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Wang X, Li C, Huang S, Gao H, Li Y, Chen X, Huang L, Luo J, Zhou X, Zhang L. Pathogenic and Comparative Genomic Analysis of Ralstonia pseudosolanacearum Isolated from Casuarina. Plant Dis 2024. [PMID: 38687570 DOI: 10.1094/pdis-01-24-0118-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Casuarina equisetifolia is crucial in protecting coastal regions of China against typhoon attacks, but has faced a substantial challenge due to wilt disease caused by pathogens of the Ralstonia solanacearum species complex (RSSC). Although the initial outbreak of Casuarina wilt in 1970s was effectively controlled by disease-resistant C. equisetifolia varieties, the disease has recently re-emerged in coastal regions of Guangdong. In this study, we report the isolation, characterization, and comparative genomic analysis of 11 RSSC strains from diseased C. equisetifolia at various locations along the coast of Guangdong. Phylogenomic analysis showed that the strains were closely related and clustered with phylotype I strains previously isolated from peanuts. Single-gene based analysis further suggested these strains could be derived from strains present in Guangdong since the 1980s, indicating a historical context to their current pathogenicity. Casuarina-isolated strains exhibited notably higher virulence against C. equisetifolia and peanuts than representative RSSC strains GMI1000 and EP1, suggesting host-specific adaptations which possibly contributed to the recent outbreak. Comparative genomic analysis among RSSC strains revealed a largely conserved genome structure and high levels of conservation in gene clusters encoding extracellular polysaccharides biosynthesis, secretion systems, and quorum sensing regulatory systems. However, we also found a number of unique genes in the Casuarina-isolated strains that were absent in GMI1000 and EP1, and vice versa, pointing to potential genetic factors underpinning their differential virulence. These unique genes offer promising targets for future functional studies. Overall, our findings provide crucial insights into the RSSC pathogens causing Casuarina wilt in Guangdong, guiding future efforts in disease control and prevention.
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Affiliation(s)
- Xiaoqing Wang
- South China Agricultural University, 12526, Guangdong Laboratory of Microbial Signals and Disease Control, South China Agricultural University,Guangzhou City,Guangdong Province, Guangzhou, Guangdong, China, 236500;
| | | | | | | | - Yonglin Li
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, , , , China, 510642;
| | - Xuemei Chen
- South China Agricultural University, 12526, 483 Wushan road, Guangzhou, China, 510642;
| | | | | | - Xiaofan Zhou
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, 404 Keji Building, South China Agricultural University, Guangzhou, China, 510642;
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Wang Y, Wang Y, Li J, Cai Y, Hu M, Lin W, Wu Z. Effects of continuous monoculture on rhizosphere soil nutrients, growth, physiological characteristics, hormone metabolome of Casuarina equisetifolia and their interaction analysis. Heliyon 2024; 10:e26078. [PMID: 38384578 PMCID: PMC10878944 DOI: 10.1016/j.heliyon.2024.e26078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 02/03/2024] [Accepted: 02/07/2024] [Indexed: 02/23/2024] Open
Abstract
Continuous planting is unavoidable in agricultural production, but continuous planting affects plant growth and physiological characteristics. In this study, we analyzed rhizosphere soil nutrients, physiological characteristics, hormone metabolome changes and their interactions of Casuarina equisetifolia (C. equisetifolia) with the increase of continuous planting number. The results found that C. equisetifolia root was significantly inhibited, the plant height was dwarfed and the biomass was significantly reduced as continuous planting number increased. Secondly, continuous planting caused a decrease in the rhizosphere soil nutrient transformation capacity, and a significant decrease in the total soil nutrient and available nutrient content. Analysis of physiological indexes showed that continuous planting resulted in a decrease in nitrogen, phosphorus, and potassium content, a decrease in the activity of physiological indexes of resistance, and a decrease in photosynthetic capacity of C. equisetifolia leaves. Hormone metabolome analysis showed that continuous planting critically affected the accumulation of five characteristic hormones in C. equisetifolia leaves, in which salicylic acid 2-O-β-glucoside (SAG), 2-oxindole-3-acetic acid (OxIAA), trans-zeatin-O-glucoside (tZOG) and gibberellin A3 (GA3) content decreased significantly while abscisic acid (ABA) content increased significantly. In conclusion, continuous planting lowered the rhizosphere soil nutrient transformation capacity of C. equisetifolia, lowered the soil available nutrient content, inhibited their root growth, and hindered the nutrient uptake and transportation by the root, thus led to the decrease of the nutrient accumulation capacity in the leaves of C. equisetifolia, and the decrease of SAG, OxIAA, and tZOG, GA3 synthesis ability decreased, ABA accumulated in large quantities, C. equisetifolia resistance and photosynthesis ability decreased, and their growth was impeded. This study provides insights for the effective management of continuous planting in the cultivation of C. equisetifolia.
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Affiliation(s)
- Yuhua Wang
- College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yuchao Wang
- College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Jianjuan Li
- Fujian Academy of Forestry Survey and Planning, Fuzhou, 350002, China
| | - Yuhong Cai
- College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Mingyue Hu
- College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Wenxiong Lin
- College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Zeyan Wu
- College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
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Wang Y, Li J, Li M, Jia X, Cai Y, Hu M, Zhang Q, Cheng P, Lin S, Lin W, Wang H, Wu Z. Effect of continuous planting on Casuarina equisetifolia rhizosphere soil physicochemical indexes, microbial functional diversity and metabolites. Front Plant Sci 2023; 14:1288444. [PMID: 38155858 PMCID: PMC10752937 DOI: 10.3389/fpls.2023.1288444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 11/30/2023] [Indexed: 12/30/2023]
Abstract
Continuous planting has a severe impact on the growth of Casuarina equisetifolia. In this study, the effects of three different long-term monocultures (one, two and three replanting) on the physicochemical indexes, microbial functional diversity, and soil metabolomics were analyzed in C. equisetifolia rhizosphere soil. The results showed that rhizosphere soil organic matter content, cation exchange capacity, total and available nitrogen, total and available phosphorus, and total and available potassium contents significantly decreased with the increasing number of continuous plantings. The evaluation of microbial functional diversity revealed a reduction in the number of soil microorganisms that rely on carbohydrates for carbon sources and an increase in soil microorganisms that used phenolic acid, carboxylic acid, fatty acid, and amines as carbon sources. Soil metabolomics analysis showed a significant decrease in soil carbohydrate content and a significant accumulation of autotoxic acid, amine, and lipid in the C. equisetifolia rhizosphere soil. Consequently, the growth of C. equisetifolia could hinder total nutrient content and their availability. Thus, valuable insights for managing the cultivation of C. equisetifolia and soil remediation were provided.
