scholarly journals Medicago truncatulaZinc-Iron Permease6 provides zinc to rhizobia-infected nodule cells

2017 ◽  
Vol 40 (11) ◽  
pp. 2706-2719 ◽  
Author(s):  
Isidro Abreu ◽  
Ángela Saéz ◽  
Rosario Castro-Rodríguez ◽  
Viviana Escudero ◽  
Benjamín Rodríguez-Haas ◽  
...  
Keyword(s):  
Infected Nodule

The effect of white clover mosaic virus on nodulation of white clover (Trifolium repens L. cv. Ladino)

1980 ◽  
Vol 31 (2) ◽  
pp. 307 ◽  
Author(s):  
P Guy ◽  
A Gibbs ◽  
K Harrower
Keyword(s):  
Virus Infection ◽  
Mosaic Virus ◽  
White Clover ◽  
Trifolium Repens ◽  
Effective Strain ◽  
Plant Weight ◽  
Trifolium Repens L ◽  
White Clover Mosaic Virus ◽  
Infected Nodule ◽  
Mosaic Virus Infection

White clover mosaic virus infection of Ladino clover seedlings resulted in decreased plant weight and a 71 % decrease in the number of nodules per plant without the decrease in nodule size which is usually observed when legumes are virus-infected. Nodule numbers decreased both on plants nodulated with an effective strain and on those with an ineffective strain of Rhizobium.

scholarly journals Transcription of ENOD8 in Medicago truncatula Nodules Directs ENOD8 Esterase to Developing and Mature Symbiosomes

2008 ◽  
Vol 21 (4) ◽  
pp. 404-410 ◽  
Author(s):  
Laurent Coque ◽  
Purnima Neogi ◽  
Catalina Pislariu ◽  
Kimberly A. Wilson ◽  
Christina Catalano ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Medicago Truncatula ◽  
Sinorhizobium Meliloti ◽  
Immunoblot Analysis ◽  
Nodule Formation ◽  
Nitrogenous Compounds ◽  
Symbiosome Membrane ◽  
The Matrix ◽  
And Function ◽  
Infected Nodule

In Medicago truncatula nodules, the soil bacterium Sinorhizobium meliloti reduces atmospheric dinitrogen into nitrogenous compounds that the legume uses for its own growth. In nitrogen-fixing nodules, each infected cell contains symbiosomes, which include the rhizobial cell, the symbiosome membrane surrounding it, and the matrix between the bacterium and the symbiosome membrane, termed the symbiosome space. Here, we describe the localization of ENOD8, a nodule-specific esterase. The onset of ENOD8 expression occurs at 4 to 5 days postinoculation, before the genes that support the nitrogen fixation capabilities of the nodule. Expression of an ENOD8 promoter–gusA fusion in nodulated hairy roots of composite transformed M. truncatula plants indicated that ENOD8 is expressed from the proximal end of interzone II to III to the proximal end of the nodules. Confocal immunomicroscopy using an ENOD8-specific antibody showed that the ENOD8 protein was detected in the same zones. ENOD8 protein was localized in the symbiosome membrane or symbiosome space around the bacteroids in the infected nodule cells. Immunoblot analysis of fractionated symbiosomes strongly suggested that ENOD8 protein was found in the symbiosome membrane and symbiosome space, but not in the bacteroid. Determining the localization of ENOD8 protein in the symbiosome is a first step in understanding its role in symbiosome membrane and space during nodule formation and function.

scholarly journals Anatomy and ultrastructure of root nodules of Lupinus luteus

2015 ◽  
Vol 48 (1) ◽  
pp. 119-124
Author(s):  
A. Woźny ◽  
F. Młodzianowski
Keyword(s):  
Cell Nucleus ◽  
Root Nodules ◽  
Lupinus Luteus ◽  
Anatomic Structure ◽  
Anatomy And Ultrastructure ◽  
Infected Nodule ◽  
Polyphosphate Granules

The paper presents anatomic structure of root nodules of lupine (<i>Lupinus luteus</i> L. cv. Express) and ultrastructure of cells infected by <i>Rhizobium</i>, The inside of cells from the infected nodule region was filled with numerous bacteria; only centrally located cell nucleus was free of bacteria. Rhizobium was present mostly in the form of "transforming bacteria" (according to the terminology by Ching et al. 1977), characterized by visible nucleoid areas, numerous ribosomes, and polyphosphate granules, although typical bacterioids with poly-β-hydroxybutyrate were also found.

