AI Article Synopsis
- * Out of 61 significant SNPs, nearly half are associated with drought-tolerant genes, impacting various traits like stomatal closure and root development, which are crucial for water management.
- * Findings emphasize the role of ABA-dependent signaling pathways and their interactions with other genes in regulating vital functions that enhance maize's ability to cope with drought stress.
Article Abstract
Background: Earlier studies were focused on the genetics of temperate and tropical maize under drought. We identified genetic loci and their association with functional mechanisms in 240 accessions of subtropical maize using a high-density marker set under water stress.
Results: Out of 61 significant SNPs (11 were false-discovery-rate-corrected associations), identified across agronomic traits, models, and locations by subjecting the accessions to water stress at flowering stage, 48% were associated with drought-tolerant genes. Maize gene models revealed that SNPs mapped for agronomic traits were in fact associated with number of functional traits as follows: stomatal closure, 28; flowering, 15; root development, 5; detoxification, 4; and reduced water potential, 2. Interactions of these SNPS through the functional traits could lead to drought tolerance. The SNPs associated with ABA-dependent signalling pathways played a major role in the plant's response to stress by regulating a series of functions including flowering, root development, auxin metabolism, guard cell functions, and scavenging reactive oxygen species (ROS). ABA signalling genes regulate flowering through epigenetic changes in stress-responsive genes. ROS generated by ABA signalling are reduced by the interplay between ethylene, ABA, and detoxification signalling transductions. Integration of ABA-signalling genes with auxin-inducible genes regulates root development which in turn, maintains the water balance by regulating electrochemical gradient in plant.
Conclusions: Several genes are directly or indirectly involved in the functioning of agronomic traits related to water stress. Genes involved in these crucial biological functions interacted significantly in order to maintain the primary as well as exclusive functions related to coping with water stress. SNPs associated with drought-tolerant genes involved in strategic biological functions will be useful to understand the mechanisms of drought tolerance in subtropical maize.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4367829 | PMC |
| http://dx.doi.org/10.1186/1471-2164-15-1182 | 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 PDFThe Plant Ionome as a Functional Trait: Variation across Bioclimatic Regions and Functional Groups.
Physiol Plant
January 2025
School of Plant Sciences and Food Security, Faculty of Life Sciences, Tel Aviv University, Israel.
Plant chemical composition is a trait gaining increasing importance in plant ecology. However, there is limited research on the patterns and drivers of its variation among different plant functional groups and bioclimatic regions. We conducted an analysis of ionomes utilising X-ray fluorescence on 83 plant species from four distinct functional groups (grasses, legumes, forbs and woody species); we marked plots across 15 sites located in both the desert and Mediterranean bioclimatic regions.
View Article and Find Full Text PDFEcogenomic insights into the resilience of keystone Blastococcus Species in extreme environments: a comprehensive analysis.
BMC Genomics
January 2025
Department of Biological and Chemical Engineering, USCR Molecular Bacteriology and Genomics, University of Carthage, National Institute of Applied Sciences and Technology, Tunis, 2080, Tunisia.
Background: The stone-dwelling genus Blastococcus plays a key role in ecosystems facing extreme conditions such as drought, salinity, alkalinity, and heavy metal contamination. Despite its ecological significance, little is known about the genomic factors underpinning its adaptability and resilience in such harsh environments. This study investigates the genomic basis of Blastococcus's adaptability within its specific microniches, offering insights into its potential for biotechnological applications.
View Article and Find Full Text PDFDecrypting proteomics, transcriptomics, genomics, and integrated omics for augmenting the abiotic, biotic, and climate change stress resilience in plants.
J Plant Physiol
January 2025
Department of Botany, University of Delhi, New Delhi, 110007, Delhi, India. Electronic address:
As our planet faces increasing environmental challenges, such as biotic pressures, abiotic stressors, and climate change, it is crucial to understand the complex mechanisms that underlie stress responses in crop plants. Over past few years, the integration of techniques of proteomics, transcriptomics, and genomics like LC-MS, IT-MS, MALDI-MS, DIGE, ESTs, SAGE, WGS, GWAS, GBS, 2D-PAGE, CRISPR-Cas, cDNA-AFLP, HLS, HRPF, MPSS, CAGE, MAS, IEF, MudPIT, SRM/MRM, SWATH-MS, ESI have significantly enhanced our ability to comprehend the molecular pathways and regulatory networks, involved in balancing the ecosystem/ecology stress adaptation. This review offers thorough synopsis of the current research on utilizing these multi-omics methods (including metabolomics, ionomics) for battling abiotic (salinity, temperature (chilling/freezing/cold/heat), flood (hypoxia), drought, heavy metals/loids), biotic (pathogens like fungi, bacteria, virus, pests, and insects (aphids, caterpillars, moths, mites, nematodes) and climate change stress (ozone, ultraviolet radiation, green house gases, carbon dioxide).
View Article and Find Full Text PDFGenome-wide analysis of the SPL family in Zanthoxylum armatum and ZaSPL21 promotes flowering and improves salt tolerance in transgenic Nicotiana benthamiana.
Plant Mol Biol
January 2025
Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences, Institute of Agro-Bioengineering, Guizhou University, Guiyang, 550025, China.
Z. armatum is an economically valued crop known for its rich aroma and medicinal properties. This study identified 45 members of the SQUAMOSA-PROMOTER BINDING PROTEIN LIKE (SPL) gene family in the genome of Z.
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!