<正>以1年生金丝小枣嫁接苗为试材，研究硅对盆栽苗在盐胁迫下各胱甘肽过氧化物酶（GSH-PX）、超氧化物歧化酶（SOD）和过氧化物酶（POD）活性的影响。结果表明：在盐浓度（NaCl质量分数）小于0.4%时，SOD和GSH-PX的活性随着土壤含盐量的增加而增加。POD活性在NaCl质量分数为0.25%的盐胁迫下升高，在NaCI质量分数为0.4%的盐胁迫时下降；盐胁迫下加硅可以显著提高金丝小枣SOD、POD和GSH-Px的活性且差异显著。笔者认为盐胁迫下给土壤施硅可以缓解盐分对金丝小枣的毒害作用。

RAPD markers OPAI17-1550 and OPAI13-900, linked to anti-black-spot disease gene locus, were successfully converted into SCAR markers named SAI17-1570 and SAI13-292 respectively by sequencing and designing of primers. SAI17-1570 and SAI13-292 were validated in the resistant、 susceptible pools and F1 population. The SAI17-1570 had the same amplification with templates of the positive OPAI17-1550 F1, population and resistant pool, did not have amplification with templates of the negative OPAI17-1550 F1 population and susceptible pool. The SAI13-292 had one band with templates of the negative OPAI13-900 F1 population and susceptible pool, but two bands with templates of the positive OPAI13-900 F1 population and resistant pool. The two SCAR markers could be of great importance for clone selection on seedling stage.