1
|
Yu W, Gong F, Xu H, Zhou X. Molecular Mechanism of Exogenous ABA to Enhance UV-B Resistance in Rhododendron chrysanthum Pall. by Modulating Flavonoid Accumulation. Int J Mol Sci 2024; 25:5248. [PMID: 38791294 PMCID: PMC11121613 DOI: 10.3390/ijms25105248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 05/08/2024] [Accepted: 05/09/2024] [Indexed: 05/26/2024] Open
Abstract
With the depletion of the ozone layer, the intensity of ultraviolet B (UV-B) radiation reaching the Earth's surface increases, which in turn causes significant stress to plants and affects all aspects of plant growth and development. The aim of this study was to investigate the mechanism of response to UV-B radiation in the endemic species of Rhododendron chrysanthum Pall. (R. chrysanthum) in the Changbai Mountains and to study how exogenous ABA regulates the response of R. chrysanthum to UV-B stress. The results of chlorophyll fluorescence images and OJIP kinetic curves showed that UV-B radiation damaged the PSII photosystem of R. chrysanthum, and exogenous ABA could alleviate this damage to some extent. A total of 2148 metabolites were detected by metabolomics, of which flavonoids accounted for the highest number (487, or 22.67%). KEGG enrichment analysis of flavonoids that showed differential accumulation by UV-B radiation and exogenous ABA revealed that flavonoid biosynthesis and flavone and flavonol biosynthesis were significantly altered. GO analysis showed that most of the DEGs produced after UV-B radiation and exogenous ABA were distributed in the cellular process, cellular anatomical entity, and catalytic activity. Network analysis of key DFs and DEGs associated with flavonoid synthesis identified key flavonoids (isorhamnetin-3-O-gallate and dihydromyricetin) and genes (TRINITY_DN2213_c0_g1_i4-A1) that promote the resistance of R. chrysanthum to UV-B stress. In addition, multiple transcription factor families were found to be involved in the regulation of the flavonoid synthesis pathway under UV-B stress. Overall, R. chrysanthum actively responded to UV-B stress by regulating changes in flavonoids, especially flavones and flavonols, while exogenous ABA further enhanced its resistance to UV-B stress. The experimental results not only provide a new perspective for understanding the molecular mechanism of the response to UV-B stress in the R. chrysanthum, but also provide a valuable theoretical basis for future research and application in improving plant adversity tolerance.
Collapse
Affiliation(s)
| | | | - Hongwei Xu
- Jilin Provincial Key Laboratory of Plant Resource Science and Green Production, Jilin Normal University, Siping 136000, China
| | - Xiaofu Zhou
- Jilin Provincial Key Laboratory of Plant Resource Science and Green Production, Jilin Normal University, Siping 136000, China
| |
Collapse
|
2
|
Huang X, Rao G, Peng X, Xue Y, Hu H, Feng N, Zheng D. Effect of plant growth regulators DA-6 and COS on drought tolerance of pineapple through bromelain and oxidative stress. BMC PLANT BIOLOGY 2023; 23:180. [PMID: 37020215 PMCID: PMC10074694 DOI: 10.1186/s12870-023-04200-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 03/29/2023] [Indexed: 06/19/2023]
Abstract
BACKGROUND Due to global warming, drought climates frequently occur on land, and despite being drought resistant, pineapples are still subjected to varying degrees of drought stress. Plant growth regulators can regulate the stress tolerance of plants through hormonal effects. This experiment aims to investigate the regulatory effects of different plant growth regulators on Tainong- 16 and MD-2 Pineapple when subjected to drought stress. RESULTS In this experiment, we examined the regulatory effects of two different plant growth regulators, sprayed on two pineapple varieties: MD-2 Pineapple and Tainong-16. The main component of T1 was diethyl aminoethyl hexanoate (DA-6) and that of T2 is chitosan oligosaccharide (COS). An environment similar to a natural drought was simulated in the drought stress treatments. Then, pineapples at different periods were sampled and a series of indicators were measured. The experimental results showed that the drought treatments treated with T1 and T2 plant growth regulators had a decrease in malondialdehyde, an increase in bromelain and antioxidant enzyme indicators, and an increase in phenotypic and yield indicators. CONCLUSION This experiment demonstrated that DA-6 and COS can enhance the drought resistance of pineapple plants to a certain extent through bromelain and oxidative stress. Therefore, DA-6 and COS have potential applications and this experiment lays the foundation for further research.
