【摘要】 甲基丁二酸对马铃薯试管苗生长的影响随浓度而变化。在10～30mg/L的浓度范围内,具有促进植株生长的效应;浓度高于50mg/L时,具有缩短试管苗节间、降低株高的作用。试管苗保存试验的结果表明,在10℃、500～1000 lx条件下保存11个月后,生长在加有甲基丁二酸培养基中的试管苗比对照苗矮小、粗壮,存活率高于对照。品种间存活率提高的程度有差异,在30,50,70,100mg/L时,品种Manona的存活率分别比对照提高32.1、36.3、38.4和53.8％;疫不加的存活率分别比对照提高60.0,63.4,103.2和113.5％。除浓度外,甲基丁二酸对试管苗存活率的影响与培养保存的温度有关,当溫度从16～20℃降到10℃时,保存11个月后的试管苗存活率从0～5.9％增加到70～93.3％。更多还原

【Abstract】 The effects of methyl succinic acid on growth of potato plants in vitro varied with the concentrations used in the medium. Within the concentration range from 10—30mg/L methyl succinic acid promoted plant growth, but shortened the internode and plant height while the concentration was above 50mg/L. Stored in an environmentally controlled chamber at 10℃ under artificial light (500～1000 lx) set at cycles of 8 hours light and 16 hours dark for 11 months, the plants grown on the medium containing methyl succinic acid were shorter than the control plants. The survival ratio was higher than control but varied with varieties. At a concentration of 30, 50, 70, and 100mg/L the survival ratioes had increased by 32.1, 36.3, 38.4 and 53.8% for cv. Manona, and 60.0, 63.4, 103.2 and 113.5% for cv. Epoka over the control, respectively. Moreover, the survival ratio was also affected by the environmental temperature. When the incubation temperature decreased from 16～20℃ to 10℃, the survival ratio increased from 0～5.9% to 70～93.3% after 11 months storage.更多还原