| phosphorus nutrition-mediated effects of arbuscular mycorrhiza on leaf morphology and carbon allocation in perennial ryegrass. | the aim of this work was to disentangle phosphorus status-dependent and -independent effects of arbuscular mycorrhizal fungus (amf) on leaf morphology and carbon allocation in perennial ryegrass (lolium perenne). to this end, we assessed the p-response function of morphological components in mycorrhizal and nonmycorrhizal plants of similar size. amf (glomus hoi) stimulated relative p-uptake rate, decreased leaf mass per area (lma), and increased shoot mass ratio at low p supply. lower lma was ca ... | 2005 | 16219082 |
| phosphorus nutrition and mycorrhiza effects on grass leaf growth. p status- and size-mediated effects on growth zone kinematics. | this study tested whether leaf elongation rate (ler, mm h(-1)) and its components--average relative elemental growth rate (regravg, mm mm(-1) h(-1)) and leaf growth zone length (l(lgz), mm)--are related to phosphorus (p) concentration in the growth zone (p(lgz) mg p g(-1) tissue water) of lolium perenne l. cv. condesa and whether such relationships are modified by the arbuscular mycorrhizal fungus (amf) glomus hoi. mycorrhizal and non-mycorrhizal plants were grown at a range of p supply rates an ... | 2006 | 17080603 |
| arbuscular mycorrhizal colonization on carbon economy in perennial ryegrass: quantification by 13co2/12co2 steady-state labelling and gas exchange. | effects of the arbuscular mycorrhizal fungus (amf) glomus hoi on the carbon economy of perennial ryegrass (lolium perenne) were investigated by comparing nonmycorrhizal and mycorrhizal plants of the same size, morphology and phosphorus status. plants were grown in the presence of co2 sources with different c isotope composition (delta13c -1 or -44). relative respiration and gross photosynthesis rates, and belowground allocation of c assimilated during one light period ('new c'), as well as its c ... | 2006 | 17083684 |
| rutaceae sampled from germany, malta, and mallorca (spain) are associated with amf clustering with glomus hoi berch & trappe. | six rutaceae species collected from natural habitats (malta, mallorca (spain), and tenerife (spain)) and the botanical garden in marburg were examined with respect to mycorrhizal structures and fungal identity. all species have the same gross colonization pattern of arbuscular mycorrhiza (am) with distinct intracellular and intercellular phases but show remarkable differences in details, especially in terms of the extent of the intracellular phase. the associated am fungi, identified using molec ... | 2008 | 18543007 |
| arbuscular mycorrhizal fungi can transfer substantial amounts of nitrogen to their host plant from organic material. | nitrogen (n) capture by arbuscular mycorrhizal (am) fungi from organic material is a recently discovered phenomenon. this study investigated the ability of two glomus species to transfer n from organic material to host plants and examined whether the ability to capture n is related to fungal hyphal growth. experimental microcosms had two compartments; these contained either a single plant of plantago lanceolata inoculated with glomus hoi or glomus intraradices, or a patch of dried shoot material ... | 2009 | 18811615 |
| diversity and functionality of arbuscular mycorrhizal fungi in three plant communities in semiarid grasslands national park, canada. | septate endophytes proliferating in the roots of grasslands' plants shed doubts on the importance of arbuscular mycorrhizal (am) symbioses in dry soils. the functionality and diversity of the am symbioses formed in four replicates of three adjacent plant communities (agricultural, native, and restored) in grasslands national park, canada were assessed in periods of moisture sufficiency and deficiency typical of early and late summer in the region. the community structure of am fungi, as determin ... | 2010 | 20082070 |
| substantial nitrogen acquisition by arbuscular mycorrhizal fungi from organic material has implications for n cycling. | arbuscular mycorrhizal (am) fungi are obligate biotrophs that acquire carbon (c) solely from host plants. am fungi can proliferate hyphae in, and acquire nitrogen (n) from, organic matter. although they can transfer some of that n to plants, we tested the hypothesis that organic matter is an important n source for the am fungi themselves. we grew pairs of plants with and without the am fungus glomus hoi in microcosms that allowed only the fungus access to a 15n/13c-labeled organic patch; in some ... | 2010 | 20631302 |
| interactions between an arbuscular mycorrhizal fungus and a soil microbial community mediating litter decomposition. | we investigated arbuscular mycorrhizal fungi (amf) alteration of microbial mediation of litter decomposition. amf (glomus hoi) were either allowed access to or excluded from plantago lanceolata l. root litter embedded in soil; litter was labeled with either (13) c only or (13) c and (15) n. plant n uptake was significantly increased if amf accessed the litter, and (15) n analysis of the plant material indicated that 2-3% of plant n originated from litter. succession of the soil community mediati ... | 2012 | 22224699 |