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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...

Regulation of Transpiration by Stomata

Regulation of Transpiration by Stomata

During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.

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.

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.

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Laser-Capture Microdissection RNA-Sequencing for Spatial and Temporal Tissue-Specific Gene Expression Analysis in Plants

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Published on: August 5, 2020

Transcriptomic changes in wind-exposed poplar leaves are dependent on developmental stage.

Silvia Fluch¹, Christian Carlo Olmo, Stefanie Tauber

¹Austrian Research Centers GmbH, ARC, Division of Biogenetics/Natural Resources, PICME, 2444, Seibersdorf, Austria.

|August 23, 2008

Summary

Plant defense responses are non-linear and vary with leaf age. This study reveals gene expression changes in Populus nigra leaves exposed to wind, illuminating the molecular basis of thigmomorphogenesis.

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Area of Science:

Plant biology
Molecular ecology
Environmental stress response

Background:

Plant defense mechanisms vary across tissues and developmental stages.
Environmental factors like wind trigger thigmomorphogenesis, but molecular details remain incomplete.
Resource allocation and fitness value influence defense investment.

Purpose of the Study:

To investigate the non-linear, age-dependent transcriptome-level responses of Populus nigra to wind-like air perturbation.
To elucidate the molecular mechanisms underlying plant responses to continuous environmental factors.
To identify specific genes activated by wind exposure across different leaf ontogenic stages.

Main Methods:

Transcriptome analysis of Populus nigra leaves at various developmental stages (young, expanding, adult, old).
Exposure of plants to controlled air perturbation simulating wind effects.
Gene expression profiling to identify changes in response to the environmental stimulus.

Main Results:

Demonstrated a non-linear pattern in plant defense gene expression across different leaf ages.
Identified specific sets of genes activated by low-dose air perturbation in Populus nigra.
Provided a detailed view of the ontogenic trajectory of gene expression changes due to wind exposure.

Conclusions:

Plant defense responses to environmental challenges are complex and age-dependent.
The study provides novel insights into the molecular underpinnings of thigmomorphogenesis.
Understanding these responses is crucial for comprehending plant adaptation to ubiquitous environmental factors.