A5040963569- Mycorrhizal Fungi and Plant Interactions
- Soil Carbon and Nitrogen Dynamics
- Forest Ecology and Biodiversity Studies
- Ecology and Vegetation Dynamics Studies
- Plant and animal studies
- Plant Parasitism and Resistance
- Legume Nitrogen Fixing Symbiosis
- Plant nutrient uptake and metabolism
- Agronomic Practices and Intercropping Systems
- Plant Pathogens and Fungal Diseases
- Fungal Biology and Applications
- Plant and fungal interactions
- Lichen and fungal ecology
- Plant Water Relations and Carbon Dynamics
- Soil and Water Nutrient Dynamics
- Seedling growth and survival studies
- Gut microbiota and health
- Plant tissue culture and regeneration
- Fire effects on ecosystems
- Biocrusts and Microbial Ecology
- Nematode management and characterization studies
- Plant Reproductive Biology
- Peatlands and Wetlands Ecology
- Plant and Fungal Species Descriptions
- Crop Yield and Soil Fertility
Brigham Young University
2015-2024
Pennsylvania State University
2008-2020
John Wiley & Sons (United States)
2016
Ecological Society of America
2016
Intercollege
2008
Rockefeller Foundation
1995
New Mexico State University
1990
Stanford University
1987
University of California, Berkeley
1985
Non—native annual grasses dominate most Californian mediterranean—climate grasslands today. However, native grassland flora persists in on serpentine—derived soils. We manipulated soil nutrient resources to explore the links between availability, plant productivity, and relative abundances of non—native species serpentine grassland. Factorial combinations nitrogen, phosphorus, other components a nutritionally complete formula were added field plots over two growing seasons. Fertilization...
summary One of the most dramatic effects infection by vesicular‐arbuscular mycorrhizal fungi on physiology host plant is an increase in phosphorus absorption. When limiting, maximum extent to which can improve performance thus predicted be a function deficit plant, difference between demand and supply. Phosphorus defined as rate absorption that would result optimum measured growth rate, reproduction or fitness. The supply actual under prevailing conditions. Variation among taxa...
• Niche differentiation for different soil substrates has been proposed as a mechanism contributing to ectomycorrhizal fungal diversity. This hypothesis largely untestable because of lack techniques study the in situ distribution hyphae. We developed technique involving DNA extraction, PCR and terminal restriction fragment length polymorphism (T-RFLP) analysis species identification investigate vertical hyphae four distinct layers forest floor (lower litter, F-layer, H-layer, B-horizon)...
Summary Metacommunity and neutral theory have reinvigorated the study of ‘niches’ emphasized importance understanding influences competition, abiotic factors regional spatial processes in shaping communities. We conducted a field survey to examine effects soil characteristics distance on arbuscular mycorrhizal (AM) fungal communities maize ( Zea mays ) sand clay soils. To address whether distributions AM species represented their fundamental or realized niches, we grew representative two...
Summary The identification of plant functional traits that can be linked to ecosystem processes is wide interest, especially for predicting vegetational responses climate change. Root diameter the finest absorptive roots may one trait has significance. Do species with relatively thick forage in nutrient‐rich patches differently from fine roots? We measured related nutrient foraging (root morphology and architecture, root proliferation, mycorrhizal colonization) across six coexisting...
Significance Plant growth requires acquisition of soil nutrients in a patchy environment. Nutrient patches may be actively foraged by symbioses comprising roots and mycorrhizal fungi. Here, we show that thicker root tree species (e.g., tulip poplar, pine) respond weakly or not at all to nutrient heterogeneity. In contrast, thinner readily selectively growing [arbuscular trees maple)] fungal hyphae [ectomycorrhizal oak)] nutrient-rich “hotspots.” Our results thus indicate predictable patterns...
Summary In most cases, both roots and mycorrhizal fungi are needed for plant nutrient foraging. Frequently, the colonization of by arbuscular ( AM ) seems to be greater in species with thick sparsely branched than thin densely roots. Yet, whether a complementarity exists between across these two types root system remains unclear. We measured traits related foraging (root morphology, architecture proliferation, extramatrical hyphal length) 14 coexisting subtropical tree following pruning...
Phosphorus (P) for carbon (C) exchange is the pivotal function of arbuscular mycorrhiza (AM), but how this varies with soil P availability and among co-occurring plants in complex communities still largely unknown. We collected intact plant two regions differing c. 10-fold labile inorganic P. After a 2-month glasshouse incubation, we measured
Organic phosphorus sources make up a large fraction of the total P in some soils. Vesicular–arbuscular mycorrhizal fungi provide surface area for absorption inorganic P. The question whether or not they have direct access to organic by producing extracellular phosphatases has hitherto been controversial because experiments had performed absence other soil microorganisms. We used split‐dish vitro carrot mycorrhiza system free from contaminating extraradical hyphae Glomus intraradices...
The biology of symbiosis , کتابخانه مرکزی دانشگاه علوم پزشکی تهران
SUMMARY Sunflower ( Helianthus animus L.) and mustard Brassica hirta Moench.) plants were grown in autoclaved soil to which was added various components of inoculum. Use inocula containing mycorrhizal propagules ultimately resulted growth promotions related improved phosphorus nutrition. Inoculation with caused an initial depression comparison receiving no inoculation, but inoculation washed spores did not. For several reasons, the by not attributable infection. First, evident before...
Established plants may facilitate the regeneration of closely related seedlings if they increase populations mutualistic symbionts that would otherwise be limiting. In this study we examined influence ectomycorrhizal and vesicular-arbuscular mycorrhizal (VAM) trees on Quercus rubra to determine how infection, nutrient uptake, growth seedlings. two experiments, planted Q. acorns adjacent stump sprouts montana (=Near-Quercus) Acer rubrum (=Near-Acer), and, in second experiment, near spp....
Crop loss due to soil salinization is an increasing threat agriculture worldwide. This review provides overview of cellular and physiological mechanisms in plant responses salt. We place a time- tissue-dependent context ...Read More
The roots of the majority tree species are associated with either arbuscular mycorrhizal (AM) or ectomycorrhizal (EM) fungi. absorptive also vary widely in their diameter. linkages between root thickness, mycorrhiza type and nutrient foraging poorly understood. We conducted a large ingrowth experiment field to investigate how varying thickness fungi (AM vs. EM) exploit different patches (inorganic organic) common garden. In nutrient-rich patches, thin-root more effectively proliferated than...