1
|
Zhao Y, Sun T, Liu J, Zhang R, Yu Y, Zhou G, Liu J, Gao B. The Key Role of Plant Hormone Signaling Transduction and Flavonoid Biosynthesis Pathways in the Response of Chinese Pine ( Pinus tabuliformis) to Feeding Stimulation by Pine Caterpillar ( Dendrolimus tabulaeformis). Int J Mol Sci 2024; 25:6354. [PMID: 38928063 PMCID: PMC11203464 DOI: 10.3390/ijms25126354] [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: 05/07/2024] [Revised: 06/01/2024] [Accepted: 06/06/2024] [Indexed: 06/28/2024] Open
Abstract
In nature, plants have developed a series of resistance mechanisms to face various external stresses. As understanding of the molecular mechanisms underlying plant resistance continues to deepen, exploring endogenous resistance in plants has become a hot topic in this field. Despite the multitude of studies on plant-induced resistance, how plants respond to stress under natural conditions remains relatively unclear. To address this gap, we investigated Chinese pine (Pinus tabuliformis) using pine caterpillar (Dendrolimus tabulaeformis) under natural conditions. Healthy Chinese pine trees, approximately 10 years old, were selected for studying induced resistance in Huangtuliangzi Forestry, Pingquan City, Chengde City, Hebei Province, China. Pine needles were collected at 2 h and 8 h after feeding stimulation (FS) via 10 pine caterpillars and leaf clipping control (LCC), to simulate mechanical damage caused by insect chewing for the quantification of plant hormones and transcriptome and metabolome assays. The results show that the different modes of treatments significantly influence the contents of JA and SA in time following treatment. Three types of differentially accumulated metabolites (DAMs) were found to be involved in the initial response, namely phenolic acids, lipids, and flavonoids. Weighted gene co-expression network analysis indicated that 722 differentially expressed genes (DEGs) are positively related to feeding stimulation and the specific enriched pathways are plant hormone signal transduction and flavonoid biosynthesis, among others. Two TIFY transcription factors (PtTIFY54 and PtTIFY22) and a MYB transcription factor (PtMYB26) were found to be involved in the interaction between plant hormones, mainly in the context of JA signal transduction and flavonoid biosynthesis. The results of this study provide an insight into how JA activates, serving as a reference for understanding the molecular mechanisms of resistance formation in conifers responding to mandibulate insects.
Collapse
Affiliation(s)
- Yanan Zhao
- College of Forestry, Hebei Agricultural University, Baoding 071000, China; (Y.Z.); (T.S.); (R.Z.); (Y.Y.); (G.Z.); (J.L.)
| | - Tianhua Sun
- College of Forestry, Hebei Agricultural University, Baoding 071000, China; (Y.Z.); (T.S.); (R.Z.); (Y.Y.); (G.Z.); (J.L.)
| | - Jie Liu
- College of Agronomy, Hebei Agricultural University, Baoding 071000, China;
| | - Ruibo Zhang
- College of Forestry, Hebei Agricultural University, Baoding 071000, China; (Y.Z.); (T.S.); (R.Z.); (Y.Y.); (G.Z.); (J.L.)
| | - Yongjie Yu
- College of Forestry, Hebei Agricultural University, Baoding 071000, China; (Y.Z.); (T.S.); (R.Z.); (Y.Y.); (G.Z.); (J.L.)
| | - Guona Zhou
- College of Forestry, Hebei Agricultural University, Baoding 071000, China; (Y.Z.); (T.S.); (R.Z.); (Y.Y.); (G.Z.); (J.L.)
| | - Junxia Liu
- College of Forestry, Hebei Agricultural University, Baoding 071000, China; (Y.Z.); (T.S.); (R.Z.); (Y.Y.); (G.Z.); (J.L.)
| | - Baojia Gao
- College of Forestry, Hebei Agricultural University, Baoding 071000, China; (Y.Z.); (T.S.); (R.Z.); (Y.Y.); (G.Z.); (J.L.)
