为探明丛枝菌根真菌（arbuscular mycorrhizal fungi，AMF）对盐碱胁迫下不同水稻品种生长和生理特性的影响，采用温室盆栽试验，在盐碱和非盐碱条件下设接种根内根孢囊霉（Rhizophagus intraradices）和不接种处理，研究了耐盐碱水稻品种津源85和盐碱敏感水稻品种辽粳763的根系菌根侵染率、生长特性、抗氧化系统及渗透调节物质的响应情况。结果表明，盐碱胁迫会显著抑制水稻的生长，接种AMF后可提高水稻株高和干物质量，且以津源85效果更好；盐碱胁迫会导致水稻植株MDA和H₂O₂含量增加，接种AMF后会显著提高SOD、POD、CAT和APX的活性，同时 H₂O₂和MDA含量显著降低；此外，AMF还可以通过提高盐碱胁迫条件下植株的脯氨酸、可溶性糖和可溶性蛋白含量来缓解渗透胁迫。可见，AMF可在一定程度上缓解因盐碱胁迫造成的生理生长活性的抑制，通过调控抗氧化酶系统和渗透调节物质来提高水稻对盐碱胁迫适应性，且对不同品种所发挥的效果不完全相同。

To explore the effects of arbuscular mycorrhizal fungi (AMF) inoculation on the growth of different rice varieties under saline alkali stress, the pot culture was conducted in greenhouse to study the root mycorrhizal infection rate, growth characteristics, antioxidant system and osmoregulation responses between saline alkali tolerant rice variety Jinyuan 85 and sensitive rice variety Liaojing 763 under saline alkali and non saline alkali conditions with or without inoculating Rhizophagus intraradices. The results showed that salt alkali stress could significantly inhibit the growth of rice, and AMF inoculation could increase the plant height and dry weight, especially in Jinyuan 85. Moreover, the content of MDA and H₂O₂ in rice plants increased under saline alkali stress. After inoculation with AMF, the activities of SOD, POD, CAT and APX were significantly increased, while the content of H₂O₂ and MDA were significantly decreased. In addition, AMF could also alleviate osmotic stress by increasing proline, soluble sugar and soluble protein content of plants under stress. It can be seen that AMF can alleviate the inhibition of physiological growth activity caused by saline alkali stress to a certain extent, and improve the adaptability of rice to saline alkali stress by regulating antioxidant enzyme system and osmoregulation substances, and the effect of AMF on different varieties is not the same.