Valentová Katerina, Lebeda Ales, Dolezalová Ivana, Jirovský David, Simonovska Breda, Vovk Irena, Kosina Pavel, Gasmanová Nikol, Dziechciarková Marta, Ulrichová Jitka
Institute of Medical Chemistry and Biochemistry, Faculty of Medicine, Palacký University, Hnevotínská 3, CZ-77515 Olomouc, Czech Republic.
J Agric Food Chem. 2006 Feb 22;54(4):1347-52. doi: 10.1021/jf052645u.
This paper focuses on the biological and chemical variability of four yacon (Smallanthus sonchifolius) accessions cultivated under field conditions. Significant variations in tuber shape, weight, content of oligofructans, as well as in leaf isozymes, phenolics, and relative DNA contents were found. Accessions 6 and 88 were the most productive (up to 3.01 and 3.74 kg/plant); accession 48 was the most balanced from the yield aspect in three vegetative periods. A significantly higher content of beta-(2-->1) oligofructans was noted in accessions 48 and 88 as compared to 6 and 60. No difference in sucrose, glucose, and fructose level was observed. Only accession 6 exhibited separate acid phosphatase and esterase isoforms. Accessions 6 and 60 had the highest content of phenolics, and accession 88 had the lowest relative DNA content. Large yacon intraspecific variation may be useful in future detailed research as a good background for breeding, growing, and utilization in industrial processing.
本文聚焦于在田间条件下种植的四个亚贡（Smallanthus sonchifolius）种质的生物学和化学变异性。研究发现，块茎形状、重量、低聚果糖含量以及叶片同工酶、酚类物质和相对DNA含量存在显著差异。种质6和88产量最高（分别高达3.01和3.74千克/株）；种质48在三个营养生长阶段的产量方面最为均衡。与种质6和60相比，种质48和88中β-(2→1)低聚果糖的含量显著更高。未观察到蔗糖、葡萄糖和果糖水平存在差异。只有种质6表现出单独的酸性磷酸酶和酯酶同工型。种质6和60的酚类物质含量最高，种质88的相对DNA含量最低。亚贡种内的巨大变异性作为未来育种、种植和工业加工利用详细研究的良好背景，可能具有重要价值。