| |
Collapse
|
2
|
Liu Y, Ge L, Tang H, Zheng J, Hu J, Wang J, Yang X, Zhang R, Wang X, Li X, Zhang Y, Shi Q. cGMP functions as an important messenger involved in SlSAMS1-regulated salt stress tolerance in tomato. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 204:108097. [PMID: 37864930 DOI: 10.1016/j.plaphy.2023.108097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 10/04/2023] [Accepted: 10/12/2023] [Indexed: 10/23/2023]
Abstract
Salt stress adversely affects the growth, development, and yield of tomato (Solanum lycopersicum). SAM Synthetase (SAMS), which is responsible for the biosynthesis of S-adenosylmethionine (SAM, a precursor of polyamine biosynthesis), participates in plant response to abiotic stress. However, the regulatory mechanism of SAMS-mediated salt stress tolerance remains elusive. In this study, we characterized a SAMS homologue SlSAMS1 in tomato. We found that SlSAMS1 is highly expressed in tomato roots, and its expression can be induced by salt stress. Crucially, overexpression of SlSAMS1 in tomato enhances salt stress tolerance. Through metabolomic profiling, we identified some differentially accumulated metabolites, especially, a secondary messenger guanosine 3',5'-cyclic monophosphate (cGMP) which may play a key role in SlSAMS1-regulated salt tolerance. A series of physiological and biochemical data suggest that cGMP alleviates salt stress-induced growth inhibition, and potentially acts downstream of the polyamine-nitric oxide (PA-NO) signaling pathway to trigger H2O2 signaling in response to salt stress. Taken together, the study reveals that SlSAMS1 regulates tomato salt tolerance via the PA-NO-cGMP-H2O2 signal module. Our findings elucidate the regulatory pathway of SlSAMS1-induced plant response to salt stress and indicate a pivotal role of cGMP in salt tolerance.
Collapse
Affiliation(s)
- Yue Liu
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Lianjing Ge
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Huimeng Tang
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Jinhui Zheng
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Jinxiang Hu
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Jingru Wang
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Xiaoyu Yang
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Ruimin Zhang
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Xiaoyun Wang
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Xiuming Li
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China
| | - Yan Zhang
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China.
| | - Qinghua Shi
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, 271018, Shandong, PR China.
| |
Collapse
|
3
|
Chen Z, Guo Z, Xu N, Cao X, Niu J. Graphene nanoparticles improve alfalfa (Medicago sativa L.) growth through multiple metabolic pathways under salinity-stressed environment. JOURNAL OF PLANT PHYSIOLOGY 2023; 289:154092. [PMID: 37716315 DOI: 10.1016/j.jplph.2023.154092] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Revised: 09/03/2023] [Accepted: 09/09/2023] [Indexed: 09/18/2023]
Abstract
Graphene, one of the emerging carbon nanomaterials, has many advantages and applications. Salinity stress seriously affects ecology and agroforestry worldwide. The effects of graphene on alfalfa under salinity stress were investigated. The results indicated that graphene promoted alfalfa growth under non-salinity stress but caused some degree of damage to root cells and leaf parameters. Graphene used in salinity stress had a positive effect on growth parameters, chlorophyll, photosynthetic gas parameters, stomatal opening, ion balance, osmotic homeostasis, cell membrane integrity and antioxidant system, while it decreased Na+, lipid peroxidation and reactive oxygen species levels. Correlation analysis revealed that most of the parameters were significantly correlated; and principal component analysis indicated that the first two dimensions (78.1% and 4.1%) explained 82.2% of the total variability, and the majority of them exceeded the average contribution. Additionally, Gene Ontology functional enrichment analysis and Kyoto Encyclopedia of Genes and Genomes signaling pathway enrichment analysis showed that there were numerous differentially expressed genes and pathways to regulate alfalfa responding to salinity stress. Taken together, the findings reveal that graphene does not enter the plant, but improves the properties and adsorption of soil to enhance salt tolerance and seedling growth of alfalfa through morphological, physiological, biochemical, and transcriptomic aspects. Furthermore, this study provides a reference for the application of graphene to improve soil environment and agricultural production.
