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Related Concept Videos

Responses to Salt Stress02:02

Responses to Salt Stress

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Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
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Determining the pH of Salt Solutions04:08

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The pH of a salt solution is determined by its component anions and cations. Salts that contain pH-neutral anions and the hydronium ion-producing cations form a solution with a pH less than 7. For example, in ammonium nitrate (NH4NO3) solution, NO3− ions do not react with water whereas NH4+ ions produce the hydronium ions resulting in the acidic solution.  In contrast, salts that contain pH-neutral cations and the hydroxide ion-producing anions form a solution with a pH greater than 7. For...
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Overview
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Receptor-mediated Endocytosis01:20

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Receptor-mediated endocytosis is when bulk amounts of specific molecules are imported into a cell after binding to cell surface receptors. The molecules bound to these receptors are taken into the cell through inward folding of the cell surface membrane, which is eventually pinched off into a vesicle within the cell. Structural proteins, such as clathrin, coat the budding vesicle.
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Aryldiazonium Salts to Azo Dyes: Diazo Coupling01:11

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The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para...
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Nucleophilic Aromatic Substitution of Aryldiazonium Salts: Aromatic SN101:14

Nucleophilic Aromatic Substitution of Aryldiazonium Salts: Aromatic SN1

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Treating arylamines with nitrous acid gives aryldiazonium salts that are effective substrates in nucleophilic aromatic substitution reactions. The diazonio group in these salts can be easily displaced by different nucleophiles, yielding a wide variety of substituted benzenes. The leaving group departs as nitrogen gas, and this easy elimination is the driving force for the substitution reaction.
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Updated: Jan 24, 2026

Analysis of Effect of Compound Salt Stress on Seed Germination and Salt Tolerance Analysis of Pepper Capsicum annuum L.
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MiR319 mediated salt tolerance by ethylene.

Yanrong Liu1, Dayong Li2, Jianping Yan1

  • 1Department of Grassland Science, China Agricultural University, Beijing, China.

Plant Biotechnology Journal
|May 17, 2019
PubMed
Summary

MicroRNA319 (miR319) enhances salt tolerance in switchgrass by boosting ethylene production. This study reveals a novel crosstalk mechanism involving miR319 and ethylene for improving plant resilience to salinity stress.

Keywords:
Met cycleethylenemiR319salt toleranceswitchgrass

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Area of Science:

  • Plant Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Plant salt tolerance involves microRNAs and ethylene. MicroRNA319 (miR319) is known to aid stress resistance in C3 plants.
  • The function of miR319 in C4 plants like switchgrass (Panicum virgatum L.) remains uncharacterized.

Purpose of the Study:

  • To investigate the role of miR319 in switchgrass salt tolerance.
  • To elucidate the crosstalk between miR319 and ethylene (ET) in response to salinity stress.

Main Methods:

  • Overexpression of Osa-MIR319b and a miR319 target mimic (MIM319) in switchgrass.
  • Experimental treatments to assess ET-mediated salt tolerance.
  • Repression of a miR319 target gene (PvPCF5).
  • Genome-wide transcriptome analysis.

Main Results:

  • miR319 positively regulates ethylene synthesis and enhances salt tolerance in switchgrass.
  • Ethylene-mediated salt tolerance is dose-dependent in switchgrass.
  • Repressing the miR319 target PvPCF5 increases ethylene accumulation and salt tolerance.
  • Overexpression of miR319 affects genes in the methionine cycle and ethylene synthesis pathways.

Conclusions:

  • miR319 and ethylene act synergistically to improve salt tolerance in switchgrass.
  • The miR319-PvPCF5 module fine-tunes ethylene synthesis for salinity response.
  • Findings contribute to understanding salt tolerance mechanisms in C4 bioenergy crops.