Collapse
Affiliation(s)
- XiaoKui Huang
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524000, Guangdong, China
| | - GangShun Rao
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524000, Guangdong, China
| | - XiaoDu Peng
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524000, Guangdong, China
| | - YingBin Xue
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524000, Guangdong, China
| | - HanQiao Hu
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524000, Guangdong, China
| | - NaiJie Feng
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524000, Guangdong, China
- Shenzhen Research Institute, Guangdong Ocean University, Shenzhen, 518000, Guangdong, China
| | - DianFeng Zheng
- College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524000, Guangdong, China.
- Shenzhen Research Institute, Guangdong Ocean University, Shenzhen, 518000, Guangdong, China.
| |
Collapse
|
3
|
Kozyulina PY, Pavlova OA, Kantsurova (Rudaya) ES, Bovin AD, Shirobokova SA, Dolgikh AV, Dymo AM, Dolgikh EA. Transcriptomic analysis of pea plant responses to chitooligosaccharides' treatment revealed stimulation of mitogen-activated protein kinase cascade. FRONTIERS IN PLANT SCIENCE 2023; 14:1092013. [PMID: 36968377 PMCID: PMC10030943 DOI: 10.3389/fpls.2023.1092013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 02/17/2023] [Indexed: 06/18/2023]
Abstract
Since chitooligosaccharides (COs) are water-soluble, biodegradable and nontoxic compounds, their application may be considered as a promising plant-protecting agent. However, the molecular and cellular modes of action of COs are not yet understood. In this study, transcriptional changes in pea roots treated with COs were investigated via RNA sequencing. Pea roots treated with the deacetylated CO8-DA at low concentration (10-5 М) were harvested 24 h after treatment and their expression profiles were compared against medium-treated control plants. We observed 886 differentially expressed genes (fold change ≥ 1; p-value < 0.05) 24 h after treatment with CO8-DA. Gene Ontology term over-representation analysis allowed us to identify the molecular functions of the genes activated in response to CO8-DA treatment and their relation to biological processes. Our findings suggest that calcium signaling regulators and MAPK cascade play a key role in pea plant responses to treatment. Here we found two MAPKKKs, the PsMAPKKK5 and PsMAPKKK20, which might function redundantly in the CO8-DA-activated signaling pathway. In accordance with this suggestion, we showed that PsMAPKKK knockdown decreases resistance to pathogenic Fusarium culmorum fungi. Therefore, analysis showed that typical regulators of intracellular signal transduction pathways involved in triggering of plant responses via CERK1 receptors to chitin/COs in Arabidopsis and rice may also be recruited in legume pea plants.
Collapse
|
4
|
Zheng J, Huang X, Li J, He Q, Zhao W, Zeng C, Chen H, Zhan Q, Xu Z. Enhanced biomass and thermotolerance of Arabidopsis by SiERECTA isolated from Setaria italica L. PeerJ 2022; 10:e14452. [PMID: 36518287 PMCID: PMC9744159 DOI: 10.7717/peerj.14452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 11/01/2022] [Indexed: 12/04/2022] Open
Abstract
Foxtail millet is commonly used as a food and forage grass. ERECTA (ER) is a receptor-like kinase that can improve plant biomass and stress resistance. The sorghum SbER10_X1 gene was used as a probe to identify ER family genes on the Setaria italica genomes (SiERs), and determine the characteristics of the SiERs family. Herein, the structural features, expression patterns, and thermotolerance of SiERs function were identified by bioinformatics analysis, real-time PCR and transgenesis estimation. Results showed that SiERs had four members: two members were located on chromosome 1 with a total of six copies (SiER1_X1, SiER1_X2, SiER1_X3, SiER1_X4, SiER1_X5, and SiER1_X6), and two were on chromosome 4, namely, SiER4 (SiER4_X1 and SiER4_X2) and SiERL1. Among them, SiER1_X4 and SiER4_X1 were expressed highest in above-ground organs of foxtail millet, and actively responded to treatments with abscisic acid, brassinolide, gibberellin, and indole acetic acid. After overexpression of SiER1_X4 and SiER4_X1 in Arabidopsis, the plant height and biomass of the transgenic Arabidopsis significantly increased. Following high-temperature treatment, transgenic seedlings survived better compared to wild type. Transgenic lines showed higher SOD and POD activities, and expression level of AtHSF1 and AtBl1 genes significantly increased. These results indicated that SiER1_X4 and SiER4_X1 played important regulatory roles in plant growth and thermotolerance. The two genes provide potential targets for conventional breeding or biotechnological intervention to improve the biomass of forage grass and thermotolerance of field crops.