scholarly journals Medicago truncatula Natural Resistance-Associated Macrophage Protein1 Is Required for Iron Uptake by Rhizobia-Infected Nodule Cells

2015 ◽  
Vol 168 (1) ◽  
pp. 258-272 ◽  
Author(s):  
Manuel Tejada-Jiménez ◽  
Rosario Castro-Rodríguez ◽  
Igor Kryvoruchko ◽  
M. Mercedes Lucas ◽  
Michael Udvardi ◽  
...  
Keyword(s):  
Medicago Truncatula ◽  
Iron Uptake ◽  
Natural Resistance ◽  
Infected Nodule

The isolation of Frankia from nodules of Casuarina

1983 ◽  
Vol 61 (11) ◽  
pp. 2822-2825 ◽  
Author(s):  
H. G. Diem ◽  
Y. Dommergues
Keyword(s):  
Nutritional Requirements ◽  
Isolation Medium ◽  
Infected Nodule

Attempting to isolate Frankia from Casuarina, we found that this endophyte exhibited two unexpected characteristics: (i) an inability of most infected nodule cells to produce Frankia colonies; and (ii) the absence of specific nutritional requirements in the isolation medium. These findings led us to the formulation of some principles for isolating Frankia from Casuarina.

scholarly journals Medicago truncatulaZinc-Iron Permease6 provides zinc to rhizobia-infected nodule cells

2017 ◽  
Author(s):  
Isidro Abreu ◽  
Ángela Saéz ◽  
Rosario Castro-Rodríguez ◽  
Viviana Escudero ◽  
Benjamín Rodríguez-Haas ◽  
...  
Keyword(s):  
Symbiotic Nitrogen Fixation ◽  
Nitrogenase Activity ◽  
Zinc Transporters ◽  
Model Legume ◽  
Expression Levels ◽  
Growth Defects ◽  
Differentiation Zone ◽  
Infected Cells ◽  
Severe Growth ◽  
Infected Nodule

Abstract:Zinc is a micronutrient required for symbiotic nitrogen fixation. It has been proposed that in model legumeMedicago truncatula, zinc is delivered in a similar fashion as iron,i.e.by the root vasculature into the nodule and released in the infection/differentiation zone. There, zinc transporters must introduce this element into rhizobia-infected cells to metallate the apoproteins that use zinc as a cofactor.MtZIP6(Medtr4g083570) is aM. truncatulaZinc-Iron Permease (ZIP) that is expressed only in roots and nodules, with the highest expression levels in the infection/differentiation zone. Immunolocalization studies indicate that it is located in the plasma membrane of rhizobia-infected cells in the nodule. Down-regulatingMtZIP6expression levels with RNAi does not result in any strong phenotype when plants are being watered with mineral nitrogen. However, these silenced plants displayed severe growth defects when they depended on nitrogen fixed by their nodules, as a consequence of the loss of 80% of their nitrogenase activity. The reduction of this activity was not the result of iron not reaching the nodule, but an indirect effect of zinc being retained in the infection/differentiation zone and not reaching the cytosol of rhizobia-infected cells. These data are consistent with a model in which MtZIP6 would be responsible for zinc uptake by rhizobia-infected nodule cells in the infection/differentiation zone.

Dynamical Forensic Inference for Malware in IoT-Based Wireless Transmissions

2020 ◽  
pp. 51-79
Author(s):  
Rashmi Bhardwaj ◽  
Aashima Bangia
Keyword(s):  
Numerical Simulation ◽  
Sensor Node ◽  
Disease Model ◽  
Propagation Rate ◽  
Sensor Nodes ◽  
Trade Off ◽  
Defense Strategies ◽  
Fast Tracking ◽  
Infected Nodule

Mathematical models show the transmission of malware into internet of things (IoT)-based wireless-grid through a disease model in which the sensor nodes are affected and cause crashes and various harms. The harmful nodes either become transmitters of e-worms or completely get destroyed. E-worms approaching the sensor node undergo a trade-off which requires fast-tracking the velocity of its spread utilizing larger transmission ranges, which occurs through strenuous use of the battery, implying the reduced overall infection propagation rate in the long-term, which is equivalent to destroying the infected nodule to wreak huge costs on the setup, which happens at the price of dropping the chance of contaminating new vulnerable nodes in the future. The numerical simulation using Lyapunov exponents, entropy for ascertaining intellectual defense strategies, could restrict the harm through suitably choosing network parameters.

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