【摘要】 为了探究丛枝真菌对镉（Cd）胁迫下小麦光合系统的调节作用,采用土培试验,以小麦（Triticum aestivum L.）百农207和摩西球囊霉菌（Glomus mosseae GS）为材料,研究了Cd胁迫下接种丛枝真菌对小麦叶片光合速率、气孔导度、蒸腾速率、胞间CO₂浓度、叶绿素荧光参数、叶绿素含量、微量元素铁（Fe）、镁（Mg）、锌（Zn）和镉（Cd）含量的影响。结果表明,接种丛枝真菌的小麦在5 mg·kg^-1Cd胁迫下较未接种小麦,其光合速率、蒸腾速率和气孔导度分别升高了11. 16%、21. 76%和14%,光化学最大效率和叶绿素含量分别升高了5. 56%和6. 56%,Fe、Mg和Zn含量分别升高了6. 63%、20%和4. 29%,Cd含量和胞间CO₂浓度分别降低了18. 50%和17. 62%; 10 mg·kg^-1Cd胁迫时,光合速率、蒸腾速率和气孔导度分别升高了28. 65%、41. 25%和50%,光化学最大效率和叶绿素含量分别升高了1. 43%和15. 33%,Fe、Mg和Zn含量分别升高了7. 81%、30. 77%和9. 74%,Cd含量和胞间CO₂浓度分别降低了32. 20%和6. 45%。因此,接种丛枝真菌可以缓解Cd胁迫以及提高小麦叶绿素含量从而增强光合作用。更多还原

【Abstract】 To investigate the regulation of arbuscular mycorrhizal fungi（ AMF） on photosynthesis of wheat under cadmium（ Cd） stress,the pot-experiment was carried out with wheat（ Triticum aestivum L.） bainong 207 and Glomus mosseae（ GS） as materials. Effects of arbuscular mycorrhizal fungi on photosynthetic rate,conductance to H₂O,transpiration rate,intercellular CO₂ concentration,chlorophyll fluorescence,chlorophyll contents,trace element iron（ Fe）,magnesium（ Mg）,zinc（ Zn） and cadmium（ Cd） contents in wheat leaves were studied under Cd stress. The results showed that the photosynthetic rate,transpiration rate,conductance to H₂O were increased by 11. 16%,21. 76% and14%,chlorophyll fluorescence,chlorophyll content increased 5. 56% and 6. 56%,Fe,Mg and Zn contents increased 6. 63%,20% and 4. 29%,the content of Cd and intercellular CO₂ concentration decreased 18. 50% and 17. 62% under 5 mg·kg-1 Cd stress,respectively. Under 10 mg·kg^-1 Cd stress,the photosynthetic rate,transpiration rate,conductance to H₂O were increased by 28. 65%,41. 25% and 50%; chlorophyll fluorescence,chlorophyll content were increased by 1. 43% and 15. 33%; Fe,Mg and Zn contents by increased were 7. 81%,30. 77% and 9. 74%,but the contentof Cd and intercellular CO₂ concentration decreased 32. 20% and 6. 45%,respectively. Therefore,inoculation of AMF could alleviate Cd stress and increased the chlorophyll content of wheat to enhance photosynthesis.更多还原