磷水平对接种丛枝菌根真菌甜玉米苗期生长的影响  

Effects of phosphorus concentration on growth of Arbuscular mycorrhizal sweet corn

作　　者：夏婷婷[1] 王志鹏[1] 张柳婵 金海如[1] 

机构地区：[1]浙江师范大学化学与生命科学学院,浙江金华321004

出　　处：《工业微生物》2017年第3期49-53,共5页Industrial Microbiology

基　　金：国家自然科学基金(41371291);浙江省新苗人才计划项目(2015R404064);金华市科学技术研究计划农业类重点项目(2014-2-011)

摘　　要：研究了不同外源磷水平条件下,接种丛枝菌根真菌根内球囊霉(Glomus intraradices)对寄主植物甜玉米菌根侵染率、地上部和地下部鲜重、氮磷含量、精氨酸含量影响。结果表明:丛枝菌根真菌能够很好的侵染于玉米植株根系。且不同磷水平条件下,菌根侵染率差异较显著。在低磷水平下,菌根侵染率较高。孢子数量随着磷水平提高而增加。菌丝室根外菌丝鲜重在P40时最高。菌根化的甜玉米生物量及氮磷含量显著高于对照组。此外,低磷水平促使甜玉米地上部和地下部鲜重显著提高。甜玉米地上部总氮和地下部总氮含量分别在P40、P80和P20、P40时最高。地上部总磷和地下部总磷含量分别在P80和P160时最高。菌根精氨酸含量在低磷(P20)时最高。研究表明接种丛枝菌根真菌可促进甜玉米幼苗生长并与外源磷水平有关。The Arbuscular mycorrhizal （AM） was inoculated to the host plant sweet corn with different phosphorus concentration （PC） and their effects on infection rate of mycorrhizae, N and P content in shoot and mycorrhizal root of corn, Arg content in mycorrhizal roots were investigated. Results showed that： AM fungi infected of the corn root system and significant differences of infection rates were observed at different PC. The infection rate at low PC was higher than that at high PC. The numbers of spores increased with the increment of PC. The fresh weight of the external hyphae inside the chamber in P40 was the highest. The blomass and N and P content in shoot and root of mycorrhizal sweet corn were obviously higher than those of control group. Moreover, low PC significantly promoted the increment of fresh weight in shoot and mycorrhizal root of sweet com. The total N contents in shoot and root of mycorrhizal sweet corn were highest in P40, PS0 and P20, P40. The total P contents in shoot and root of mycorrhizal sweet corn were highest in P80 and P160. Arg content in mycorrhizal root was highest at low PC （P20）. This result revealed that the sweet corn growth was promoted by inoculating Arbuscular mycorrhizal and associated with the exogenous P concentration.

关 键 词：丛枝菌根真菌 磷水平 甜玉米 生长 

分 类 号：S513[农业科学—作物学]