Stephen R. Shafer

Works (23)

Updated: August 1st, 2023 21:17

2001 journal article

In vitro colonization of micropropagated Pieris floribunda by ericoid mycorrhizae. II. Effects on acclimatization and growth

HortScience, 36(2), 357–359.

By: M. Starrett, F. Blazich, S. Shafer & L. Grand

Source: NC State University Libraries
Added: August 6, 2018

2001 journal article

In vitro colonization of micropropagated Pieris floribunda byericoid mycorrhizae. I. Establishment of mycorrhizae onmicroshoots

HortScience, 36(2), 353–356.

By: M. Starrett, F. Blazich, S. Shafer & L. Grand

Source: NC State University Libraries
Added: August 6, 2018

2000 journal article

A conceptual model and indicators for assessing the ecological condition of agricultural lands

JOURNAL OF ENVIRONMENTAL QUALITY, 29(3), 728–737.

By: G. Hess n, C. Campbell*, D. Fiscus*, A. Hellkamp*, B. McQuaid*, M. Munster*, S. Peck*, . Shafer *

UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2000 journal article

Assessment of the condition of agricultural lands in six mid-Atlantic states

JOURNAL OF ENVIRONMENTAL QUALITY, 29(3), 795–804.

By: A. Hellkamp n, J. Bay*, C. Campbell n, K. Easterling*, D. Fiscus*, G. Hess*, B. McQuaid*, M. Munster* ...

UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science; OpenAlex)
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2000 journal article

Carbon dioxide enrichment and nitrogen fertilization effects on cotton (Gossypium hirsutum L.) plant residue chemistry and decomposition

PLANT AND SOIL, 220(1-2), 89–98.

By: F. Booker*, . Shafer, C. Wei & S. Horton*

author keywords: carbohydrates; CO2; lignin; nitrogen; proanthocyanidins; soil respiration
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2000 journal article

Induction and/or selection of phenolic acid-utilizing bulk-soil and rhizosphere bacteria and their influence on phenolic acid phytotoxicity

JOURNAL OF CHEMICAL ECOLOGY, 26(9), 2059–2078.

By: U. Blum n , K. Staman  n, L. Flint & . Shafer *

author keywords: allelopathy; bulk-soil and rhizosphere bacteria; Cucumis; phenolic acid mixtures; phytotoxicity
TL;DR: There were significant inverse relationships between PAU bacteria in the rhizosphere of cucumber seedlings and absolute rates of leaf expansion and/or shoot biomass and this is the first time that such a relationship has been quantified. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
15. Life on Land (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

1999 journal article

Evidence for inhibitory allelopathic interactions involving phenolic acids in field soils: Concepts vs. an experimental model

Critical Reviews in Plant Sciences, 18(5), 673–693.

By: U. Blum n , S. Shafer* & M. Lehman*

UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
15. Life on Land (Web of Science; OpenAlex)
Sources: NC State University Libraries, NC State University Libraries
Added: August 6, 2018

1999 chapter

The fates and effects of phenolic acids in a plant-microbe-soil model system

In J. G. C. G. F. A. Macias, J. M. G. Molinillo, & H. Cutler (Eds.), Recent advances in allelopathy: I. A. science for the future (pp. 159–166). Cadiz, Spain: Servicio de Publicaciones, Universidad de Cadiz.

By: U. Blum , M. Austin & S. Shafer

Ed(s): J. F. A. Macias, J. Molinillo & H. Cutler

Source: NC State University Libraries
Added: August 6, 2018

1998 article

Assessment of the condition of agricultural lands in five mid-Atlantic states

Hellkamp, A. S., Shafer, SR, Campbell, C. L., Bay, J. M., Fiscus, D. A., Hess, G. R., … Tooley, M. B. (1998, June). ENVIRONMENTAL MONITORING AND ASSESSMENT, Vol. 51, pp. 317–324.

By: A. Hellkamp n, . Shafer  n, C. Campbell n, J. Bay n, D. Fiscus n, G. Hess n, B. McQuaid n, M. Munster n ...

UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science; OpenAlex)
13. Climate Action (Web of Science)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1998 journal article

Biomass of tomato seedlings exposed to an allelopathic phenolic acid and enriched atmospheric carbon dioxide

WATER AIR AND SOIL POLLUTION, 106(1-2), 123–136.

By: . Shafer  n, U. Blum n , S. Horton n & D. Hesterberg n 

Contributors: S. Shafer n, U. Blum n , S. Horton n & D. Hesterberg n 

author keywords: global change; community ecology; interference
TL;DR: Results suggest that if CO2 affects plant competition, mechanisms involving allelopathic phenolic acids may not be involved, and twice-ambient CO2 significantly increased the y-intercept for the dose-response model for the p-coumaric acid effect on shoot biomass but had negligible effects on other aspects of the models. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
15. Life on Land (Web of Science)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

1997 journal article

Influence of a mycorrhizal fungus and/or rhizobium on growth and biomass partitioning of subterranean clover exposed to ozone

WATER AIR AND SOIL POLLUTION, 96(1-4), 233–248.

By: J. Miller n, . Shafer, M. Schoeneberger, W. Pursley, S. Horton & C. Davey

author keywords: rhizobia; VAM
TL;DR: The mycorrhizal fungus is such a significant C drain that even a small amount of O3 stress suppresses plant growth under these conditions, and Statistically significant interactions occurred between O3 and inoculum types for shoot and total biomass. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1993 journal article

ANALYSIS OF OZONE CONCENTRATION - BIOMASS RESPONSE RELATIONSHIPS AMONG OPEN-POLLINATED FAMILIES OF LOBLOLLY-PINE

CANADIAN JOURNAL OF FOREST RESEARCH, 23(4), 706–715.