Collapse
Affiliation(s)
- Zhao Chen
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, 225009, China
| | - Zhipeng Guo
- College of Grassland Agriculture, Northwest A&F University, Yangling, 712100, China
| | - Nan Xu
- College of Grassland Agriculture, Northwest A&F University, Yangling, 712100, China
| | - Xinlong Cao
- College of Grassland Agriculture, Northwest A&F University, Yangling, 712100, China
| | - Junpeng Niu
- College of Grassland Agriculture, Northwest A&F University, Yangling, 712100, China.
| |
Collapse
|
4
|
Sethu Madhavan A, Montanez Hernandez LE, Gu ZR, Subramanian S. Effect of graphene on soybean root colonization by Bradyrhizobium strains. PLANT DIRECT 2023; 7:e522. [PMID: 37671087 PMCID: PMC10475502 DOI: 10.1002/pld3.522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 07/11/2023] [Accepted: 08/01/2023] [Indexed: 09/07/2023]
Abstract
Legume crops such as soybean obtain a large portion of their nitrogen nutrition through symbiotic nitrogen fixation by diazotrophic rhizobia bacteria in root nodules. However, nodule occupancy by low-capacity nitrogen-fixing rhizobia can lead to lower-than-optimal levels of nitrogen fixation. Seed/root coating with engineered materials such as graphene-carrying biomolecules that may promote specific attraction/attachment of desirable bacterial strains is a potential strategy that can help overcome this rhizobia competition problem. As a first step towards this goal, we assessed the impact of graphene on soybean and Bradyrhizobium using a set of growth, biochemical, and physiological assays. Three different concentrations of graphene were tested for toxicity in soybean (50, 250, and 1,000 mg/l) and Bradyrhizobia (25, 50, and 100 mg/l). Higher graphene concentrations (250 mg/l and 1,000 mg/l) promoted seed germination but slightly delayed plant development. Spectrometric and microscopy assays for hydrogen peroxide and superoxide anion suggested that specific concentrations of graphene led to higher levels of reactive oxygen species in the roots. In agreement, these roots also showed higher activities of antioxidant enzymes, catalase, and ascorbate peroxidase. Conversely, no toxic effects were detected on Bradyrhizobia treated with graphene, and neither did they have higher levels of reactive oxygen species. Graphene treatments at 250 mg/l and 1,000 mg/l significantly reduced the number of nodules, but rhizobia infection and the overall nitrogenase activity were not affected. Our results show that graphene can be used as a potential vehicle for seed/root treatment.
Collapse
Affiliation(s)
- Athira Sethu Madhavan
- Department of Agronomy, Horticulture and Plant ScienceSouth Dakota State UniversityBrookingsSouth DakotaUSA
| | | | - Zheng Rong Gu
- Department of Agricultural and Biosystems EngineeringSouth Dakota State UniversityBrookingsSouth DakotaUSA
| | - Senthil Subramanian
- Department of Agronomy, Horticulture and Plant ScienceSouth Dakota State UniversityBrookingsSouth DakotaUSA
- Department of Biology and MicrobiologySouth Dakota State UniversityBrookingsSouth DakotaUSA
| |
Collapse
|
5
|
Awashra M, Młynarz P. The toxicity of nanoparticles and their interaction with cells: an in vitro metabolomic perspective. NANOSCALE ADVANCES 2023; 5:2674-2723. [PMID: 37205285 PMCID: PMC10186990 DOI: 10.1039/d2na00534d] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 01/27/2023] [Indexed: 05/21/2023]
Abstract
Nowadays, nanomaterials (NMs) are widely present in daily life due to their significant benefits, as demonstrated by their application in many fields such as biomedicine, engineering, food, cosmetics, sensing, and energy. However, the increasing production of NMs multiplies the chances of their release into the surrounding environment, making human exposure to NMs inevitable. Currently, nanotoxicology is a crucial field, which focuses on studying the toxicity of NMs. The toxicity or effects of nanoparticles (NPs) on the environment and humans can be preliminary assessed in vitro using cell models. However, the conventional cytotoxicity assays, such as the MTT assay, have some drawbacks including the possibility of interference with the studied NPs. Therefore, it is necessary to employ more advanced techniques that provide high throughput analysis and avoid interferences. In this case, metabolomics is one of the most powerful bioanalytical strategies to assess the toxicity of different materials. By measuring the metabolic change upon the introduction of a stimulus, this technique can reveal the molecular information of the toxicity induced by NPs. This provides the opportunity to design novel and efficient nanodrugs and minimizes the risks of NPs used in industry and other fields. Initially, this review summarizes the ways that NPs and cells interact and the NP parameters that play a role in this interaction, and then the assessment of these interactions using conventional assays and the challenges encountered are discussed. Subsequently, in the main part, we introduce the recent studies employing metabolomics for the assessment of these interactions in vitro.