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Affiliation(s)
- Yuhua Wang
- College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Jianjuan Li
- Editorial Department, Fujian Academy of Forestry Survey and Planning, Fuzhou, China
| | - Mingzhe Li
- College of Life Science, Longyan University, Longyan, China
| | - Xiaoli Jia
- College of Tea and Food, Wuyi University, Wuyishan, China
| | - Yuhong Cai
- College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Mingyue Hu
- College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Qingxu Zhang
- College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Pengyuan Cheng
- College of Life Science, Longyan University, Longyan, China
| | - Shaoxiong Lin
- College of Life Science, Longyan University, Longyan, China
| | - Wenxiong Lin
- College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Haibin Wang
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
- College of Life Science, Longyan University, Longyan, China
| | - Zeyan Wu
- College of JunCao Science and Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
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Salsinha YCF, Rini DS, Indradewa D, Rachmawati D, Alam T, Purwestri YA. Exogenously applied Casuarina equisetifolia leaf extracts act as an osmoprotectant on proline accumulation under drought stress in local rice from Indonesia. Front Plant Sci 2023; 14:1210241. [PMID: 37600188 PMCID: PMC10437820 DOI: 10.3389/fpls.2023.1210241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Accepted: 07/07/2023] [Indexed: 08/22/2023]
Abstract
The effects of exogenously supplied osmoprotectants in crops have not yet been extensively studied. In this study, an osmoprotectant containing a high concentration of proline (2.5 g mol-1 FW) was obtained from a Casuarina equisetifolia leaf extract. The effect of the extract was evaluated in local Indonesian rice cultivars Boawae Seratus Malam (BSM), Gogo Jak (GJ), Situ Bagendit (SB) (drought-tolerant), Kisol Manggarai (KM) and Ciherang (drought-susceptible) cultivars under drought at the morphological, physiological, and genetic levels. Under drought, the KM showed an increased level of OsWRKY, OsNAC, OsDREB1A, and OsDREB2A expression after application of the osmoprotectant, leading to the activation of proline synthesis genes including OsP5CS1, OsP5CR, and OsProDH, while the tolerant cultivars (BSM, GJ, and SB) showed no difference. The content of chlorophyll, carotenoids, anthocyanins, ascorbate peroxidase, catalase, and superoxide dismutase activities also increased in GJ and KM, during drought stress and applied osmoprotectants, but remained low in the BSM. We conclude that the foliar application of osmoprotectants derived from C.equisetifolia caused an accumulation of proline in susceptible plants. The existence of these extracts stabilizes leaf cells and supports photosynthetic compartments and carbon assimilation in plants, leading to growth.
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Affiliation(s)
- Yustina Carolina Febrianti Salsinha
- Research Center for Genetic Engineering, National Research and Innovation Agency, Bogor, West Java, Indonesia
- Research Center for Biotechnology, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Dwi Setyo Rini
- Research Center for Genetic Engineering, National Research and Innovation Agency, Bogor, West Java, Indonesia
| | - Didik Indradewa
- Department of Agronomy, Faculty of Agriculture, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Diah Rachmawati
- Department of Tropical Biology, Faculty of Biology, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Taufan Alam
- Department of Agronomy, Faculty of Agriculture, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Yekti Asih Purwestri
- Research Center for Biotechnology, Universitas Gadjah Mada, Yogyakarta, Indonesia
- Department of Tropical Biology, Faculty of Biology, Universitas Gadjah Mada, Yogyakarta, Indonesia
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Zhang S, He C, Wei L, Jian S, Liu N. Transcriptome and metabolome analysis reveals key genes and secondary metabolites of Casuarina equisetifolia ssp. incana in response to drought stress. BMC Plant Biol 2023; 23:200. [PMID: 37069496 PMCID: PMC10111710 DOI: 10.1186/s12870-023-04206-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 03/30/2023] [Indexed: 06/19/2023]
Abstract
Casuarina equisetifolia is drought tolerant, salt tolerant, and able to grow in barren environments. It is often used to reduce wind damage, to prevent sand erosion, and to help establish plant communities in tropical and subtropical coastal zones. To determine the basis for its drought tolerance, we conducted transcriptomic and metabolic analyses of young branchlets under a non-drought treatment (D_0h) and 2-, 12-, and 24-h-long drought treatments (D_2h, D_12h, and D_24h). A total of 5033 and 8159 differentially expressed genes (DEGs) were identified in D_2h/D_0h and D_24h/D_0h. These DEGs were involved in plant hormone signal transduction, jasmonic acid (JA) biosynthesis, flavonoid biosynthesis, and phenylpropanoid biosynthesis. A total of 148 and 168 differentially accumulated metabolites (DAMs) were identified in D_12h/D_0h and D_24h/D_0h, which were mainly amino acids, phenolic acids, and flavonoids. In conclusion, C. equisetifolia responds to drought by regulating plant hormone signal transduction and the biosynthesis of JA, flavonoid, and phenylpropanoid. These results increase the understanding of drought tolerance in C. equisetifolia at both transcriptional and metabolic levels and provide new insights into coastal vegetation reconstruction and management.
