不同AM真菌对玉米生长的促生效应

Effects of various AM fungi on the growth of corn(Zea mays )

在盆栽条件下对玉米接种5种不同AM真菌:地表球囊霉、光壁无梗囊霉、单孢球囊霉、根内球囊霉以及土著AM真菌,研究不同AM真菌对玉米的促生效应.结果显示不同AM真菌均能够成功侵染玉米根系,但对玉米生长的促生作用存在差异,除了单孢球囊霉外的4种AM菌剂均对玉米地上部分的生长产生显著的促进效应.对玉米地下生物量而言,只有土著AM真菌具有显著的促进效应,所有AM真菌菌剂均没有显著增加玉米的根长.从综合效应而言,根内球囊霉促生效应最显著,单孢球囊霉对玉米没有显著的促生效应.结果表明不同AM真菌对同一宿主植物促生效应不同,只有选择合适的AM真菌才能产生最佳的效果.

Five AM fungi, Glomus versiforme, Acaulospora laevis, Glomus monosporum, Glomus intraradices, and the indigenous AM fungi, were selected to test their effects on the growth of corn. Results showed that all of the five AM fungi treatments could infected and formed symbiosis with corn roots. The effects of AM fungi on corn growth performance were significant difference. Four AM fungi, except G. monosporurn, could improved the growth of corn significantly, such as total biomass, shoot biomass, plant height and leaf number. To the root biomass, only indigenous fungi have the significant promotion effects. And all kinds of AM fungi have no significant influence on the root length. G. intraradices has the most effects on the growth of corn, and G. monosporum has the least, which means that different AM fungi has different effects on the same host plants.