生物有机肥对香蕉幼苗根系分泌物的影响

The Influence of Bio-Organic Fertilizer on Banana Seeding Root Exudates

通过离位溶液培养法研究了生物有机肥对香蕉幼苗生长和根系分泌物的影响,结果表明:在砂培且不接种病原菌条件下,生物有机肥明显促进香蕉幼苗生长,鲜质量比灭菌有机肥(对照)高19.22%.根系分泌物中的有机酸色谱图比较简单,只有苹果酸、酒石酸和草酸.生物有机肥对根系分泌物中的蛋白质、有机酸和总酚酸影响明显,总酚酸含量比对照降低28.7%,有机酸总量降低29.9%,蛋白质含量提高38.5%.苹果酸变化趋势与蛋白质相似,另外2种有机酸与总酚酸变化一致,可溶性总糖变化趋势不明显.

Banana seedling growth and root exudates were studied by using in vitro bathing root system under the condition of the sand culture and non-inoculated pathogens（FocR4）.The results showed that banana seedling was significantly promoted by bio-organic fertilizer,fresh mass increased by 19.22% as compared with the sterilized organic fertilizer（control）.Protein,total soluble sugar,total phenolic acids and organic acids in root exudates were measured.The map of iron chromatogram was relatively simple,only oxalic acid,malic acid and tartaric acid were found.Bio-organic fertilizer had a significant effect on protein,organic acids and total phenolic acids in root exudates,reduced the contents of total phenolic acids and total organic acids by 28.7% and 29.9% respectively,increased the protein content by 38.5% as compared with the control.The trends of malic acid was similar with protein,and the trends of oxalic acid and tartaric acid was similar with total phenolic acids,but the change of total soluble sugar was not obvious among treatments.