萄根系抗寒性上较为实用可靠,而 TTC还原法结果不稳定,缺乏规律性。 对葡萄根系结构的扫描电镜观察初步看出,根系结构特点与抗寒性有一定的相关性。抗寒品种与不抗寒品种在皮层与射线细胞大小、组织紧密度、皮层在根系结构中占的比例以及导管大小和密度上存在一定的差异。

In this experiment,we determined winter critical killing temperatures for 19 grape varieties and species (including 16 rootstocks ) . There is great difference in cold hardiness among the varieties tested. This may provide suggestive basis for choosing cold resistant rootstocks. We also compared several methods for testing cold hardiness and found that the combination of electrolytic conductance method with the method of root section culture was more simple and reliable. By observing the tissue structure with an electronic scanning microscope, we found that the characteristics of root structure have a certain correlation with cold hardiness. These may have some significance in forecasting and screening cold resistant grape rootstocks before further rootstock compari-son experiments are made.