中文摘要：

通过盆栽试验研究了宿根高粱接种摩西球囊霉形成共生体后在核素铯污染胁迫下内源激素和光合生理的响应.结果表明：铯胁迫促进了宿根高粱叶片脱落酸（ABA）的合成,降低了生长素（IAA）、赤霉素（GA）以及玉米素核苷（ZR）的积累,从而导致了ABA/IAA和ABA/GA明显升高,接种摩西球囊霉减少了铯胁迫下IAA、GA以及ZR的降幅以及ABA的增幅,维持了ABA/IAA、ABA/GA和ABA/（IAA＋GA＋ZR）的稳定性;铯胁迫显著降低了植物净光合速率（Pn）、气孔导度（gs）、胞间CO2浓度（Ci）、蒸腾速率（Tr）、光呼吸（Pr）以及暗呼吸（Dr）等光合指标和呼吸指标,造成植物光合效率降低,接种摩西球囊霉缓解了铯胁迫给植物光合效率造成的负效应.说明在利用植物修复核素污染土壤时可引入摩西球囊霉等丛枝菌根真菌,以提高植物光合效率及同化产物,增强植物耐性,提高修复效率.

英文摘要：

A pot experiment was conducted to analyze the effects of Funneliformis mosseae on en- dogenous hormones and photosynthesis in leaves of Sorghum haipense grown in soil contaminated with Cs. The results showed that Cs stress profoundly promoted abscisic acid （ABA） synthesis and decreased indoleacetic acid （IAA） , gibberellin （GA） , and zeatin riboside （ZR） contents in Sor- ghum haipense leaves, which led to significant increases in ABA/IAA and ABA/GA ratio. How- ever, F. mosseae inoculation reduced the IAA, GA and ZR decreasing amplitudes and the ABA in- creasing range, which would maintain the ratio of ABA/IAA, ABA/ GA and ABA/（IAA＋GA＋ ZR）. Radionuclide cesium pollution significantly reduced the photosynthetic rate （Pn）, stomatal conductance （gs）, intercellular CO/concentration （ Ci ） and transpiration rate （ Tr） , which caused the plant photosynthetic efficiency to be lower than control. F. mosseae could alleviate the negative effect caused by cesium pollution on plant photosynthetic efficiency. It is suggested that to improve the efficiency of photosynthesis and anabolin, enhance plant tolerance and improve bioremediation efficiency, arbuscular mycorrhizal fungi （AMF） such as F. mosseae could be introduced into the field of phytoremediation in radionuclide contaminated soils.