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Affiliation(s)
- Shike Zhang
- CAS Engineering Laboratory for Vegetation Ecosystem Restoration on Islands and Coastal Zones, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
- College of Life Sciences, Gannan Normal University, Ganzhou, 341000, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chunmei He
- CAS Engineering Laboratory for Vegetation Ecosystem Restoration on Islands and Coastal Zones, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Long Wei
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, Guangzhou, 510520, China
| | - Shuguang Jian
- CAS Engineering Laboratory for Vegetation Ecosystem Restoration on Islands and Coastal Zones, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China.
| | - Nan Liu
- CAS Engineering Laboratory for Vegetation Ecosystem Restoration on Islands and Coastal Zones, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China.
- College of Life Sciences, Gannan Normal University, Ganzhou, 341000, China.
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Wang Y, Zhang Y, Wei Y, Meng J, Zhong C, Fan C. Characterization of HAK protein family in Casuarina equisetifolia and the positive regulatory role of CeqHAK6 and CeqHAK11 genes in response to salt tolerance. Front Plant Sci 2023; 13:1084337. [PMID: 36816483 PMCID: PMC9936244 DOI: 10.3389/fpls.2022.1084337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 12/28/2022] [Indexed: 06/18/2023]
Abstract
The potassium transporter group of the HAK/KUP/KT (high-affinity K+)/KUP (K+ uptake)/KT (K+ transporter) family plays a crucial role in plant growth and development as well as in environmental adaptation such as tolerance to salt stress. HAK/KUP/KT genes and their functions have been characterized for a number of plant species, but they remain unknown for Casuarina equisetifolia, an important tree species for coastal protection in southern China and many other countries. In this study, 25 HAK genes were identified in the C. equisetifolia genome. Their gene structure, conserved motif, phylogeny, and expression were comprehensively and systematically analyzed to understand their functions. All HAK genes were relatively conserved and could be divided into four clusters. The expression level of two particular genes, CeqHAK11 and CeqHAK6, increased significantly with the duration of salt treatment. To further elucidated their function in response to salt stress, subcellular localization, and their functional analysis were developed. Results revealed that CeqHAK11 and CeqHAK6 were localized on the plasma membrane, which mainly mediated high-affinity K+ uptake. Overexpression of CeqHAK6 or CeqHAK11 in Arabidopsis showed higher germination and survival rates and longer root length than wild-type (WT) under salt stress, suggesting that both genes improve tolerance to salt stress. Moreover, CeqHAK6 and CeqHAK11 improved their ability to tolerate salt stress by increasing the K+/Na+ ratio and antioxidant enzyme activities (CAT, POD, and SOD), and decreasing reactive oxygen species (ROS) accumulation. Consequently, CeqHAK6 and CeqHAK11 were verified as potassium transport proteins and could be applied for further molecular breeding for salt tolerance in C. equisetifolia or other crops to increasing salt tolerance.
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Affiliation(s)
- Yujiao Wang
- State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing, China
- Key Laboratory of State Forestry and Grassland Administration on Tropical Forestry, Academy of Forestry, Guangzhou, China
- Specialty Cash Crop Research Laboratory, Cotton Research Institute of Anhui Academy of Agricultural Sciences, Hefei, China
| | - Yong Zhang
- State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing, China
- Key Laboratory of State Forestry and Grassland Administration on Tropical Forestry, Academy of Forestry, Guangzhou, China
| | - Yongcheng Wei
- State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing, China
- Key Laboratory of State Forestry and Grassland Administration on Tropical Forestry, Academy of Forestry, Guangzhou, China
| | - Jingxiang Meng
- State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing, China
- Key Laboratory of State Forestry and Grassland Administration on Tropical Forestry, Academy of Forestry, Guangzhou, China
| | - Chonglu Zhong
- State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing, China
- Key Laboratory of State Forestry and Grassland Administration on Tropical Forestry, Academy of Forestry, Guangzhou, China
| | - Chunjie Fan
- State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing, China
- Key Laboratory of State Forestry and Grassland Administration on Tropical Forestry, Academy of Forestry, Guangzhou, China
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Xu Z, Zuo L, Zhang Y, Huang R, Li L. Is allelochemical synthesis in Casuarina equisetifolia plantation related to litter microorganisms? Front Plant Sci 2022; 13:1022984. [PMID: 36407626 PMCID: PMC9666782 DOI: 10.3389/fpls.2022.1022984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Abstract
Productivity decline of Casuarina equisetifolia plantation and difficulty in natural regeneration remains a serious problem because of allelopathy. Previous studies have confirmed that 2,4-di-tert-butylphenol (2,4-DTBP) are the major allelochemicals of the C. equisetifolia litter exudates. The production of these allelochemicals may derive from decomposition of litter or from the litter endophyte and microorganisms adhering to litter surfaces. In the present study, we aimed to evaluate the correlation between allelochemicals in litter and endophytic and epiphytic fungi and bacteria from litter. A total of 100 fungi and 116 bacteria were isolated from the interior and surface of litter of different forest ages (young, half-mature, and mature plantation). Results showed that the fermentation broth of fungal genera Mycosphaerella sp. and Pestalotiopsis sp., and bacterial genera Bacillus amyloliquefaciens, Burkholderia-Paraburkholderia, and Pantoea ananatis had the strongest allelopathic effect on C. equisetifolia seeds. Allelochemicals, such as 2,4-DTBP and its analogs were identified in the fermentation broths of these microorganisms using GC/MS analysis. These results indicate that endophytic and epiphytic fungi and bacteria in litters are involved in the synthesis of allelochemicals of C. equisetifolia. To further determine the abundance of the allelopathic fungi and bacteria, Illumina MiSeq high-throughput sequencing was performed. The results showed that bacterial genera with strong allelopathic potential were mainly distributed in the young and half-mature plantation with low abundance, while the abundance of fungal genera Mycosphaerella sp. and Pestalotiopsis sp. were higher in the young and mature plantations. In particular, the abundance of Mycosphaerella sp. in the young and mature plantations were 501.20% and 192.63% higher than in the half-mature plantation, respectively. Overall, our study demonstrates that the litter fungi with higher abundance in the young and mature plantation were involved in the synthesis of the allelochemical 2,4-DTBP of C. equisetifolia. This finding may be important for understanding the relationship between autotoxicity and microorganism and clarifying the natural regeneration problem of C. equisetifolia.
