Related Experiment Video
Updated: Jul 14, 2026

Measuring Gene Expression in Bombarded Barley Aleurone Layers with Increased Throughput
Published on: March 30, 2018
Arabidopsis EIN2 modulates stress response through abscisic acid response pathway
Youning Wang1, Chuang Liu, Kexue Li
1The State Key Laboratory of Plant Cell and Chromosome Engineering, Center for Agricultural Resources, Institute of Genetics and Developmental Biology, Chinese Academy of Science, 286 Huaizhong Road, Shijiazhuang, Hebei, 050021, PR China.
ETHYLENE INSENSITIVE2 (EIN2) is crucial for plant stress response, linking ethylene and abscisic acid (ABA) signaling. EIN2 regulates osmotic and salt stress tolerance through an ABA-dependent pathway, essential for plant survival.
Area of Science:
- Plant molecular biology
- Plant hormone signaling
- Abiotic stress responses
Background:
- ETHYLENE INSENSITIVE2 (EIN2) is a key regulator in plant ethylene signaling.
- Abscisic acid (ABA) mediates plant stress responses.
- The role of EIN2 in plant responses to salt and osmotic stress was previously unreported.
Purpose of the Study:
- To investigate the role of EIN2 in plant response to osmotic and salt stress.
- To elucidate the involvement of ABA in EIN2-mediated stress responses.
- To identify EIN2's position within plant hormone signaling networks.
Main Methods:
- Analysis of an Arabidopsis EIN2 null mutant under salt and osmotic stress conditions.
- Gene expression analysis of stress-responsive marker genes (RD29A, RD29B, RD22).
- Measurement of ABA levels in EIN2 mutant and wild-type plants.
Main Results:
- EIN2 gene expression is down-regulated by salt and osmotic stress.
- EIN2 null mutants exhibit hypersensitivity to salt and osmotic stress.
- EIN2 disruption specifically affects RD29B expression, indicating modulation via the RD29B ABA response pathway.
- EIN2 disruption leads to a significant increase in ABA levels.
- Mutations in other ethylene pathway genes also alter abiotic stress sensitivity.
Conclusions:
- EIN2 acts as a crucial cross-link between ethylene, ABA, and stress signaling pathways.
- EIN2 is essential for developmental arrest and growth regulation under adverse environmental conditions, promoting plant survival.
- The ethylene signaling pathway, involving EIN2, plays a significant role in plant abiotic stress responses.
Related Concept Videos
Adaptations that Reduce Water Loss
Cell Signaling in Plants
Responses to Drought and Flooding
Responses to Heat and Cold Stress
Responses to Salt Stress
Other Stress Responses in Bacteria

