A5004889056- Mycorrhizal Fungi and Plant Interactions
- Turfgrass Adaptation and Management
- Legume Nitrogen Fixing Symbiosis
- Soil Carbon and Nitrogen Dynamics
- Wastewater Treatment and Nitrogen Removal
- Plant Parasitism and Resistance
- Rangeland and Wildlife Management
- Plant nutrient uptake and metabolism
- Seedling growth and survival studies
- Plant and fungal interactions
- Remote Sensing in Agriculture
- Soil and Water Nutrient Dynamics
- Microbial Community Ecology and Physiology
- Plant and Fungal Species Descriptions
- Agriculture, Soil, Plant Science
- Plant Pathogens and Fungal Diseases
- Plant and Fungal Interactions Research
- Plant Virus Research Studies
- Weed Control and Herbicide Applications
- Horticultural and Viticultural Research
- Plant Disease Management Techniques
- Land Use and Ecosystem Services
- Light effects on plants
- Botany, Ecology, and Taxonomy Studies
- Urban Heat Island Mitigation
The Ohio State University
2023-2024
University of Minnesota
2015-2023
University of Minnesota System
2021
Biotechnology Institute
2015-2018
Ithaca College
2010-2015
Cornell University
2010-2015
University of Fribourg
2008-2014
Unité de Recherche Œnologie
2005
UMR BIOdiversity, GEnes & Communities
2005
Most terrestrial plants form arbuscular mycorrhiza (AM), mutualistic associations with soil fungi of the order Glomeromycota. The obligate biotrophic trade mineral nutrients, mainly phosphate (Pi), for carbohydrates from plants. Under conditions high exogenous supply, when plant can meet its own P requirements without fungus, AM are suppressed, an effect which could be interpreted as active strategy to limit carbohydrate consumption fungus by inhibiting proliferation in roots. However,...
Phosphorus and nitrogen are essential nutrient elements that needed by plants in large amounts. The arbuscular mycorrhizal symbiosis between soil fungi improves phosphorus acquisition under limiting conditions. On the other hand, these nutrients influence root colonization symbiotic functioning. This represents a feedback mechanism allows to control fungal symbiont depending on requirements supply. Elevated supply has previously been shown exert strong inhibition of development. Here, we...
During arbuscular mycorrhizal (AM) symbiosis, the plant gains access to phosphate (Pi) and nitrogen delivered by its fungal symbiont. Transfer of mineral nutrients occurs at interface between branched hyphae called arbuscules root cortical cells. In Medicago truncatula, a Pi transporter, PT4, is required for symbiotic transport, in pt4, transport fails, degenerate prematurely, symbiosis not maintained. Premature arbuscule degeneration (PAD) suppressed when pt4 mutants are nitrogen-deprived,...
Abstract Better understanding of process controls over nitrous oxide (N 2 O) production in urine-impacted ‘hot spots’ and fertilizer bands is needed to improve mitigation strategies emission models. Following amendment with bovine ( Bos taurus ) urine (Bu) or urea (Ur), we measured inorganic N, pH, N O genes associated nitrification two soils (‘ L ’ ‘ W ’) having similar texture, C C/N ratio. Solution-phase ammonia sl NH 3 was also calculated accounting for non-linear ammonium (NH 4 +...
Plants acquire essential mineral nutrients such as phosphorus (P) and nitrogen (N) directly from the soil, but majority of vascular plants also gain access to these through endosymbiotic associations with arbuscular mycorrhizal (AM) fungi. In AM symbiosis, fungi deliver P N root branched hyphae called arbuscules. Previously we identified MtPT4, a Medicago truncatula phosphate transporter located in periarbuscular membrane that is for symbiotic transport maintenance symbiosis. mtpt4 mutants...
Application of nitrogen (N) fertilizers, predominantly as urea, is a major source reactive N in the environment, with wide ranging effects including increased greenhouse gas accumulation atmosphere and aquatic eutrophication. The soil microbial community principal driver cycling; thus, improved understanding responses to urea addition has widespread implications. We used next-generation amplicon sequencing 16S rRNA gene characterize bacterial archaeal communities eight contrasting...
Neutral density shade cloth is commonly used for simulating foliar shade, in which it reduces light intensity without altering spectral quality. However, also alters quality, reducing the ratio of red to far-red (R:FR) light, blue green (B:G) and ultraviolet light. Unlike cloth, photoselective filters can alter but previous literature have not simulated well. We examined quality sunlight under color temperature (CTB), plus (PG), neutral (ND) from LEE Filters, Rosco e-colour + Cinegel brands...
Abstract Weed suppression has been observed in the fine fescues, a group of low‐input turfgrasses. Of Chewings fescue ( Festuca rubra L. ssp. commutata Gaudin; CH) and strong creeping red F. ST) displayed strongest weed ability previous research while hard brevipila Tracey; HF) did not appear to have same level suppression. However, most this occurred more than 10 years ago lead improved cultivars. There is need for confirmation these results using diverse germplasm that may genetic...
Abstract Increasing temperatures associated with climate change will be the next challenge for crop improvement, especially turfgrass species that are often grown in urban green spaces. Previous research on heat stress tolerance has been limited to a small number of and cultivars different conditions between studies; therefore, we assessed 34 turfgrasses representing 14 species. Four replicates each entry were established at least 12 wk then subjected 49 d (35/25 °C day/night) followed by 4...
Consumers often have multiple choices when purchasing retail lawn products in stores. In this study, we evaluated the acute drought performance of locally available seed (mixtures or blends) at two mowing heights 2.5 and 3 inches. We hypothesized that species present height-of-cut differentially influence resistance recovery mixtures blends. Fall 2016 2017, 28 different consisting 25 blends turfgrass seeds were established under a fully automated rainout shelter St. Paul campus University...
Abstract Turfgrass seeds are often sold as mixtures of several species to increase the probability positive responses toward abiotic and biotic stresses, a response drought being one these. Several turfgrass already thought be better suited for drought, such hard fescue ( Festuca brevipila Tracey) tall [ Schedonorus arundinaceus (Schreb.) Dumort]. However, little is known about benefit these in with drought‐intolerant and/or drought‐avoiding during drought. Understanding mixture composition...
Abstract Hard fescue is an allo‐hexaploid, caespitose, cool‐season grass that part of the fine‐leaved ovina complex Lolium – Festuca clade in Poaceae. It predominantly used as a low‐maintenance turfgrass and soil stabilization situations with reduced inputs nitrogen water. While often recommended for use under tree canopies, prolonged foliar shade can thin turf stands reduce their functionality; furthermore, gray snow mold caused by Typhula incarnata further affect hard functionality. In...
Abstract Turfgrass stakeholder surveys have indicated fine fescue ( Festuca spp.) seed will become in higher demand, but production the United States, especially Oregon, has not increased. Northern Minnesota is conducive for cool‐season turfgrass and existing infrastructure to produce seed. There an exciting opportunity Minnesotan farmers increase revenue by producing seed; however, fescues require a growing season establishment prior production, economic crop during first needed. Most are...
Abstract Background Neutral density shade cloth is commonly used for simulating foliar shade, in which it reduces light intensity without altering spectral quality. However, also alters quality, reducing the ratio of red to far-red (R:FR) and blue green (B:G) light. Unlike cloth, photoselective filters can alter but have not simulated well. We examined quality sunlight under color temperature (CTB), plus (PG), neutral (ND) from LEE Filters, Rosco e-colour+, Cinegel brands either alone or...