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Lin Q, Wang Y, Li M, Xu Z, Li L. Ecological niche selection shapes the assembly and diversity of microbial communities in Casuarina equisetifolia L. Front Plant Sci 2022; 13:988485. [PMID: 36340378 PMCID: PMC9632346 DOI: 10.3389/fpls.2022.988485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Abstract
The plant microbiome profoundly affects many aspects of host performance; however, the ecological processes by which plant hosts govern microbiome assembly, function, and dispersal remain largely unknown. Here, we investigated the bacterial and fungal communities in multiple compartment niches (bulk soil, rhizosphere soil, root endosphere, phylloplane, and leaf endosphere) of Casuarina equisetifolia L. at three developmental stages in Hainan Province, China. We found that microbiome assemblages along the soil-plant continuum were shaped by the compartment niches. Bacterial diversity and richness decreased from the soils to roots to leaves, with the highest network complexity found in the roots and the lowest found in the phylloplane. However, fungal diversity gradually increased from the soils to roots to phyllosphere, whereas fungal richness decreased from the soils to roots but increased from the roots to phyllosphere; the greatest network complexity was found in bulk soils and the lowest was found in the roots. Different biomarker taxa occurred in the different ecological niches. Bacterial and fungal communities exhibited distinct ecological functions; the former played important roles in maintaining plant growth and providing nutrients, whereas the latter predominantly decomposed organic matter. The bacterial community of C. equisetifolia mostly originated from bulk soil, whereas the fungal community was mainly derived from rhizosphere soil and air. Leaf endophytes were positively correlated with organic carbon, and root and soil microorganisms were positively correlated with total nitrogen, total phosphorus, and total potassium. Our findings provide empirical evidence for plant-microbiome interactions and contribute to future research on non-crop management and the manipulation of non-crop microbiomes.
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Ahmad Z, Yadav V, Shahzad A, Emamverdian A, Ramakrishnan M, Ding Y. Micropropagation, encapsulation, physiological, and genetic homogeneity assessment in Casuarina equisetifolia. Front Plant Sci 2022; 13:905444. [PMID: 36061770 PMCID: PMC9436273 DOI: 10.3389/fpls.2022.905444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
Casuarina equisetifolia is an important tree of the forest, cultivated in tropical and subtropical regions, providing fuelwood, land reclamation, dune stabilization, paper production, and nitrogen fixation. We have developed a systematic in vitro propagation protocol in C. equisetifolia using nodal segments (NS). Murashige and Skoog (MS) medium augmented with BA (5.0 μM) and NAA (0.5 μM) gave rise to a maximum of 32.00 ± 0.31 shoots per explant (S/E) with shoot length (SL) of 3.94 ± 0.02 cm, and a maximum of 70% regeneration potential (RP) was recorded after 8 weeks of post inoculation. For root induction, in vitro derived shoots were transferred to the nutrient medium consisting of a half-strength (½) MS medium augmented with 2.5 μM NAA, which produced a maximum of 12.68 ± 0.33 roots/shoot (R/S) with 3.04 ± 0.50 cm root length (RL) in 60% of culture after 6 weeks. Micropropagated plants with healthy shoots and roots were successfully acclimatized in vermicompost + garden soil + sand (1:2:1) and a maximum survival percentage of 95.1% was recorded. NS was taken from a 6-weeks-old in vitro derived plant of C. equisetifolia for synthetic seed production, and it was reported that CaCl2 · 2H2O (100 mM) + Na2-alginate (4%) resulted in clear and uniform beads. Furthermore, the maximum conversion of synthetic seeds into plantlets occurred over a period of 4 weeks of storage at 4°C. Scanning Electron Microscopy (SEM) revealed the formation of direct shoot buds without any intermediate callus formation. In addition, the chlorophyll and carotenoid contents of the direct regenerated and mother plant were compared. Similarly, RAPD and ISSR primers were used for genetic homogeneity assessment of the direct regenerated plants, where a total of 18 and 19, respectively, clear and reproducible bands with 100% monomorphism were recorded. The developed micropropagation protocol can certainly be used for large-scale multiplication and germplasm preservation of C. equisetifolia. It will also help in meeting the growing demands of C. equisetifolia in the forest industry.
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Affiliation(s)
- Zishan Ahmad
- Co-Innovation Centre for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
- Bamboo Research Institute, Nanjing Forestry University, Nanjing, China
| | - Vikas Yadav
- Plant Biotechnology Section, Department of Botany, Aligarh Muslim University, Aligarh, India
| | - Anwar Shahzad
- Plant Biotechnology Section, Department of Botany, Aligarh Muslim University, Aligarh, India
| | - Abolghassem Emamverdian
- Co-Innovation Centre for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
- Bamboo Research Institute, Nanjing Forestry University, Nanjing, China
| | - Muthusamy Ramakrishnan
- Co-Innovation Centre for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
- Bamboo Research Institute, Nanjing Forestry University, Nanjing, China
| | - Yulong Ding
- Co-Innovation Centre for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
- Bamboo Research Institute, Nanjing Forestry University, Nanjing, China
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Ren H, Xu Y, Zhao X, Zhang Y, Hussain J, Cui F, Qi G, Liu S. Optimization of Tissue Culturing and Genetic Transformation Protocol for Casuarina equisetifolia. Front Plant Sci 2022; 12:784566. [PMID: 35126414 PMCID: PMC8814579 DOI: 10.3389/fpls.2021.784566] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 12/02/2021] [Indexed: 06/14/2023]
Abstract
Casuarina equisetifolia is widely used in agroforestry plantations for soil stabilization, ecosystem rehabilitation, reclamation, and coastal protection. Moreover, C. equisetifolia has remarkable resistance to typhoons, desert, low soil fertility, drought, and salinity, but not cold. Therefore, it is significant to breed high-quality Casuarina varieties to improve the tolerance and adaptability to cold weather by molecular techniques. The establishment of a rapid and efficient callus induction and regeneration system via tissue culture is pre-requisite for the genetic transformation of C. equisetifolia, which is so far lacking. In this study, we reported an efficient and rapid regeneration system using stem segment explants, in which callus induction was found to be optimal in a basal medium supplemented with 0.1 mg⋅L-1 TDZ and 0.1 mg⋅L-1 NAA, and proliferation in a basal medium containing 0.1 mg⋅L-1 TDZ and 0.5 mg⋅L-1 6-BA. For bud regeneration and rooting, the preferred plant growth regulator (PGR) in basal medium was 0.5 mg⋅L-1 6-BA, and a combination of 0.02 mg⋅L-1 IBA and 0.4 mg⋅L-1 IAA, respectively. We also optimized genetic a transformation protocol using Agrobacterium tumefaciens harboring the binary vector pCAMBIA1301 with β-glucuronidase (GUS) as a reporter gene. Consequently, 5 mg L-1 hygromycin, 20 mg L-1 acetosyringone (As), and 2 days of co-cultivation duration were optimized to improve the transformation efficiency. With these optimized parameters, transgenic plants were obtained in about 4 months. Besides that, Agrobacterium rhizogenes-mediated transformation involving adventitious root induction was also optimized. Our findings will not only increase the transformation efficiency but also shorten the time for developing transgenic C. equisetifolia plants. Taken together, this pioneer study on tissue culturing and genetic transformation of C. equisetifolia will pave the way for further genetic manipulation and functional genomics of C. equisetifolia.
