Related Experiment Video
Updated: Jun 13, 2026
05:08
Measurement of Tissue Non-Heme Iron Content using a Bathophenanthroline-Based Colorimetric Assay
Published on: January 31, 2022
PbbHLH41 negatively regulates iron deficiency tolerance in pear
Zhou Xu1, Yijing Ge1, Shuqin Zhang1
1College of Horticulture, Anhui Agricultural University, Hefei 230036, China.
Summary
Iron deficiency negatively impacts plant growth and fruit yield. Researchers identified a gene, PbbHLH41, that worsens iron deficiency tolerance in plants by suppressing iron uptake. This finding aids in developing crops with improved iron deficiency resistance.
Area of Science:
- Plant Biology
- Molecular Genetics
- Agricultural Science
Background:
- Iron (Fe) is crucial for plant development, and its deficiency causes chlorosis and reduced yield, particularly in pear fruits.
- Understanding the molecular mechanisms underlying plant responses to iron deficiency is vital for improving crop resilience.
Purpose of the Study:
- To investigate the role of the bHLH transcription factor PbbHLH41 in regulating iron deficiency tolerance in plants.
- To explore the potential of PbbHLH41 as a target for enhancing crop tolerance to iron deficiency.
Main Methods:
- Gene expression analysis under iron deficiency conditions.
- Generation and functional analysis of PbbHLH41-overexpressed tomato plants and PbbHLH41-knockout pear calli using gene editing.
- Dual-luciferase and yeast one-hybrid assays to determine PbbHLH41's regulatory interactions.
Main Results:
- PbbHLH41 expression was downregulated under iron deficiency.
- Overexpression of PbbHLH41 reduced iron deficiency tolerance, while knockout enhanced it.
- PbbHLH41 was found to inhibit the expression of iron uptake genes like PbFRO2-like and PbIRT1.
Conclusions:
- PbbHLH41 acts as a negative regulator of iron deficiency tolerance in plants.
- This study provides a basis for breeding pear rootstocks with enhanced iron deficiency tolerance through genetic manipulation of PbbHLH41.
Related Concept Videos
01:23Stringent Response in E. coli
Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...
01:24Microbes and Other Elemental Cycles
Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
01:30Other Stress Responses in Bacteria
Bacteria have global regulatory systems that control several types of stress mechanisms. These include Pho regulon and the heat shock response, which are essential systems for environmental adaptation, such as nutrient limitation and proteotoxic stress. The Pho regulon and the heat shock response exemplify bacterial resilience, enabling rapid adaptation to fluctuating environmental conditions.Pho RegulonBacteria require phosphorus for essential cellular processes, including nucleic acid...