Climate changes especially chilling stress affects cucurbit crops during winter seasonal production. Grafting to pumpkin rootstocks is widely used to improve the vigor of cucurbits, especially cucumber ( L.) plants, in the face of chilling stress. In our study, multi-disciplinary aspect approaches were used to investigate growth changes of pumpkin under chilling stress. Firstly, the morphological and physiological characteristics of 14 pumpkin () varieties following different periods of chilling stress was analyzed by using physiological means. Mathematical results of principal component analysis (PCA) with chlorophyll-a, chlorophyll-b, carotenoid contents, chilling injury index and relative electrolyte permeability indicated that relative electrolyte permeability as the primary judgment index was best associated with the comparison of chilling tolerance in pumpkin rootstock varieties. Then, transcriptomic and DCMU (Diuron) application and chlorophyll fluorescence examination analysis of pumpkin leaves revealed that 390 differentially expressed genes (CmoDEGs) that affect photosynthesis were upregulated in leaves. 127 CmoDEGs both in leaves and roots were enriched for genes involved in unsaturated fatty acid metabolism, suggesting that plasma membrane lipids are involved in chilling perception. The results of increased composition of unsaturated fatty acid in leaves and qRT-PCR analysis of relative mRNA abundance confirmed that α-linolenic acid biosynthesis was responding to pumpkin chilling tolerance. The integration of physiological, mathematical bioinformatical and biological analysis results contributes to our understanding of the molecular mechanisms underlying chilling tolerance and its improvement in cucumber grafted on pumpkin rootstocks. It provided an important theoretical basis and reference for further understanding on the impact of climate change on plant physiological changes.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8104029 | PMC |
| http://dx.doi.org/10.3389/fpls.2021.669565 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Chromatin Accessibility Mediated by CHROMATIN REMODELING 11 Promotes Chilling Tolerance in Rice.
Plant Physiol
January 2025
The State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University, Nanjing 210095, China.
Chromatin remodeling plays a crucial role in controlling gene transcription by modifying chromatin structure. However, the involvement of chromatin remodeling in plant stress responses, especially cold tolerance, through chromatin accessibility remains largely unexplored. Here, we report that rice (Oryza sativa L.
View Article and Find Full Text PDFTranscriptional regulation of miR528-PPO module by miR156 targeted SPLs orchestrates chilling response in banana.
Mol Hortic
January 2025
Guangdong Provincial Key Laboratory of Applied Botany, Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, 510650, Guangzhou, China.
Banana is sensitive to cold stress and often suffers from chilling injury with browning peel and failure to normal ripening. We have previously reported that banana chilling injury is accompanied by a reduction of miR528 accumulation, alleviating the degradation of its target gene MaPPO and raising ROS levels that cause peel browning. Here, we further revealed that the miR528-MaPPO cold-responsive module was regulated by miR156-targeted SPL transcription factors, and the miR156c-MaSPL4 module was also responsive to cold stress in banana.
View Article and Find Full Text PDFSodium hydrosulfide application induces chilling tolerance in banana fruits by enhancing antioxidant gene expression through the upregulation of the ethylene response factors MaERF53L/121L.
Food Chem
January 2025
State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables/Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticulture, South China Agricultural University, Guangzhou 510642, China. Electronic address:
Sodium hydrosulfide (NaHS), a hydrogen sulfide (H₂S) donor, effectively mitigates chilling injury (CI) in bananas; however, the underlying molecular mechanisms remain unclear. This study demonstrated that NaHS alleviates CI symptoms by activating antioxidant defense systems that reduce oxidative stress induced by CI. Transcriptomic analysis revealed 1003 differentially expressed genes in three sample groups, with enrichment in pathways related to cellular processes, metabolic activity, and secondary metabolite biosynthesis.
View Article and Find Full Text PDFIntegrated omics analysis reveals the interactions among ROS metabolism and malate metabolism associated with chilling tolerance in peach fruit treated with hot air.
Food Res Int
January 2025
College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China. Electronic address:
Continuous supply of NADPH is necessary for the synthesis of ROS, which can be derived from the decarboxylation of malic acid, providing fuels for RbOHs to sustain ROS production. However, excessive accumulations of ROS lead to significant chilling injury (CI) in peaches during cold storage. Our previous studies indicated that hot air (HA) slows the CI progression in peaches by preventing malate degradation.
View Article and Find Full Text PDFTolerance to multiple abiotic stresses is mediated by interacting CNGC proteins that regulate Ca influx and stomatal movement in rice.
J Integr Plant Biol
January 2025
State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, College of Agriculture, Nanjing Agricultural University, Nanjing, 210095, China.
Members of the cyclic nucleotide-gated channel (CNGC) proteins are reportedly involved in a variety of biotic and abiotic responses and stomatal movement. However, it is unknown if and how a single member could regulate multiple responses. Here we characterized three closely related CNGC genes in rice, OsCNGC14, OsCNGC15 and OsCNGC16, to determine whether they function in multiple abiotic stresses.
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!