Huang Ren-hua, Yang Hi-ling, Huang Wei, Lu Yun-mei, Chen Ke
Ying Yong Sheng Tai Xue Bao. 2015 Jul;26(7):2146-50.
A pot experiment was conducted to analyze the effects of Funneliformis mosseae on endogenous 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 Sorghum haipense leaves, which led to significant increases in ABA/IAA and ABA/GA ratio. However, F. mosseae inoculation reduced the IAA, GA and ZR decreasing amplitudes and the ABA increasing 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 CO2 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.
通过盆栽试验分析了摩西管柄囊霉对生长在铯污染土壤中的黑高粱叶片内源激素和光合作用的影响。结果表明，铯胁迫显著促进了黑高粱叶片脱落酸（ABA）的合成，降低了吲哚乙酸（IAA）、赤霉素（GA）和玉米素核苷（ZR）的含量，导致ABA/IAA和ABA/GA比值显著升高。然而，接种摩西管柄囊霉降低了IAA、GA和ZR的下降幅度以及ABA的增加幅度，从而维持了ABA/IAA、ABA/GA和ABA/（IAA+GA+ZR）的比值。放射性核素铯污染显著降低了光合速率（Pn）、气孔导度（gs）、胞间CO2浓度（Ci）和蒸腾速率（Tr），导致植株光合效率低于对照。摩西管柄囊霉能够缓解铯污染对植物光合效率造成的负面影响。建议为提高光合作用和同化作用效率、增强植物耐受性并提高生物修复效率，可将摩西管柄囊霉等丛枝菌根真菌（AMF）引入放射性核素污染土壤的植物修复领域。