Collapse
Affiliation(s)
- Mohammad Awashra
- Department of Chemistry and Materials Science, School of Chemical Engineering, Aalto University 02150 Espoo Finland
- Department of Biochemistry, Molecular Biology and Biotechnology, Faculty of Chemistry, Wroclaw University of Science and Technology Wroclaw Poland
| | - Piotr Młynarz
- Department of Biochemistry, Molecular Biology and Biotechnology, Faculty of Chemistry, Wroclaw University of Science and Technology Wroclaw Poland
| |
Collapse
|
6
|
Qiao Y, Zhang N, Liu J, Yang H. Interpretation of ametryn biodegradation in rice based on joint analyses of transcriptome, metabolome and chemo-characterization. JOURNAL OF HAZARDOUS MATERIALS 2023; 445:130526. [PMID: 36463741 DOI: 10.1016/j.jhazmat.2022.130526] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 11/06/2022] [Accepted: 11/29/2022] [Indexed: 06/17/2023]
Abstract
Agrochemicals such as pesticide residues become environmental contaminants due to their ecotoxic risks to plant, animal and human health. Ametryn (AME) is a widely used farmland pesticide and its residues are widespread in soils, surface stream and groundwater. However, its toxicological and degradative mechanisms in plants and food crops are largely unknown. This study comprehensively investigated AME toxicology and degradation mechanisms in a paddy crop. AME was freely absorbed by rice roots, translocated to the above-ground and thus repressed plant elongation, and reduced dry weight and chlorophyll concentration, but increased oxidative injury and subcellular electrolyte permeability. Analysis of the transcriptome and metabolome revealed that exposure to AME evoked global AME-responsive genes and step-wise catabolism of AME. We detected 995 (roots) and 136 (shoots) upregulated and differentially expressed genes (DEGs) in response to AME. Metabolomic profiling revealed that many basal metabolites such as carbohydrates, amino acids, glutathione, hormones and phenylpropanoids involved in AME catabolism were accordingly accumulated in rice. Eight metabolites and twelve conjugates of AME were characterized by HPLC-Q-TOF-HRMS/MS. These AME metabolites and conjugates are closely related to DEGs, differentially accumulated metabolites (DAMs) and activities of antioxidative enzymes. Collectively, our work highlights the specific mechanisms for AME degradative metabolism through Phase I and II reactive pathways (e.g. hydroxylation and dealkylation), with will help develop genetically engineered rice used to bioremediate AME-contaminated paddy soils and minimize AME accumulation rice crops.
Collapse
Affiliation(s)
- Yuxin Qiao
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Nan Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, China
| | - Jintong Liu
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, China
| | - Hong Yang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, China.
| |
Collapse
|
7
|
Metabolites and Plant Hormones Related to the Resistance Response to Feeding Stimulation and Leaf Clipping Control in Chinese Pine ( Pinus tabuliformis Carr.). Curr Issues Mol Biol 2023; 45:1086-1099. [PMID: 36826017 PMCID: PMC9955327 DOI: 10.3390/cimb45020072] [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: 11/22/2022] [Revised: 12/25/2022] [Accepted: 12/28/2022] [Indexed: 02/03/2023] Open
Abstract
This experiment was conducted to define changes in metabolic pathways in response to mandibulate insect feeding and to provide a reference for further investigation of the molecular mechanisms underlying the development of conifer resistance. Chinese pine (Pinus tabuliformis Carr.) in good growth status in natural condition was chosen for stimulation by 10 pine caterpillars (Dendrolimus tabulaefomis Tsai et Liu) as feeding stimulation (FS), leaf clipping control (LCC) as mechanical damage, and CK group (with no treatment) (recorded as 0 h). The metabolome and total flavonoid content were measured in the needles at 0, 2, and 8 h after treatment. Plant hormones were measured with needles at 0, 0.5, 1, 1.5, 2, 4, 6, and 8 h after different treatments. The results show that a total of 30.8% flavonoids are identified by metabolomics analysis. Compared with leaf clipping control, feeding stimulation of Chinese pine caterpillars significantly induced the upregulation of metabolites in the flavonoid pathway in Chinese pine, and the plant hormones JA and IAA showed expression trends consistent with those of the metabolome. According to the biological processes of the four plant hormones involved, JA and SA are mostly involved in resistance formation, and in this study, both of them also have fluctuating expressions influenced by feeding stimulation, while the expressions of the growth-related hormones IAA and ABA have no significant changes at other time points except for 1 h after treatment. Thus, the flavonoid pathway is one of the main pathways involved in resistance formation in conifers, and JA and IAA are involved in the formation of resistance.
