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Transcription

Transcription

Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...

Adaptations that Reduce Water Loss

Adaptations that Reduce Water Loss

Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.

Responses to Heat and Cold Stress

Responses to Heat and Cold Stress

Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.

Background and Environment Affect Phenotype

Background and Environment Affect Phenotype

Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...

Responses to Drought and Flooding

Responses to Drought and Flooding

Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.

Responses to Salt Stress

Responses to Salt Stress

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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Transcriptomic Insights Into Elevation-Dependent Gene Expression in Rhododendron anthopogon D.Don: Implications for

Zahid Ahmed Mangral¹, Shahid Ul Islam¹, Aasim Majeed²

¹Department of Biotechnology, School of Biosciences and Biotechnology, BGSB, University, Rajouri, India.

Physiologia Plantarum

|July 23, 2025

Summary

Alpine Rhododendron anthopogon adapts to changing elevations through significant gene expression shifts. Key genes involved in stress response and secondary metabolism are upregulated, aiding survival in high-altitude environments.

Keywords:

adaptation climate change differential gene expression elevation gradient gene co‐expression network (GCN)

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Area of Science:

Plant molecular biology
Ecology
Genomics

Background:

Understanding plant adaptation to diverse elevations is crucial for predicting climate change impacts.
Rhododendron anthopogon D.Don is a key alpine species in the Kashmir Himalaya.

Purpose of the Study:

To investigate gene expression variations in Rhododendron anthopogon D.Don along an elevation gradient.
To identify molecular mechanisms underlying adaptation to high altitudes.

Main Methods:

Comparative transcriptomics was employed to analyze gene expression patterns.
Gene co-expression network (GCN) analysis was used to identify regulatory transcription factors.

Main Results:

Significant differences in gene expression were observed between the lowest (3200m) and highest (3900m) elevations.
Transcripts related to stress response and secondary metabolism were highly enriched.
Expression of genes involved in secondary metabolite production increased with altitude.
200 transcription factors from 36 families were implicated in regulating altitude-responsive metabolic pathways.

Conclusions:

Metabolic pathways regulated by identified transcription factors are crucial for Rhododendron anthopogon adaptation to high-altitude environmental stress.
This study provides insights into the molecular basis of alpine plant adaptation to climate change.