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Affiliation(s)
- Huimin Ren
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Yan Xu
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Xiaohong Zhao
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Yan Zhang
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Jamshaid Hussain
- Department of Biotechnology, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Fuqiang Cui
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Guoning Qi
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
| | - Shenkui Liu
- State Key Laboratory of Subtropical Silviculture, School of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, China
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Chandarana H, Senthil Kumar P, Seenuvasan M, Anil Kumar M. Kinetics, equilibrium and thermodynamic investigations of methylene blue dye removal using Casuarina equisetifolia pines. Chemosphere 2021; 285:131480. [PMID: 34265726 DOI: 10.1016/j.chemosphere.2021.131480] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/02/2021] [Accepted: 07/06/2021] [Indexed: 06/13/2023]
Abstract
Casuarina equisetifolia pines are degradable biopolymeric substance with dye-sequestering property was utilized as biosorbent to expel a cationic dye; methylene blue dye from simulated wastewater. The prepared adsorbent material was characterized for their structural, morphological and elemental features to understand their suitability in augmenting in dye-wastewater remediation. The results infer that 0.5 g/L biosorbent was proficient in removing 100 mg/L methylene blue (pH 7.0 ± 0.2) when agitated at 150 rpm for 120 min. Isothermal behavior were evaluated using non-linear isotherm models like Temkin, Langmuir and Freundlich models while the rate-limiting steps were found using kinetic models. Temkin isotherm and pseudo-first order model explained the removal mechanism among the models evaluated, which infers that the biosorption followed physisorption with the maximum adsorption capacity of 41.35 mg/g. Thermodynamic behavior of methylene blue removal by C. equisetifolia pines powder described the feasibility of biosorption as well as the type of heat involved. Equilibrium sorption capacities, rate constants and correlation coefficients explains that MB dye removal by C. equisetifolia pines is presumably physisorption, spontaneous and endothermic in nature.
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Affiliation(s)
- Helly Chandarana
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, 364 002, Gujarat, India
| | - Ponnusamy Senthil Kumar
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai, 603 110, Tamil Nadu, India
| | - Muthulingam Seenuvasan
- Department of Chemical Engineering, Hindusthan College of Engineering and Technology, Coimbatore, 641 032, Tamil Nadu, India
| | - Madhava Anil Kumar
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, 364 002, Gujarat, India; Academy of Scientific and Innovative Research, Ghaziabad, 201002, Uttar Pradesh, India.
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12
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Wang YF, Gu JD, Dick RP, Han W, Yang HX, Liao HQ, Zhou Y, Meng H. Distribution of ammonia-oxidizing archaea and bacteria along an engineered coastal ecosystem in subtropical China. Ecotoxicology 2021; 30:1769-1779. [PMID: 33432457 DOI: 10.1007/s10646-020-02327-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/25/2020] [Indexed: 06/12/2023]
Abstract
Ammonia-oxidizing archaea (AOA) and bacteria (AOB) are the crucial players in nitrogen cycle. Both AOA and AOB were examined along a gradient of human activity in a coastal ecosystem from intertidal zone, grassland, and Casuarina equisetifolia forest to farmland. Results showed that the farmland soils had noticeably higher nitrate-N, available P than soils in the other three sites. Generally, AOA and AOB community structures varied across sites. The farmland mainly had Nitrosotalea-like AOA, intertidal zone was dominated by Nitrosopumilus AOA, while grassland and C. equisetifolia forest primarily harbored Nitrososphaera-like AOA. The farmland and C. equisetifolia forest owned Nitrosospira-like AOB, intertidal zone possessed Nitrosomonas-like AOB, and no AOB was detected in the grassland. AOA abundance was significantly greater than AOB in this coastal ecosystem (p < 0.05, n = 8). AOB diversity and abundance in the farmland were significantly higher than those in the other three sites (p < 0.05, n = 2). The biodiversity and abundance of AOA were not significantly correlated with any soil property (p < 0.05, n = 8). However, the diversity of AOB was significantly correlated with pH, available P and total P (p < 0.05, n = 6). The abundance of AOB was significantly correlated with pH, nitrite, available N, available P and total P (p < 0.05, n = 6). This study suggested that the community structures of AOA and AOB vary in the different parts in the bio-engineered coastal ecosystem and agricultural activity appears to influence these nitrifiers.
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Affiliation(s)
- Yong-Feng Wang
- Institute of Environment and Ecology, Institute of Environmental Health and Ecological Security, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, PR China.
