Related Experiment Video
Updated: May 24, 2026
12:36
Chromatin Immunoprecipitation Assay for the Identification of Arabidopsis Protein-DNA Interactions In Vivo
Published on: January 14, 2016
Flowering time and transcriptome variation in Capsella bursa-pastoris (Brassicaceae)
Hui-Run Huang1,2, Peng-Cheng Yan3, Martin Lascoux4,5
1Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, the Chinese Academy of Sciences, Guangzhou 510650, China.
The New Phytologist
|March 14, 2012
Summary
Flowering time in plants is crucial for survival. This study reveals that circadian rhythms and clock genes significantly influence flowering time variation in *Capsella bursa-pastoris*, aiding adaptation to diverse environments.
Area of Science:
- Plant Biology
- Evolutionary Genetics
- Environmental Adaptation
Background:
- Flowering time is a critical plant developmental transition influencing fitness.
- Understanding the genetic basis of flowering time aids in comprehending plant adaptation to local environments.
- Environmental cues like day length and temperature significantly impact flowering phenology.
Purpose of the Study:
- To investigate the variation in flowering time of *Capsella bursa-pastoris* across different latitudes in China.
- To identify candidate genes associated with flowering time variation using digital gene expression analysis.
- To explore the role of genetic factors, particularly circadian rhythms, in the adaptation of flowering time.
Main Methods:
- Collected *Capsella bursa-pastoris* samples from various latitudes in China.
- Utilized a digital gene expression (DGE) system to generate partial gene expression profiles.
- Analyzed flowering time correlations with environmental factors (day length, temperature) and gene expression differences.
Main Results:
- Flowering time in *C. bursa-pastoris* exhibited high variability, strongly correlating with day length and winter temperature.
- Significant gene expression differences were observed for 72 candidate flowering time genes between early- and late-flowering individuals.
- Genes associated with circadian rhythms were significantly overrepresented among differentially expressed genes.
Conclusions:
- Circadian rhythms and circadian clock genes play a significant role in the evolutionary adaptation of flowering time.
- *C. bursa-pastoris* demonstrates differential expression of candidate flowering time genes, reflecting adaptation to diverse Chinese environments.
- Genetic variation in flowering time, influenced by circadian mechanisms, is key to plant survival across varied ecological niches.
Related Concept Videos
02:45Biological Clocks and Seasonal Responses
The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
01:10Transcription
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...
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...
02:33Seed Structure and Early Development of the Sporophyte
Seed structures are composed of a protective seed coat surrounding a plant embryo, and a food store for the developing embryo. The embryo contains the precursor tissues for leaves, stem, and roots. The endosperm and cotyledons—seed leaves—act as the food reserves for the growing embryo.
02:16Light Acquisition
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
02:18Alternative RNA Splicing
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...