Effects of Glomus mosseae strains of different origin on plant macro- and micronutrient uptake in Cd-polluted and unpolluted soils

Abstract

In the present study, changes in the infectivity and effectiveness of four Glomus mosseae strains of different origin were investigated in calcareous loamy chernozem soils treated with Cd at three levels (0, 50, 100 mg Cd kg −1 ) in a pot experiment. Frequency of infection (F%), arbuscular richness (a%) and shoot dry matter, macro-(N, P, K, S, Ca, Mg) and microelements (Zn, Cu, Ni, Mn, Mo, Co) and the Cd content of the host plants were compared to determine whether there was any variability in infectivity and effectiveness between G. mosseae strains of different origin. Functional diversity was found in the infectivity and effectiveness of the studied G. mosseae strains. In Cd-treated soil, AMF inoculation was beneficial to the plant growth, P uptake and shoot Cd content of the host. However, the higher uptake of other macro- and microelements was noted for non-mycorrhizal plants compared to mycorrhizal plants. The lower shoot content of some elements did not cause nutrient deficiency in mycorrhizal plants. The present results support the hypothesis that in polluted soils, the development of mycorrhizal symbiosis has the potential for AMF to protect their hosts against Cd toxicity rather than to improve nutrient uptake.

Changes of Parameters of Infectivity and Efficiency of DifferentGlomus mosseaeArbuscular Mycorrhizal Fungi Strains in Cadmium‐Loaded Soils

“…Values of A% showed greater differences among the five Glomus mosseae strains of different origin. In contrast to our earlier results (Biró and Taká cs 2007), arbuscular richness of G. mosseae (M) isolated from metal-polluted soil was not affected significantly by the increasing rate of soil Cd content and showed similar and high values of A% in the different sampling times 230 I. Biró, T. Németh, and T. Takács *Concentrations are less than detection limit. Detection limit for Cd: 0.02 mg kg 21 .…”

“…In agreement with previous observations (Chen et al 2004;Biró and Taká cs 2007), we noted enhanced biomass production of AM plants in response to AMF colonization. However, the increasing Cd concentration of soils decreased the shoot dry matter of 11-and 20-week-old plants ( Table 2).…”

“…Shoot N contents (%) of 20-week-old mycorrhizal plants often are reduced compared with control plants. There is little evidence for macronutrient cation uptake by AM plants (Clark and Zeto 2000), particularly in HM-contaminated soils (Biró and Taká cs 2007). We found significantly lower shoot potassium (K) content in mycorrhizal plants; their shoot K content also reduced in time (Table 3).…”

“…However, phylum Glomeromycota has few members. There are only about 160 described species worldwide, but to date, only a few studies (Munkvold et al 2004;Biró and Taká cs 2007) investigated the importance of intraspecific functional diversity of AMF. Glomus mosseae generally occurs in nature and agroecosystems.…”

Evolutionary criteria outperform operational approaches in producing ecologically relevant fungal species inventories

“…(2004). Functional variation in nutrient uptake and response to heavy metal contamination was observed among isolates of Glomus mosseae (Biró & Takács 2007; Biró et al. 2009).…”