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, 233 Guangshan 1st Road, Guangzhou, PR China.
| | - Ji-Dong Gu
- Environmental Engineering, Guangdong Technion Israel Institute of Technology, 241 Daxue Road, Shantou, 515063, PR China
| | - Richard P Dick
- School of Environment and Natural Resources, The Ohio State University, 2021 Coffey Road, Columbus, OH, 43210-1085, USA
| | - Wei Han
- Agro-Technical Station of Shandong Province, Jinan, PR China
| | - Hui-Xiao Yang
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, 233 Guangshan 1st Road, Guangzhou, PR China
| | - Huan-Qin Liao
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, 233 Guangshan 1st Road, Guangzhou, PR China
| | - Yi Zhou
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, 233 Guangshan 1st Road, Guangzhou, PR China.
| | - Han Meng
- School of Environment, Nanjing Normal University, Nanjing, 210023, PR China
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Wang Y, Zhang Y, Fan C, Wei Y, Meng J, Li Z, Zhong C. Genome-wide analysis of MYB transcription factors and their responses to salt stress in Casuarina equisetifolia. BMC Plant Biol 2021; 21:328. [PMID: 34238224 PMCID: PMC8265015 DOI: 10.1186/s12870-021-03083-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 06/01/2021] [Indexed: 05/25/2023]
Abstract
BACKGROUND MYB transcription factors are a kind of DNA binding protein that can specifically interact with the promoter region. Members of MYB TFs are widely involved in plant growth and development, secondary metabolism, stress response, and hormone signal transduction. However, there is no report of comprehensive bioinformatics analysis on the MYB family of Casuarina equisetifolia. RESULTS In this study, bioinformatics methods were used to screen out 182 MYB transcription factors from the Casuarina equisetifolia genome database, including 69 1R-MYB, 107 R2R3-MYB, 4 R1R2R3-MYB, and 2 4R-MYB. The C. equisetifolia R2R3-MYB genes were divided into 29 groups based on the phylogenetic topology and the classification of the MYB superfamily in Arabidopsis thaliana, while the remaining MYB genes (1R-MYB, R1R2R3-MYB, and 4R-MYB) was divided into 19 groups. Moreover, the conserved motif and gene structure analysis shown that the members of the CeqMYBs were divided into the same subgroups with mostly similar gene structures. In addition, many conserved amino acids in the R2 and R3 domains of CeqMYBs by WebLogo analysis, especially tryptophan residues (W), with 3 conserved W in R2 repeat and 2 conserved W in R3 repeat. Combining promoter and GO annotation analysis, speculated on the various biological functions of CeqMYBs, thus 32 MYB genes were selected to further explore its response to salt stress by using qPCR analysis technique. Most CeqMYB genes were differentially regulated following multiple salt treatments. CONCLUSIONS Seven genes (CeqMYB164, CeqMYB4, CeqMYB53, CeqMYB32, CeqMYB114, CeqMYB71 and CeqMYB177) were assigned to the "response to salt stress" by GO annotation. Among them, the expression level of CeqMYB4 was up-regulated under various salt treatments, indicating CeqMYB4 might participated in the response to salt stress. Our results provide important information for the biological function of C. equisetifolia, as well as offer candidate genes for further study of salt stress mechanism.
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Affiliation(s)
- Yujiao Wang
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, 510520, China
| | - Yong Zhang
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, 510520, China.
| | - Chunjie Fan
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, 510520, China
| | - Yongcheng Wei
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, 510520, China
| | - Jingxiang Meng
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, 510520, China
| | - Zhen Li
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, 510520, China
| | - Chonglu Zhong
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, 510520, China
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14
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Jin Y, Xu Y, Huang Z, Zhou Z, Wei X. Metabolite pattern in root nodules of the actinorhizal plant Casuarina equisetifolia. Phytochemistry 2021; 186:112724. [PMID: 33721795 DOI: 10.1016/j.phytochem.2021.112724] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/25/2021] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
Casuarina equisetifolia L. (Casuarinaceae), an actinorhizal plant, exhibits mutualistic symbiosis with Frankia and promotes nitrogen fixation in root nodules. While the exchange of metabolites between host plant and microsymbiont is well understood in legume symbioses, the situation in the symbiosis between nitrogen-fixing Frankia and actinorhizal plants is less clear. In this study, a metabolomic approach was applied to root nodules of mature C. equisetifolia trees, leading to the identification of an undescribed taraxerane-type triterpenoid ester, 3-O-dihydrocoumaroyl β-taraxerol, along with twelve known compounds. An abundant component was tyramine with a content of 2.76 ± 0.315 mg/g FW in mature nodules. Tyramine specifically and abundantly accumulated in mature nitrogen-fixing nodules compared to senescent nodules, stems, leaves, and seeds. In addition, the potential function of tyramine was preliminarily examined and discussed.
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Affiliation(s)
- Yu Jin
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China; University of Chinese Academy of Sciences, Beijing, China
| | - Yingting Xu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China; University of Chinese Academy of Sciences, Beijing, China
| | - Zhengwan Huang
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China; University of Chinese Academy of Sciences, Beijing, China
| | - Zhongyu Zhou
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China; University of Chinese Academy of Sciences, Beijing, China; South China Branch of Innovation Academy for Drug Discovery and Development, Chinese Academy of Sciences, Guangzhou, 510650, China.
| | - Xiaoyi Wei
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China; University of Chinese Academy of Sciences, Beijing, China; South China Branch of Innovation Academy for Drug Discovery and Development, Chinese Academy of Sciences, Guangzhou, 510650, China
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15
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Zhang YQ, Huang R, Zuo LZ, Chen P, Li L. [Diversity of bacteria and allelopathic potential of their metabolites in differently aged Casuarina equisetifolia litter]. Ying Yong Sheng Tai Xue Bao 2020; 31:2185-2194. [PMID: 32715680 DOI: 10.13287/j.1001-9332.202007.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Litter plays an important role in ecosystems. To compare the diversity and community structure of microorganisms inside and outside litter, Casuarina equisetifolia were selected from three forests in Guilin coastal area of Haikou City, Hainan Province. Illumina Miseq high-throughput sequencing was used to analyze the diversity and composition of epiphytic and endophytic bacteria of litter. The results showed that the diversity of epiphytic bacteria was higher than that of endophytic bacteria. Moreover, the diversity and richness of bacteria inside and outside C. equisetifolia litter in the intermediate-aged forest were the highest, followed by young forest and mature forest. Proteobacteria and Actinobacteria were the most abundant at the phylum level, accounting for about 80% of the total. At the genus level, Curtobacterium, Jatrophihabitans, Mycobacterium, Actinomycetospora, Mucilaginibacter and Pseudomonas showed significant variation among different forest ages. PCoA results showed that the endophytic bacteria of litter were greatly affected by forest age, while the epiphytic bacteria were greatly affected by environmental factors. The fermentation broth of Bacillus amyloliquefaciens had the strongest allelopathic potential to C. equisetifolia seeds and 2,2'-methylenebis (6-tert-butyl-4-methyl-phenol) was found in it, indicating that B. amyloliquefaciens was involved in the synthesis of allelochemicals. The diversity of litter microbial community affected the allelopathy of C. equisetifolia, which laid a foundation for studying the role of microorganisms in the degradation process of C. equisetifolia litter.