Collapse
|
8
|
Zhao S, Wang W, Chen X, Gao Y, Wu X, Ding M, Duo L. Graphene oxide affected root growth, anatomy, and nutrient uptake in alfalfa. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 250:114483. [PMID: 36586166 DOI: 10.1016/j.ecoenv.2022.114483] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 12/08/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
The increasing application of carbon nanomaterials has resulted in their inevitable release into the environment. Their toxic effects on plant roots require careful investigation. In the present study, alfalfa (Medicago sativa L.) was exposed to graphene oxide (GO) at levels of 0.2 %, 0.4 %, and 0.6 % (w/w) in potting soil. This study aims to better understand the impact of GO on the root growth, structure, and physiology of alfalfa in the soil matrix. The results demonstrated that GO significantly affected the development and structure of alfalfa roots, and the effect varied with GO level. The highest level of GO (0.6 %) reduced the root length, diameter, volume, dry weight, number of lateral roots, and root activity by 36.1 %, 31.3 %, 60.0 %, 89.6 %, 55.8 %, and 72.3 % (p < 0.05), respectively, and the vascular cylinder diameter, periderm thickness, vessel diameter, and phellem thickness decreased by 51.5 %, 50.7 %, 80.9 %, and 49.1 % (p < 0.05), respectively. These observations might be associated with GO-induced oxidative stress, which was indicated by the activity of antioxidant enzymes. Furthermore, high GO levels (0.4 % and 0.6 %) inhibited the uptake of N, P, K, Mg, Zn, Fe, Mo, Si, and B in roots. Our findings indicate that GO at high levels has a negative impact on root growth and development by inducing oxidative stress, structural impairment, and nutritional imbalance. Careful soil GO management should be emphasized.
Collapse
Affiliation(s)
- Shulan Zhao
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin 300387, China
| | - Wei Wang
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin 300387, China
| | - Xuejiao Chen
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin 300387, China
| | - Yingyue Gao
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin 300387, China
| | - Xiao Wu
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin 300387, China
| | - Mengjia Ding
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin 300387, China
| | - Lian Duo
- Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin 300387, China.
| |
Collapse
|
9
|
Exogenously Applied Rohitukine Inhibits Photosynthetic Processes, Growth and Induces Antioxidant Defense System in Arabidopsis thaliana. Antioxidants (Basel) 2022; 11:antiox11081512. [PMID: 36009231 PMCID: PMC9404761 DOI: 10.3390/antiox11081512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 07/06/2022] [Accepted: 07/19/2022] [Indexed: 12/10/2022] Open
Abstract
The secondary metabolite rohitukine has been reported in only a few plant species, including Schumanniophyton magnificum, S. problematicum, Amoora rohituka, Dysoxylum acutangulum and D. gotadhora. It has several biological activities, such as anticancer, anti-inflammatory, antiadipogenic, immunomodulatory, gastroprotective, anti-implantation, antidyslipidemic, anti-arthritic and anti-fertility properties. However, the ecological and physiological roles of rohitukine in parent plants have yet to be explored. Here for the first time, we tried to decipher the physiological effect of rohitukine isolated from D. gotadhora on the model system Arabidopsis thaliana. Application of 0.25 mM and 0.5 mM rohitukine concentrations moderately affected the growth of A. thaliana, whereas a remarkable decrease in growth and the alteration of various morphological, physiological and biochemical mechanisms were observed in plants that received 1.0 mM of rohitukine as compared to the untreated control. A. thaliana showed considerable dose-dependent decreases in leaf area, fresh weight and dry weight when sprayed with 0.25 mM, 0.5 mM and 1.0 mM of rohitukine. Rohitukine exposure resulted in the disruption of photosynthesis, photosystem II (PSII) activity and degradation of chlorophyll content in A. thaliana. It also triggered oxidative stress in visualized tissues through antioxidant enzyme activity and the expression levels of key genes involved in the antioxidant system, such as superoxide dismutase (SOD), peroxidase (POD) and ascorbate peroxidase (APX). Rohitukine-induced changes in levels of metabolites (amino acids, sugars, organic acids, etc.) were also assessed. In light of these results, we discuss (i) the likely ecological importance of rohitukine in parent plants as well as (ii) the comparison of responses to rohitukine treatment in plants and mammals.
