scholarly journals Sucrose Starvation Induces Microautophagy in Plant Root Cells

2019 ◽  
Vol 10 ◽  
Author(s):  
Shino Goto-Yamada ◽  
Kazusato Oikawa ◽  
Jakub Bizan ◽  
Shuji Shigenobu ◽  
Katsushi Yamaguchi ◽  
...  
Keyword(s):  
Plant Root ◽  
Root Cells ◽  
Sucrose Starvation

scholarly journals A novel putative microtubule-associated protein is involved in arbuscule development during arbuscular mycorrhiza formation

2021 ◽  
Author(s):  
Tania Ho-Plágaro ◽  
Raúl Huertas ◽  
María I Tamayo-Navarrete ◽  
Elison Blancaflor ◽  
Nuria Gavara ◽  
...  
Keyword(s):  
Plant Root ◽  
Arbuscular Mycorrhizal ◽  
Host Cells ◽  
Root Cells ◽  
Filament Dynamics ◽  
Fungal Structure ◽  
Genes Encoding ◽  
Associated Proteins ◽  
Mycorrhizal Development

Abstract The formation of arbuscular mycorrhizal (AM) symbiosis requires plant root host cells to undergo major structural and functional reprogramming in order to house the highly branched AM fungal structure for the reciprocal exchange of nutrients. These morphological modifications are associated with cytoskeleton remodelling. However, molecular bases and the role of microtubules (MTs) and actin filament dynamics during AM formation are largely unknown. In this study, the tomato tsb gene, belonging to a Solanaceae group of genes encoding MT-associated proteins for pollen development, was found to be highly expressed in root cells containing arbuscules. At earlier stages of mycorrhizal development, tsb overexpression enhanced the formation of highly developed and transcriptionally active arbuscules, while tsb silencing hampers the formation of mature arbuscules and represses arbuscule functionality. However, at later stages of mycorrhizal colonization, tsb OE roots accumulate fully developed transcriptionally inactive arbuscules, suggesting that the collapse and turnover of arbuscules might be impaired by TSB accumulation. Imaging analysis of the MT cytoskeleton in cortex root cells overexpressing tsb revealed that TSB is involved in MT-bundling. Taken together, our results provide unprecedented insights into the role of novel MT-associated protein in MT rearrangements throughout the different stages of the arbuscule life cycle.

scholarly journals Mathematical Model and Simulation for Nutrient-Plant Interaction Analysis

2020 ◽  
Author(s):  
Byunghyun Ban
Keyword(s):  
Cell Membrane ◽  
Interaction Analysis ◽  
Plant Root ◽  
Gene Expression Pattern ◽  
Root Cell ◽  
Ion Concentration ◽  
Absorption Model ◽  
Membrane Flow ◽  
Root Cells ◽  
Model And Simulation

Differential equation models to understand interaction between plant and nutrient solution are presented. The root cells selectively emit H+ ions with active transport consuming ATPs to establish electrical gradient along the cell membrane. It establishes electrical field with Nernst potential to make positively charged ions outside the cell membrane flow into the root cell. Anion influx is also modulated by H+ ion concentration because plant root cell absorbs negatively charged particles with symport. If an anion collides with H+ cell to make net charge as neutral, at symport channel, it can flow through. In this paper, mathematical models for cation and anion absorption are introduced. Cation absorption model was induced from Ohm's law combined with Goldman's equation. Anion absorption model is similar to chemical reaction rate model. Both models have physiological terms influenced by gene expression pattern, species or phenotypes. Cation model also includes terms for ion's kinetic and electrical properties, growth of plant and interaction between the root and the surroundings. Simulation for 20 different sets of coefficients showed that the physiology-related coefficient has important role on nutrition absorption tendencies of plants.

scholarly journals Phospholipid Fatty Acid (PLFA) Analysis of Rhizosphere Bacterial Communities in a Peat Soil

2002 ◽  
Vol 51 (1-2) ◽  
pp. 123-128 ◽  
Author(s):  
András Halbritter ◽  
T. Mogyoróssy
Keyword(s):  
Fatty Acid ◽  
Bacterial Communities ◽  
Phospholipid Fatty Acid ◽  
Plant Root ◽  
Peat Soil ◽  
Total Lipid Content ◽  
Gas Chromatography Mass Spectrometry ◽  
Root Cells ◽  
Plfa Analysis ◽  
Rhizosphere Bacterial Communities

To analyze the rhizosphere bacterial communities in wetlands, the total lipid content was extracted from a peat soil and 4 abundant wetland plant roots ( Typha angustifolia L., Salix cinerea L., Carex pseudocyperus L., Thelypteris palustris Salisb.). The separated phospholipid fraction was further fractionated and deriva­tized prior to gas chromatography-mass spectrometry (GC-MS) measurement. In the evaluation only the bacteria-specific fatty acids were used in order to neglect fatty acid information derived from plant root cells. Based on these analyses, a high level bacterial concentration was demonstrated in the rhizosphere, and the relative occurrence of aerobe and anaerobe, Gram positive and negative bacteria, methanotrophs, sulphate reducers and Actinobacteria was determined. Through the PLFA analysis the study of bacteria regardless of culturability was possible.

scholarly journals Destruction Process of Plant Root Cells by Aluminum

1987 ◽  
Vol 33 (2) ◽  
pp. 161-175 ◽  
Author(s):  
Tadao Wagatsuma ◽  
Minoru Kaneko ◽  
Yasuhiro Hayasaka
Keyword(s):  
Plant Root ◽  
Destruction Process ◽  
Root Cells

scholarly journals Evaluation of Antifungal Activity of Chitosan Nanoparticles Against Fusarium Solani Phytopathogenic Fungi in in Vitro and in Vivo Assays

