scholarly journals Chloride Fluxes in Cells of the Isolated Root Cortex of Zea Mays

1973 ◽  
Vol 26 (4) ◽  
pp. 757 ◽  
Author(s):  
WJ Cram
Keyword(s):  
Zea Mays ◽  
Maize Root ◽  
Cortical Tissue ◽  
Cortical Cells ◽  
Root Cortex ◽  
Root Segments ◽  
Isolated Cortex ◽  
In Cells

Isolated maize root cortical tissue is used to eliminate stelar complications in measuring fluxes. Comparison of isolated cortex and whole root segments shows that the cortex is not damaged by separation from the stele, that the initial influx estimate of the plasmalemma influx in cortical cells of whole roots

scholarly journals Translational and Structural Requirements of the Early Nodulin Gene enod40, a Short-Open Reading Frame-Containing RNA, for Elicitation of a Cell-Specific Growth Response in the Alfalfa Root Cortex

2001 ◽  
Vol 21 (1) ◽  
pp. 354-366 ◽  
Author(s):  
Carolina Sousa ◽  
Christina Johansson ◽  
Celine Charon ◽  
Hamid Manyani ◽  
Christof Sautter ◽  
...  
Keyword(s):  
Amino Acids ◽  
Biological Activity ◽  
Rna Structure ◽  
Open Reading Frames ◽  
In Vitro Translation ◽  
Cortical Cells ◽  
Root Cortex ◽  
Reading Frame ◽  
Early Nodulin

ABSTRACT A diversity of mRNAs containing only short open reading frames (sORF-RNAs; encoding less than 30 amino acids) have been shown to be induced in growth and differentiation processes. The early nodulin geneenod40, coding for a 0.7-kb sORF-RNA, is expressed in the nodule primordium developing in the root cortex of leguminous plants after infection by symbiotic bacteria. Ballistic microtargeting of this gene into Medicago roots induced division of cortical cells. Translation of two sORFs (I and II, 13 and 27 amino acids, respectively) present in the conserved 5′ and 3′ regions ofenod40 was required for this biological activity. These sORFs may be translated in roots via a reinitiation mechanism. In vitro translation products starting from the ATG of sORF I were detectable by mutating enod40 to yield peptides larger than 38 amino acids. Deletion of a Medicago truncatula enod40 region between the sORFs, spanning a predicted RNA structure, did not affect their translation but resulted in significantly decreased biological activity. Our data reveal a complex regulation of enod40action, pointing to a role of sORF-encoded peptides and structured RNA signals in developmental processes involving sORF-RNAs.

scholarly journals Light and Decapitation Effects on in Vitro Rooting in Maize Root Segments

1985 ◽  
Vol 79 (2) ◽  
pp. 377-380 ◽  
Author(s):  
Franck W. Golaz ◽  
Paul-Emile Pilet
Keyword(s):  
In Vitro Rooting ◽  
Maize Root ◽  
Root Segments

scholarly journals Inhibition of Acid-Enhanced Elongation of Zea mays Root Segments by Galactose

1989 ◽  
Vol 90 (2) ◽  
pp. 440-444 ◽  
Author(s):  
Eiichi Tanimoto ◽  
Tom K. Scott ◽  
Yoshio Masuda
Keyword(s):  
Zea Mays ◽  
Root Segments

Transport and dynamics of molecules dissolved in maize root cortex membranes

1995 ◽  
Vol 143 (1) ◽  
Author(s):  
J. Svetek ◽  
V. Furtula ◽  
M. Nemec ◽  
E.A. Nothnagel ◽  
M. Schara
Keyword(s):  
Maize Root ◽  
Root Cortex

Identification of genes expressed in maize root cortical cells during lysigenous aerenchyma formation using laser microdissection and microarray analyses

2010 ◽  
Vol 190 (2) ◽  
pp. 351-368 ◽  
Author(s):  
Imene Rajhi ◽  
Takaki Yamauchi ◽  
Hirokazu Takahashi ◽  
Shunsaku Nishiuchi ◽  
Katsuhiro Shiono ◽  
...  
Keyword(s):  
Laser Microdissection ◽  
Maize Root ◽  
Cortical Cells ◽  
Aerenchyma Formation ◽  
Microarray Analyses

Ontogenèse des nodules caulinaires du Sesbania rostrata (légumineuses)

1984 ◽  
Vol 62 (5) ◽  
pp. 982-994 ◽  
Author(s):  
E. Duhoux
Keyword(s):  
Sesbania Rostrata ◽  
Cortical Cells ◽  
Root Cortex ◽  
Central Mass ◽  
Intracellular Release ◽  
Infection Threads ◽  
Bacterial Penetration ◽  
Infected Cells ◽  
Determinate Growth

Stem nodules of the legume Sesbania rostrata are ovoids, contain chlorophyll and have determinate growth. They possess a large central mass of infected cells. Stem mamillae are regularly arranged in vertical files along the stem and develop into nodules when they are infected by a specific Rhizobium. Each nodule arises from the development of an infected region of the incipient root cortex. The infection in S. rostrata has been shown to proceed in four sequential stages. Some of them have never been shown to occur in other legumes: (i) bacterial penetration takes place in degenerated (dead) cortical cells; (ii) proliferation of the bacteria occurs in the intercellular cavities and initiates a meristematic nodule; (iii) protusion of infection threads at first occurs intercellularly and then intracellularly from the cavities; (iv) finally there is an intracellular release of Rhizobia by an endocytotic process.

scholarly journals Nodulation of Aeschynomene afraspera and A. indica by Photosynthetic Bradyrhizobium Sp. Strain ORS285: The Nod-Dependent Versus the Nod-Independent Symbiotic Interaction

2011 ◽  
Vol 24 (11) ◽  
pp. 1359-1371 ◽  
Author(s):  
Katia Bonaldi ◽  
Daniel Gargani ◽  
Yves Prin ◽  
Joel Fardoux ◽  
Djamel Gully ◽  
...  
Keyword(s):  
Fluorescent Protein ◽  
Lateral Roots ◽  
Root Hairs ◽  
Infection Process ◽  
Cortical Cells ◽  
Symbiotic Interaction ◽  
Root Cortex ◽  
Bradyrhizobium Sp ◽  
Infected Cells ◽  
Green Fluorescent

Here, we present a comparative analysis of the nodulation processes of Aeschynomene afraspera and A. indica that differ in their requirement for Nod factors (NF) to initiate symbiosis with photosynthetic bradyrhizobia. The infection process and nodule organogenesis was examined using the green fluorescent protein–labeled Bradyrhizobium sp. strain ORS285 able to nodulate both species. In A. indica, when the NF-independent strategy is used, bacteria penetrated the root intercellularly between axillary root hairs and invaded the subepidermal cortical cells by invagination of the host cell wall. Whereas the first infected cortical cells collapsed, the infected ones immediately beneath kept their integrity and divided repeatedly to form the nodule. In A. afraspera, when the NF-dependent strategy is used, bacteria entered the plant through epidermal fissures generated by the emergence of lateral roots and spread deeper intercellularly in the root cortex, infecting some cortical cells during their progression. Whereas the infected cells of the lower cortical layers divided rapidly to form the nodule, the infected cells of the upper layers gave rise to an outgrowth in which the bacteria remained enclosed in large tubular structures. Together, two distinct modes of infection and nodule organogenesis coexist in Aeschynomene legumes, each displaying original features.

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