丛枝菌根真菌对棉花耐盐性的影响研究

盆栽灭菌试验研究丛枝(AM)真菌对棉花耐盐性的影响结果表明,自然盐渍化土壤和人工模拟盐渍条件下接种AM真菌处理的生物产量显著高于不接种处理,相同土壤下菌根真菌对棉花植株生长的促进作用随盐水平的提高而增大,表明AM真菌与植株建立的共生关系有利于棉花在盐渍土壤中生长。盐胁迫下棉花植株对P的需要量增加,接种AM真菌可提高植株含P量,促进植株生长,提高棉花的耐盐性。

Effect of arbuscular mycorrhizal fungi on salinity tolerance of cotton

Artificial salt soil and five nature salinized soils are used to investigate the effect of arbuscular mycorrhizal (AM) fungi on the saline tolerance of cotton.The results show that the inoculation with AM fungi increases the biomass of cotton plant under both artificial and nature salinized soils significantly.The effects of AM fungi on cotton growth are also promoted with the increase of salt levels.This may indicate that the mycorrhizal-plant association is beneficial for plant growth in salinity environment.Phosphorus concentrations in non-mycorrhizal plant show a up trend with saline level increasing and mycorrhizal plants have higher phosphorus concentration at all salt levels than that of non-mycorrhizal plants.This indicates that cotton plant needs more phosphorus to maintain metabolism and growth under salt stress.