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Affiliation(s)
- Ya-Qian Zhang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Sciences, Hainan Normal University, Haikou 571158, China
| | - Rui Huang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Sciences, Hainan Normal University, Haikou 571158, China
| | - Lin-Zhi Zuo
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Sciences, Hainan Normal University, Haikou 571158, China
| | - Pan Chen
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Sciences, Hainan Normal University, Haikou 571158, China
| | - Lei Li
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Sciences, Hainan Normal University, Haikou 571158, China
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Huang R, Chen P, Wang X, Li H, Zuo L, Zhang Y, Li L. Structural variability and niche differentiation of the rhizosphere and endosphere fungal microbiome of Casuarina equisetifolia at different ages. Braz J Microbiol 2020; 51:1873-1884. [PMID: 32661898 DOI: 10.1007/s42770-020-00337-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 07/08/2020] [Indexed: 10/23/2022] Open
Abstract
BACKGROUND Casuarina equisetifolia is one of the most important artificially planted protective forests along the coast in southern China for windbreaks, soil erosion, and sand dune stabilization. Self-renewing of C. equisetifolia is very limited, which might be caused by low soil nutrient levels and reduced microbial activity. METHODS Use of high-throughput sequencing of the 18S rDNA to investigate the microbial communities from the rhizosphere and root endosphere of C. equisetifolia in young-aged, intermediate-aged, and mature-aged forests. RESULTS Our results indicate that the diversity of rhizosphere fungal microbiomes in field-grown C. equisetifolia is much lower than that of the endosphere microbiomes. Bioinformatic analysis showed that rhizocompartments produce the strongest differentiation of rhizosphere and endosphere communities. Notably, the distribution of rhizosphere fungi communities was significantly influenced by the environmental factors, not by forest ages. CONCLUSIONS The presented study suggests that the rhizocompartments and environmental factors, rather than forest ages, determine the diversities of fungal community.
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Affiliation(s)
- Rui Huang
- College of Life Sciences, Ministry of Education Key Laboratory for Ecology of Tropical Islands, Hainan Normal University, Haikou, 571158, Hainan, China
| | - Pan Chen
- College of Life Sciences, Ministry of Education Key Laboratory for Ecology of Tropical Islands, Hainan Normal University, Haikou, 571158, Hainan, China
| | - Xuan Wang
- College of Life Sciences, Ministry of Education Key Laboratory for Ecology of Tropical Islands, Hainan Normal University, Haikou, 571158, Hainan, China
| | - Huimin Li
- College of Life Sciences, Ministry of Education Key Laboratory for Ecology of Tropical Islands, Hainan Normal University, Haikou, 571158, Hainan, China
| | - Linzhi Zuo
- College of Life Sciences, Ministry of Education Key Laboratory for Ecology of Tropical Islands, Hainan Normal University, Haikou, 571158, Hainan, China
| | - Yaqian Zhang
- College of Life Sciences, Ministry of Education Key Laboratory for Ecology of Tropical Islands, Hainan Normal University, Haikou, 571158, Hainan, China
| | - Lei Li
- College of Life Sciences, Ministry of Education Key Laboratory for Ecology of Tropical Islands, Hainan Normal University, Haikou, 571158, Hainan, China.
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Zhou L, Li J, Pokhrel GR, Chen J, Zhao Y, Bai Y, Zhang C, Lin W, Wu Z, Wu C. nifH Gene Sequencing Reveals the Effects of Successive Monoculture on the Soil Diazotrophic Microbial Community in Casuarina equisetifolia Plantations. Front Plant Sci 2020; 11:578812. [PMID: 33569067 PMCID: PMC7869410 DOI: 10.3389/fpls.2020.578812] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 12/21/2020] [Indexed: 05/03/2023]
Abstract
The growth and productivity of Casuarina equisetifolia is negatively impacted by planting sickness under long-term monoculture regimes. In this study, Illumina MiSeq sequencing targeting nifH genes was used to assess variations in the rhizospheric soil diazotrophic community under long-term monoculture rotations. Principal component analysis and unweighted pair-group method with arithmetic means (UPGMA) clustering demonstrated distinct differences in diazotrophic community structure between uncultivated soil (CK), the first rotation plantation (FCP), the second rotation plantation (SCP), and the third rotation plantation (TCP). Taxonomic analysis showed that the phyla Proteobacteria increased while Verrucomicrobia decreased under the consecutive monoculture (SCP and TCP). The relative abundance of Paraburkholderia, Rhodopseudomonas, Bradyrhizobium, Geobacter, Pseudodesulfovibrio, and Frankia increased significantly while Burkholderia, Rubrivivax, and Chlorobaculum declined significantly at the genus level under consecutive monoculture (SCP and TCP). Redundancy analysis (RDA) showed that Burkholderia, Rubrivivax, and Chlorobaculum were positively correlated with total nitrogen and available nitrogen. In conclusion, continuous C. equisetifolia monoculture could change the structure of diazotrophic microbes in the rhizosphere, resulting in the imbalance of the diazotrophic bacteria population, which might be a crucial factor related to replanting disease in this cultivated tree species.