Collapse
|
10
|
Kareem HA, Hassan MU, Zain M, Irshad A, Shakoor N, Saleem S, Niu J, Skalicky M, Chen Z, Guo Z, Wang Q. Nanosized zinc oxide (n-ZnO) particles pretreatment to alfalfa seedlings alleviate heat-induced morpho-physiological and ultrastructural damages. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 303:119069. [PMID: 35276246 DOI: 10.1016/j.envpol.2022.119069] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 02/11/2022] [Accepted: 02/25/2022] [Indexed: 05/27/2023]
Abstract
Global efforts are in rapid progress to tackle the emerging conundrum of climate change-induced heat stress in grassland ecosystems. Zinc oxide nanoparticles (n-ZnO) are known to play a crucial role in plants' abiotic stress regulation, but its response in alfalfa against heat stress has not been explored. This study aimed at assessing the effects of n-ZnO on alfalfa under heat stress by various morpho-physiological and cellular approaches. Five-week-old alfalfa seedlings were subjected to foliar application of n-ZnO as a pretreatment before the onset of heat stress (BHS) to evaluate its effect on heat tolerance, and as a post-treatment after heat stress (AHS) to evaluate recovery efficiency. In vitro studies on Zn release from n-ZnO by Inductively coupled plasma mass spectroscopy (ICPMS) disclosed that the particle uptake and Zn release were concentration dependent. The uptake and translocation of n-ZnO examined by transmission electron microscope (TEM) reveling showed that n-ZnO was primarily localized in the vacuoles and chloroplasts. TEM images showed that ultrastructural modifications to chloroplast, mitochondria, and cell wall were reversible by highest dose of n-ZnO applied before heat stress, and damages to these organelles were not recoverable when n-ZnO was applied after heat stress. The results further enlightened that 90 mg L-1 n-ZnO better prevented the heat stress-mediated membrane damage, lipid peroxidation and oxidative stress by stimulating antioxidant systems and enhancing osmolyte contents in both BHS and AHS. Although, application of 90 mg L-1 n-ZnO in BHS was more effective in averting heat-induced damages and maintaining better plant growth and morpho-physiological attributes compared to AHS. Conclusively, foliar application of n-ZnO can be encouraged as an effective strategy to protect alfalfa from heat stress damages while minimizing the risk of nanoparticle transmission to environmental compartments, which could happen with soil application.
Collapse
Affiliation(s)
- Hafiz Abdul Kareem
- College of Grassland Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Mahmood Ul Hassan
- College of Grassland Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Muhammad Zain
- Key Laboratory of Crop Water Use and Regulation, Ministry of Agriculture and Rural Affairs/Institute of Farmland Irrigation, Chinese Academy of Agricultural Sciences, Xinxiang, Henan, PR China; Graduate School of Chinese Academy of Agricultural Sciences, Beijing, PR China
| | - Annie Irshad
- College of Grassland Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Noman Shakoor
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
| | - Sana Saleem
- Department of Vegetable Science, College of Horticulture, Northwest A&F University, Yangling, 712100, China
| | - Junpeng Niu
- College of Grassland Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Milan Skalicky
- Department of Botany and Plant Physiology, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamycka 129, 165 00, Prague, Czech Republic
| | - Zhao Chen
- College of Grassland Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Zhipeng Guo
- College of Grassland Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Quanzhen Wang
- College of Grassland Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, China.
| |
Collapse
|