摘要 : Malus prunifolia is an important germplasm resource for apple rootstock. However, no comprehensive and systematic evaluation has been made of its salt tolerance. We compared salt injury (SI), net photosynthetic rate (Pn), variatio... 展开 Malus prunifolia is an important germplasm resource for apple rootstock. However, no comprehensive and systematic evaluation has been made of its salt tolerance. We compared salt injury (SI), net photosynthetic rate (Pn), variation percentage (VP) of electrolyte leakage (EL), relative water content (RWC) and adverse resistance coefcients (ARC) in nine biotypes of Malus prunifolia when plants were exposed to 150 mM NaCl for 10 days. Two other valuable rootstock sources (M. sieversii and M. hupehensis) were also analyzed. Under highsalinity conditions, all growth parameters except EL were signicantly decreased compared with the untreated control. The greatest changes were found with Pn. Values for RWC and ARC also declined under saline treatment, although the extent of that decrease varied among biotypes. Based on our results for SI, as well as ARC and cluster analysis, we deemed these biotypes to be salt-tolerant: M. prunifolia ‘fupingqiuzi’, M. prunifolia ‘dongbeihuanghaitang’, M. prunifolia ‘laoshannaizi’, M. sieversii, and M. hupehensis. By contrast, M. prunifolia ‘baihaitang’, M. prunifolia ‘wulenghaitang’ and M. prunifolia ‘neimengguhaihong’ proved to be salt-sensitive. 收起