2021 ◽  
Author(s):  
Pamela R. Avila ◽  
Graciela Juez Castillo ◽  
Carel E. Carvajal
Keyword(s):  
Antifungal Activity ◽  
Fusarium Solani ◽  
Plant Root ◽  
Chitosan Nanoparticles ◽  
Fungal Growth ◽  
Fungal Cell ◽  
Tomato Root ◽  
Root Cells

Abstract Fungal diseases are a current problem in agriculture causing significant losses in several crops whereby its prevention and treatment is of utmost importance. The Chitosan nanoparticles (ChNPs) were evaluated for their antimicrobial activity against the phytopathogen Fusarium solani. The chitosan concentration in nanoparticles that showed antifungal activity was 2.0 µg/mL. ChNPs showed to be a potential antifungal candidate with applications in phytosanitary control. Transmission electron microscopy (TEM) results showed damage to the fungal cell wall and membrane caused by the nanoparticles interaction with these structures affecting fungal growth and development in in vitro as in in vivo assay where microscopy demonstrated the internalization of nanoparticles aggregates within plant root cells cytoplasm up to 45 days. Therefore ChNPs nanoparticles could be an alternative method for diseases caused by Fusarium solani instead of chemical fungicides commonly used for treating tomato root rot.

scholarly journals TAXONOMY OF LONGIDORID NEMATODES AND DICHOTOMOUS KEYS FOR THE IDENTIFICATION OF XIPHINEMA AND XIPHIDORUS SPECIES RECORDED IN BRAZIL

2006 ◽  
Vol 73 (1) ◽  
pp. 131-141
Author(s):  
C.M.G. Oliveira ◽  
R. Neilson
Keyword(s):  
Plant Root ◽  
Crop Plants ◽  
Vegetable Crops ◽  
Fruit And Vegetable ◽  
Root Cells ◽  
Important Family ◽  
Wide Range ◽  
Extensive Range

ABSTRACT Ectoparasitic Longidoridae are globally an economically important family of nematodes that cause damage to an extensive range of crop plants by their feeding on plant root cells or transmitting viruses to a wide range of fruit and vegetable crops. Here, we provide an update review of Longidoridae taxonomy, including their basic morphology and the taxonomic characters used to distinguish the seven Longidoridae genera (Australodorus, Longidorus, Longidoroides, Paralongidorus, Paraxiphidorus, Xiphidorus and Xiphinema). In addition, dichotomous keys for the identification of Xiphidorus and Xiphinema species reported in Brazil are presented.

scholarly journals Disease resistance through impairment of α-SNAP–NSF interaction and vesicular trafficking by soybean Rhg1

2016 ◽  
Vol 113 (47) ◽  
pp. E7375-E7382 ◽  
Author(s):  
Adam M. Bayless ◽  
John M. Smith ◽  
Junqi Song ◽  
Patrick H. McMinn ◽  
Alice Teillet ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Soybean Cyst Nematode ◽  
Protein Complexes ◽  
Essential Gene ◽  
Vesicle Trafficking ◽  
Plant Root ◽  
Wild Type ◽  
In Planta ◽  
Root Cells ◽  
Feeding Site

α-SNAP [soluble NSF (N-ethylmaleimide–sensitive factor) attachment protein] and NSF proteins are conserved across eukaryotes and sustain cellular vesicle trafficking by mediating disassembly and reuse of SNARE protein complexes, which facilitate fusion of vesicles to target membranes. However, certain haplotypes of the Rhg1 (resistance to Heterodera glycines 1) locus of soybean possess multiple repeat copies of an α-SNAP gene (Glyma.18G022500) that encodes atypical amino acids at a highly conserved functional site. These Rhg1 loci mediate resistance to soybean cyst nematode (SCN; H. glycines), the most economically damaging pathogen of soybeans worldwide. Rhg1 is widely used in agriculture, but the mechanisms of Rhg1 disease resistance have remained unclear. In the present study, we found that the resistance-type Rhg1 α-SNAP is defective in interaction with NSF. Elevated in planta expression of resistance-type Rhg1 α-SNAPs depleted the abundance of SNARE-recycling 20S complexes, disrupted vesicle trafficking, induced elevated abundance of NSF, and caused cytotoxicity. Soybean, due to ancient genome duplication events, carries other loci that encode canonical (wild-type) α-SNAPs. Expression of these α-SNAPs counteracted the cytotoxicity of resistance-type Rhg1 α-SNAPs. For successful growth and reproduction, SCN dramatically reprograms a set of plant root cells and must sustain this sedentary feeding site for 2–4 weeks. Immunoblots and electron microscopy immunolocalization revealed that resistance-type α-SNAPs specifically hyperaccumulate relative to wild-type α-SNAPs at the nematode feeding site, promoting the demise of this biotrophic interface. The paradigm of disease resistance through a dysfunctional variant of an essential gene may be applicable to other plant–pathogen interactions.

Agrobacterium rhizogenes inserts T-DNA into the genomes of the host plant root cells

Nature ◽  
1982 ◽  
Vol 295 (5848) ◽  
pp. 432-434 ◽  
Author(s):  
Mary-Dell Chilton ◽  
David A. Tepfer ◽  
Annik Petit ◽  
Chantal David ◽  
Francine Casse-Delbart ◽  
...  
Keyword(s):  
Host Plant ◽  
Agrobacterium Rhizogenes ◽  
Plant Root ◽  
Root Cells
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