AI Article Synopsis
- Soluble carbohydrates like raffinose family oligosaccharides (RFOs) play a crucial role in helping plants tolerate cold stress and influencing their growth.
- Researchers focused on galactinol, vital for RFO production, to see if it acts as a signaling molecule for cold tolerance.
- In their study, they discovered that expressing galactinol synthase (AnGolS1) from a desert plant in tomatoes not only improved cold tolerance but also altered sugar profiles and enhanced ethylene signaling during seed germination.
Article Abstract
Soluble carbohydrates not only directly affect plant growth and development but also act as signal molecules in processes that enhance tolerance to cold stress. Raffinose family oligosaccharides (RFOs) are an example and play an important role in abiotic stress tolerance. This study aimed to determine whether galactinol, a key limiting factor in RFO biosynthesis, functions as a signal molecule in triggering cold tolerance. Exposure to low temperatures induces the expression of galactinol synthase (AnGolS1) in Ammopiptanthus nanus, a desert plant that survives temperatures between -30 °C to 47 °C. AnGolS1 has a greater catalytic activity than tomato galactinol synthase (SlGolS2). Moreover, SlGolS2 is expressed only at low levels. Expression of AnGolS1 in tomato enhanced cold tolerance and led to changes in the sugar composition of the seeds and seedlings. AnGolS1 transgenic tomato lines exhibited an enhanced capacity for ethylene (ET) signaling. The application of galactinol abolished the repression of the ET signaling pathway by 1-methylcyclopropene during seed germination. In addition, the expression of ERF transcription factors was increased. Galactinol may therefore act as a signal molecule affecting the ET pathway.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1093/jxb/erz450 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Correlation analysis of transcriptome and metabolomics and functional study of Galactinol synthase gene (VcGolS3) of blueberry under salt stress.
Plant Mol Biol
January 2025
College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin, 300392, China.
Soil salinity poses a significant environmental challenge for the growth and development of blueberries. However, the specific mechanisms by which blueberries respond to salt stress are still not fully understood. Here, we employed a comprehensive approach integrating physiological, metabolomic, and transcriptomic analyses to identify key metabolic pathways in blueberries under salt stress.
View Article and Find Full Text PDFGalactinol synthase 4 influences plant height by affecting phenylpropanoid metabolism and the balance of soluble carbohydrates in tomato.
Plant Physiol Biochem
January 2025
Modern Protected Horticulture Engineering & Technology Center, College of Horticulture, Shenyang Agricultural University, China; National & Local Joint Engineering Research Center of Northern Horticultural Facilities Design & Application Technology (Liaoning), Shenyang, China; Key Laboratory of Protected Horticulture (Shenyang Agricultural University), Ministry of Education, Shenyang, China; Key Laboratory of Horticultural Equipment, Ministry of Agriculture and Rural Affairs, Shenyang, China. Electronic address:
Plant height is a key trait that significantly influences plant architecture, disease resistance, adaptability to mechanical cultivation, and overall economic yield. Galactinol synthase (GolS) is a crucial enzyme involved in the biosynthesis of raffinose family oligosaccharides (RFOs). It plays a significant role in carbohydrate transport and storage, combating abiotic and biotic stresses, and regulating plant growth and development.
View Article and Find Full Text PDFGalactinol synthase gene 5 (MdGolS5) enhances the cold resistance of apples by promoting raffinose family oligosaccharide accumulation.
Plant Physiol Biochem
December 2024
College of Horticulture, Shenyang Agricultural University, Key Lab of Fruit Quality Development and Regulation of Liaoning Province, Shenyang, 110866, China. Electronic address:
Article Synopsis
- Low-temperature stress is a major challenge for apple production, and galactinol acts as a key cryoprotectant.
- Exogenous application of galactinol on apple saplings was shown to reduce damage from cold stress, and transgenic plants overexpressing the MdGolS5 gene exhibited increased cold tolerance.
- The study highlights the potential of galactinol and its biosynthetic pathway in enhancing cold resistance in apples, providing insights for future genetic improvements.
Galactinol synthase 4 requires sulfur assimilation pathway to provide tolerance towards arsenic stress under limiting sulphur condition in Arabidopsis.
J Hazard Mater
December 2024
CSIR-National Botanical Research Institute (CSIR-NBRI), Rana Pratap Marg, Lucknow 226001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India; CSIR-Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), P.O. CIMAP, Near Kukrail Picnic Spot, Lucknow 226 015, India. Electronic address:
Heavy metalloid stress such as arsenic (As) toxicity and nutrient imbalance constitute a significant threat to plant productivity and development. Plants produce sulfur (S)-rich molecules like glutathione (GSH) to detoxify arsenic, but sulfur deficiency worsens its impact. Previous research identified Arabidopsis thaliana ecotypes Koz2-2 (tolerant) and Ri-0 (sensitive) under low-sulfur (LS) and As(III) stress.
View Article and Find Full Text PDFEfficacy and Fate of RNA Interference Molecules in the Green Pea Aphid, Acyrthosiphon pisum.
Arch Insect Biochem Physiol
December 2024
Biological Control of Insects Research Laboratory, Research Park, USDA Agricultural Research Service, Columbia, Missouri, USA.
RNA interference (RNAi) is a promising technology for controlling insect pests of agriculture. This technology is mediated through the application of double-stranded RNAs (dsRNAs), which are processed within the insect cells into small interfering RNAs (siRNAs). These molecules then target and reduce the expression of the insect-specific genes that can kill or reduce the performance of the pest.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!