By: . Shafer, R. Reinert, G. Eason & S. Spruill

TL;DR: Ozone concentration–response relationships were quantified for open-pollinated families of loblolly pine (Pinustaeda L.) seedlings and the maximum suppression of any biomass variable predicted by a regression model for plants exposed for 12 weeks to 320 nL/L was 25% for total dry weight. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1992 journal article

INTERACTIONS OF SIMULATED ACIDIC RAIN WITH ROOT-KNOT OR CYST NEMATODES ON SOYBEAN

PHYTOPATHOLOGY, 82(9), 962–970.

By: . Shafer, . Koenning & K. Barker

author keywords: ACID DEPOSITION; ACID PRECIPITATION; BRADYRHIZOBIUM-JAPONICUM; NODULATION; POLLUTANT-PARASITE INTERACTION
TL;DR: The influence of simulated acidic rain on interactions of root-knot (Meloidogyne hapla, M. incognita) or cyst (Heterodera glycines) nematodes with soybean plants was investigated in greenhouse experiments. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1992 journal article

RESPONSES OF MICROBIAL-POPULATIONS IN THE RHIZOSPHERE TO DEPOSITION OF SIMULATED ACIDIC RAIN ONTO FOLIAGE AND OR SOIL

ENVIRONMENTAL POLLUTION, 76(3), 267–278.

By: . Shafer  n

UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
15. Life on Land (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1991 journal article

A role for plant pathologists in global climate change research

Plant Disease, 75(5), 437.

By: R. Bruck & S. Shafer

Source: NC State University Libraries
Added: August 6, 2018

1991 journal article

INFLUENCE OF PHENOLIC-ACIDS ON MICROBIAL-POPULATIONS IN THE RHIZOSPHERE OF CUCUMBER

JOURNAL OF CHEMICAL ECOLOGY, 17(2), 369–389.

By: . Shafer * & U. Blum  n

author keywords: ALLELOPATHY; FERULIC ACID; P-COURMARIC ACID; VANILLIC ACID; CUCUMIS-SATIVUS; BACTERIA; FUNGI
TL;DR: Increases suggested that chronic exposure to a phenolic acid might resuit in high populations of rhizosphere microorganisms that could metabolize the compounds and thus alter observable responses by the plant. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science; OpenAlex)
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1991 journal article

MYCORRHIZAL MEDIATION OF PLANT-RESPONSE TO ATMOSPHERIC CHANGE - AIR-QUALITY CONCEPTS AND RESEARCH CONSIDERATIONS

ENVIRONMENTAL POLLUTION, 73(3-4), 163–177.

By: . Shafer  n & M. Schoeneberger*

TL;DR: The role of mycorrhizae in mediating plant responses to atmospheric change may be an important consideration in predicting effects of atmospheric changes on plants in managed and natural ecosystems. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1989 journal article

GROWTH-RESPONSES OF FIELD-GROWN LOBLOLLY-PINE TO CHRONIC DOSES OF OZONE DURING MULTIPLE GROWING SEASONS

CANADIAN JOURNAL OF FOREST RESEARCH, 19(7), 821–831.

By: . Shafer & A. Heagle

TL;DR: Ozone suppressed stem height, root collar diameter, total branch length, and (or) dry weights of above-ground parts of plants in three families, but response to ozone depended upon dose, family, and the plant part measured. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1985 journal article

FORMATION OF ECTOMYCORRHIZAE ON PINUS-TAEDA SEEDLINGS EXPOSED TO SIMULATED ACIDIC RAIN

CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE, 15(1), 66–71.

By: . Shafer, L. Grand*, R. Bruck* & A. Heagle*

TL;DR: Responses of ecetomycorrhiza formation and associated shoot growth to acidity of simulated rains suggest that rains of intermediate acidity (pH 4.0 and 3.2) inhibited ectomycorRhiza formation, or that increased soil acidity or other factors induced by rains at pH 2.4 enhanced ectomy Corrhizae formation. (via Semantic Scholar)
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
15. Life on Land (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1985 journal article

INFLUENCE OF SIMULATED ACIDIC RAIN ON PHYTOPHTHORA-CINNAMOMI AND PHYTOPHTHORA ROOT-ROT OF BLUE LUPINE

PHYTOPATHOLOGY, 75(9), 996–1003.

By: . Shafer, R. Bruck & A. Heagle

UN Sustainable Development Goal Categories
2. Zero Hunger (OpenAlex)
13. Climate Action (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1983 chapter

Effects of acidic precipitation on air-borne, soil-borne pathogens and mycorrhizal symbionts of forest trees

In Acid rain and forest resources (pp. 91–109). Washington, DC: USDA.

By: R. Bruck & S. Shafer

Source: NC State University Libraries
Added: August 6, 2018

1983 chapter

Effects of acidic precipitation on plant diseases

In Effects of acidic deposition on terrestrial ecosystems (pp. 19–32). Ann Arbor, MI: Ann Arbor Press.

By: R. Bruck & S. Shafer

Source: NC State University Libraries
Added: August 6, 2018

1982 chapter

Effects of simulated acid precipitation on foliar and root diseases of forest trees

In EPA Acidic Deposition Ecological Effects Research Peer Review (pp. 67–76).

By: R. Bruck, A. Heagle & S. Shafer

Source: NC State University Libraries
Added: August 6, 2018

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