Related Experiment Video
Updated: Mar 22, 2026
08:39
Author Spotlight: Polysome Profiling Protocol for Studying Translational Regulation in Arabidopsis Under Heat Stress
Published on: October 11, 2024
2.3K
Regulatory Networks in Pollen Development under Cold Stress.
Kamal D Sharma1, Harsh Nayyar2
1Department of Agricultural Biotechnology, Chaudhary Sarwan Kumar Himachal Pradesh Agricultural University Palampur, India.
Frontiers in Plant Science
|April 12, 2016
Summary
Cold stress causes pollen sterility by altering anther metabolism. Cold-tolerant plants maintain viable pollen through distinct regulatory pathways, unlike susceptible ones.
Area of Science:
- Plant reproductive biology
- Molecular plant physiology
- Stress responses in plants
Background:
- Cold stress is a major environmental factor affecting crop yield by inducing pollen sterility.
- Understanding the molecular mechanisms underlying cold-induced pollen sterility is crucial for developing climate-resilient crops.
Purpose of the Study:
- To elucidate the metabolic and regulatory pathway differences in anthers of cold-susceptible versus cold-tolerant plants under cold stress.
- To identify key molecular players involved in determining pollen viability or sterility.
Main Methods:
- Comparative analysis of metabolic pathways in anthers from susceptible and tolerant plant lines exposed to cold stress.
- Investigation of gene expression related to abscisic acid (ABA) and gibberellin (GA) metabolism and signaling.
- Analysis of carbohydrate pools and pollen viability assays.
Main Results:
- Cold stress increases abscisic acid (ABA) metabolism and decreases ABA catabolism in susceptible anthers, leading to distorted carbohydrate pools.
- Cold stress represses gibberellin (GA) biosynthesis genes, reducing bioactive GA4 and GA7 levels in susceptible anthers.
- Cold-tolerant anthers exhibit different metabolic and regulatory responses, maintaining a higher proportion of viable pollen.
Conclusions:
- Differential regulation of ABA and GA pathways is critical for determining pollen viability under cold stress.
- Metabolic alterations in anthers, particularly carbohydrate availability and hormone signaling, are key factors in cold-induced pollen sterility.
Keywords:
abscisic acid signalingantherbioactive gibberellinscold stresspollen developmentpollen sterilitysugar metabolismMore Related Videos
Related Concept Videos
02:45Responses to Heat and Cold Stress
15.6K
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.
15.6K
02:04Regulation of Transpiration by Stomata
32.1K
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.
32.1K
01:17Gene Regulation During Sporulation
629
Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
629
01:25Cell Signaling in Plants
7.0K
Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
7.0K
02:02Responses to Salt Stress
15.0K
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.
15.0K
01:30Other Stress Responses in Bacteria
504
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...
504