NaCl胁迫对低植酸小麦突变体材料种子萌发特性的影响

植酸广泛存在于禾谷类和豆类等作物种子中,近年来利用诱变技术选育低植酸作物新品种已成研究热点。本研究在不同NaCl浓度处理下,对前期通过60Co-γ辐射获得的9份低植酸小麦突变体材料进行萌发试验。结果表明,0.5%NaCl能促进种子萌发,而1.0%、1.5%NaCl明显抑制种子萌发,在其胁迫下,种子幼苗和主根生长受到抑制。初步筛选到耐盐性较好的低植酸小麦突变体材料4份,分别为lp14、lp49、lp55、lp50。

The Effect of NaCl Stress on Seed Germination of Wheat Mutants with Low Phytic Acid

Phytic acid (PA)is naturally stored in seeds of a wide range of cereal and legume crops.In recent years,it has become a research hotspot to breed crop varieties with low phytic acid (LPA)by using mutagenesis technology.In the current research,we ob-tained nine LPA wheat mutants by 60 Co -γradiation,and then assessed their salt tolerance using a germination test with different con-centrations of NaCl.As a result,their seed germination was promoted at 0.5% NaCl concentration,but substantially inhibited at 1.0% and 1.5% NaCl concentrations;all tested NaCl concentrations produced an inhibitory effect on seedling growth and primary root growth.Among the nine LPA wheat mutants,four (lp14,lp49,lp50,and lp55)showed higher salt tolerance,which may be used as materials for breeding wheat varieties with salt tolerance in the future.