Collapse
Affiliation(s)
- Jiacheng Zheng
- Anhui Science and Technology University, College of Agronomy, Fengyang, Anhui, China,Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Institute of Crop Science, Beijing, China
| | - Xiaoyi Huang
- Anhui Science and Technology University, College of Agronomy, Fengyang, Anhui, China
| | - Jieqin Li
- Anhui Science and Technology University, College of Agronomy, Fengyang, Anhui, China
| | - Qingyuan He
- Anhui Science and Technology University, College of Agronomy, Fengyang, Anhui, China
| | - Wan Zhao
- Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Institute of Crop Science, Beijing, China
| | - Chaowu Zeng
- Xinjiang Academy of Agricultural Sciences, Institute of Crop Sciences, Urumuqi, Xinjiang, China
| | - Haizhou Chen
- Anhui Youxin Agricultural Science and Technology Co. LTD, Hefei, Anhui, China
| | - Qiuwen Zhan
- Anhui Science and Technology University, College of Agronomy, Fengyang, Anhui, China
| | - Zhaoshi Xu
- Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Institute of Crop Science, Beijing, China
| |
Collapse
|
5
|
Kahraman N, Pehlivan N. Harboured cation/proton antiporters modulate stress response to integrated heat and salt via up-regulating KIN1 and GOLS1 in double transgenic Arabidopsis. FUNCTIONAL PLANT BIOLOGY : FPB 2022; 49:1070-1084. [PMID: 36031594 DOI: 10.1071/fp21334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 08/02/2022] [Indexed: 06/15/2023]
Abstract
Recent research has pointed to improved salt tolerance by co-overexpression of Arabidopsis thaliana NHX1 (Na+ /H+ antiporter) and SOS1 (Salt Overly Sensitive1). However, functionality under salt stress accompanying heat is less understood in double transgenics. To further advance possible co-operational interactions of AtNHX1 (N) and AtSOS1 (S) under combined stress, modulation of osmolyte, redox, energy, and abscisic acid metabolism genes was analysed. The expression of the target BIP3 , KIN1 , GOLS1 , OHP2 , and CYCA3;2 in transgenic Arabidopsis seedlings were significantly regulated towards a dramatic suppression by ionic, osmotic, and heat stresses. AtNHX1 and AtSOS1 co-overexpression (NS) outpaced the single transgenics and control in terms of membrane disorganisation and the electrolyte leakage of the cell damage caused by heat and salt stress in seedlings. While NaCl slightly induced CYCA3;2 in transgenics, combined stress up-regulated KIN1 and GOLS1 , not other genes. Single N and S transgenics overexpressing AtNHX1 and AtSOS1 only appeared similar in their growth and development; however, different to WT and NS dual transgenics under heat+salt stress. Seed germination, cotyledon survival, and hypocotyl length were less influenced by combined stress in NS double transgenic lines than in single N and S and wild type. Stress combination caused significant reprogramming of gene expression profiles, mainly towards downregulation, possibly as a trade-off strategy. Analysing phenotypic, cellular, and transcriptional responses regulating growth facets of tolerant transgenic genotypes may support the ongoing efforts to achieve combined salt and heat tolerance.
Collapse
Affiliation(s)
- Nihal Kahraman
- Recep Tayyip Erdogan University, Biology Department, Rize, Turkey
| | - Necla Pehlivan
- Recep Tayyip Erdogan University, Biology Department, Rize, Turkey
| |
Collapse
|