24 Result(s)

Article

Receptive to infection

EPR3, a plant protein, is found to act as a probable receptor for exopolysaccharide molecules that surround the plant's symbiotic bacteria. The advance sheds light on how recognition is governed in symbiotic r...

Sharon R. Long in Nature (2015)

Chapter and Conference Paper

Activation and Perception of Calcium Oscillations During Nod Factor Signalling

Cynthia Gleason, Raka Mitra, Péter Kaló… in Biological Nitrogen Fixation, Sustainable … (2005)

Article

Heterologous expression to assay for plant lectins or receptors

Heterologous expression of genes for membrane proteins can provide a useful approach to analyze ligand binding and other cell surface characteristics. We analyzed the expression and processing of a barley lect...

Audrey M. Southwick, Sharon R. Long in Plant Molecular Biology Reporter (2002)

Article

Expression of the pea (Pisum sativum L.) α-tubulin gene TubA1 is correlated with cell division activity

Microtubules are thought to be major determinants of plant morphogenesis, through effects on planes of cell division and on directions of differential cell expansion. In differentiation and redifferentiation p...

Henrik U. Stotz, Sharon R. Long in Plant Molecular Biology (1999)

Article

The Pisum sativum TubA1 gene, a member of a small family of α-tubulin sequences

α- and β-tubulin proteins are subunits of microtubules, which as primary elements of the plant cytoskeleton play major roles in plant cell division and cell morphogenesis. Several higher-plant α- and β-tubulin...

Heidi L. Brierley, Philippa Webster, Sharon R. Long in Plant Molecular Biology (1995)

Chapter

Nodulation Gene Expression in Rhizobium Meliloti

We have used formal genetic analysis and molecular and biochemical approaches to understand the control of nodulation (nod)gene promoters by NodD 1 and NodD3, and to understand the role and control ofsyrM in the ...

Robert F. Fisher, Brenda Rushing, Joy Ogawa… in Advances in Molecular Genetics of Plant-Mi… (1994)

Chapter

Effects of Nod Factors on Alfalfa Root Hair Ca⁺⁺ and H⁺ Currents and on Cytoskeletal Behavior

In order to understand more about the early responses of alfalfa root hairs to nodulation factors, we used the nonintrusive ion-specific vibrating microelectrode [1,2] to determine the time course of calcium and ...

Nina S. Allen, Marty N. Bennett… in Advances in Molecular Genetics of Plant-Mi… (1994)

Article

Rhizobium–plant signal exchange

Initial stages in the Rhizobium–legume symbiosis can be thought of as a reciprocal molecular conversation: transmission of a gene inducer from legume host to bacterium, with ensuing bacterial synthesis of a morph...

Robert F. Fisher, Sharon R. Long in Nature (1992)

Article

ATP sulphurylase activity of the nodP and nodQ gene products of Rhizobium meliloti

THE symbiotic bacterium Rhizobium meliloti stimulates alfalfa (Medicago sativa L.) roots to undergo morphogenesis and form nitrogen-fixing nodules. It has been proposed that the bacterial genes nodABC, common to ...

Julie Schwedock, Sharon R. Long in Nature (1990)

Article

Rhizobium sweet-talking

Sharon R. Long, E. Morrey Atkinson in Nature (1990)

Chapter

Nodulation genetics: the plant-bacterial interface

The interaction of Rhizobium bacteria with legume nodules proceeds in a series of stages controlled by both bacteria and plant. The success of the interaction is dependent, at each of many stages, on compatibilit...

Sharon R. Long in Nitrogen Fixation (1990)

Article

New route to a sticky subject

Sharon R. Long, David W. Ehrhardt in Nature (1989)

Chapter and Conference Paper

Nodulation Genes and Their Regulation in Rhizobium Meliloti

Our long term goals are to study the interaction of Rhizobium and plants at the molecular and cellular levels. Our system of study is Rhizobium meliloti and its host plants such as alfalfa (Medicago sativa L.). T...

Sharon R. Long, Julie Schwedock… in Signal Molecules in Plants and Plant-Micro… (1989)

Chapter

The Role of Plant Compounds in the Regulation of Rhizobium Nodulation Genes

Members of the genus Rhizobium are soil bacteria capable of forming symbiotic nitrogen fixing nodules with leguminous plants. Individual species of bacteria have a defined host-range; they are able to form nodule...

N. Kent Peters, Sharon R. Long in Opportunities for Phytochemistry in Plant Biotechnology (1988)

Article

Microscopic studies of cell divisions induced in alfalfa roots by Rhizobium meliloti

We have used spot-inoculation and new cytological procedures to observe the earliest events stimulated in alfalfa (Medicago sativa L.) roots by Rhizobium meliloti. Roots were inoculated with 1–10 nl of concentrat...

Mark E. Dudley, Thomas W. Jacobs, Sharon R. Long in Planta (1987)

Chapter and Conference Paper

Consensus and Perspective on Rhizobium

The discussions on Rhizobium during the workshop provided us with a consensus on several important questions and pointed to new lines of research. However, it was clear that we lack fundamental knowledge of and t...

Sharon R. Long in Recognition in Microbe-Plant Symbiotic and Pathogenic Interactions (1986)

Chapter and Conference Paper

Genetic Analysis of Rhizobium-Plant Interactions

In approaching the question of plant-microbe recognition, we require studies at several levels. In addition, it is important to understand the many stages at which bacteria and plants interact. This is particu...

Sharon R. Long, N. Kent Peters… in Recognition in Microbe-Plant Symbiotic and… (1986)

Chapter

Fine Structure Studies of R. Meliloti nodDABC Genes

The ability of Rhizobium bacteria to invade plants and stimulate the host to develop nodules depends upon a series of genes, including the nodulation (nod) and host range (host specific nod) genes (Kondorosi et a...

Sharon R. Long, Thomas T. Egelhoff, Robert F. Fisher… in Nitrogen fixation research progress (1985)