Int J Phytoremediation. 2014;16(3):235-46. doi: 10.1080/15226514.2013.773275.
The growth response of endophyte-infected (EI) and endophyte-free (EF) tall fescue to salt stress was investigated under two growing systems (hydroponic and soil in pots). The hydroponic experiment showed that endophyte infection significantly increased tiller and leaf number, which led to an increase in the total biomass of the host grass. Endophyte infection enhanced Na accumulation in the host grass and improved Na transport from the roots to the shoots. With a 15 g l(-1) NaCl treatment, the phytoextraction efficiency of EI tall fescue was 2.34-fold higher than EF plants. When the plants were grown in saline soils, endophyte infection also significantly increased tiller number, shoot height and the total biomass of the host grass. Although EI tall fescue cannot accumulate Na to a level high enough for it to be termed a halophyte, the increased biomass production and stress tolerance suggested that endophyte/plant associations had the potential to be a model for endophyte-assisted phytoextraction in saline soils.
在两种生长系统（水培和盆栽土壤）下，研究了内生菌感染（EI）和内生菌无感染（EF）高羊茅对盐胁迫的生长响应。水培实验表明，内生菌感染显著增加了分蘗和叶片数量，从而增加了宿主草的总生物量。内生菌感染增强了宿主草对 Na 的积累，并改善了 Na 从根部向地上部的运输。在 15 g l(-1) NaCl 处理下，EI 高羊茅的植物提取效率是 EF 植物的 2.34 倍。当植物在盐渍土壤中生长时，内生菌感染也显著增加了分蘗数、株高和宿主草的总生物量。尽管 EI 高羊茅不能积累到足以被称为盐生植物的 Na 水平，但增加的生物量生产和对胁迫的耐受性表明，内生菌/植物的共生关系有可能成为盐渍土壤中内生菌辅助植物提取的模型。