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Affiliation(s)
- Liuting Zhou
- Fujian Agriculture and Forestry University, Fuzhou, China
| | - Jianjuan Li
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Ganga Raj Pokhrel
- Department of Chemistry, Birendra Multiple Campus, Tribhuvan University, Chitwan, Nepal
| | - Jun Chen
- Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yanlin Zhao
- Fujian Agriculture and Forestry University, Fuzhou, China
| | - Ying Bai
- Fujian Agriculture and Forestry University, Fuzhou, China
| | - Chen Zhang
- Fujian Agriculture and Forestry University, Fuzhou, China
| | - Wenxiong Lin
- Fujian Agriculture and Forestry University, Fuzhou, China
| | - Zeyan Wu
- Fujian Agriculture and Forestry University, Fuzhou, China
- Key Laboratory of Crop Ecology and Molecular Physiology, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
- *Correspondence: Zeyan Wu,
| | - Chengzhen Wu
- College of Forestry, Fujian Agriculture and Forestry University, Fuzhou, China
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Ngom M, Gray K, Diagne N, Oshone R, Fardoux J, Gherbi H, Hocher V, Svistoonoff S, Laplaze L, Tisa LS, Sy MO, Champion A. Symbiotic Performance of Diverse Frankia Strains on Salt-Stressed Casuarina glauca and Casuarina equisetifolia Plants. Front Plant Sci 2016; 7:1331. [PMID: 27630656 PMCID: PMC5006599 DOI: 10.3389/fpls.2016.01331] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Accepted: 08/18/2016] [Indexed: 05/29/2023]
Abstract
Symbiotic nitrogen-fixing associations between Casuarina trees and the actinobacteria Frankia are widely used in agroforestry in particular for salinized land reclamation. The aim of this study was to analyze the effects of salinity on the establishment of the actinorhizal symbiosis between C. glauca and two contrasting Frankia strains (salt sensitive; CcI3 vs. salt tolerant; CeD) and the role of these isolates in the salt tolerance of C. glauca and C. equisetifolia plants. We show that the number of root nodules decreased with increasing salinity levels in both plants inoculated with CcI3 and CeD. Nodule formation did not occur in seedlings inoculated with CcI3 and CeD, at NaCl concentrations above 100 and 200 mM, respectively. Salinity also affected the early deformation of plant root hairs and reduced their number and size. In addition, expression of symbiotic marker Cg12 gene, which codes for a subtilase, was reduced at 50 mM NaCl. These data suggest that the reduction of nodulation in C. glauca under salt stress is in part due to inhibition of early mechanisms of infection. We also show that prior inoculation of C. glauca and C. equisetifolia with Frankia strains CcI3 and CeD significantly improved plant height, dry biomass, chlorophyll and proline contents at all levels of salinity tested, depending on the Casuarina-Frankia association. There was no correlation between in vitro salt tolerance of Frankia strains and efficiency in planta under salt-stressed conditions. Our results strongly indicate that increased N nutrition, photosynthesis potential and proline accumulation are important factors responsible for salt tolerance of nodulated C. glauca and C. equisetifolia.
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Affiliation(s)
- Mariama Ngom
- Laboratoire Mixte International Adaptation des Plantes et microorganismes associés aux Stress Environnementaux, Centre de Recherche de Bel-AirDakar, Sénégal
- Laboratoire Campus de Biotechnologies Végétales, Département de Biologie Végétale, Faculté des Sciences et Techniques, Université Cheikh Anta DiopDakar, Sénégal
- Laboratoire Commun de Microbiologie Institut de Recherche pour le Développement/Institut Sénégalais de Recherches Agricoles/Université Cheikh Anta Diop, Centre de Recherche de Bel-AirDakar, Sénégal
| | - Krystelle Gray
- Laboratoire Mixte International Adaptation des Plantes et microorganismes associés aux Stress Environnementaux, Centre de Recherche de Bel-AirDakar, Sénégal
- Laboratoire Commun de Microbiologie Institut de Recherche pour le Développement/Institut Sénégalais de Recherches Agricoles/Université Cheikh Anta Diop, Centre de Recherche de Bel-AirDakar, Sénégal
- UMR DIADE, Institut de Recherche pour le DéveloppementMontpellier, France
| | - Nathalie Diagne
- Laboratoire Mixte International Adaptation des Plantes et microorganismes associés aux Stress Environnementaux, Centre de Recherche de Bel-AirDakar, Sénégal
- Centre National de Recherches Agronomiques, Institut Sénégalais de Recherches AgricolesBambey, Sénégal
| | - Rediet Oshone
- Department of Molecular, Cellular, and Biomedical Sciences, University of New HampshireDurham, NH, USA
| | - Joel Fardoux
- Laboratoire des Symbioses Tropicales et Méditerranéennes, Institut de Recherche pour le Développement/INRA/CIRAD/Université Montpellier/Sup agroMontpellier, France
| | - Hassen Gherbi
- Laboratoire des Symbioses Tropicales et Méditerranéennes, Institut de Recherche pour le Développement/INRA/CIRAD/Université Montpellier/Sup agroMontpellier, France
| | - Valérie Hocher
- Laboratoire des Symbioses Tropicales et Méditerranéennes, Institut de Recherche pour le Développement/INRA/CIRAD/Université Montpellier/Sup agroMontpellier, France
| | - Sergio Svistoonoff
- Laboratoire Mixte International Adaptation des Plantes et microorganismes associés aux Stress Environnementaux, Centre de Recherche de Bel-AirDakar, Sénégal
- Laboratoire Commun de Microbiologie Institut de Recherche pour le Développement/Institut Sénégalais de Recherches Agricoles/Université Cheikh Anta Diop, Centre de Recherche de Bel-AirDakar, Sénégal
- Laboratoire des Symbioses Tropicales et Méditerranéennes, Institut de Recherche pour le Développement/INRA/CIRAD/Université Montpellier/Sup agroMontpellier, France
| | - Laurent Laplaze
- Laboratoire Mixte International Adaptation des Plantes et microorganismes associés aux Stress Environnementaux, Centre de Recherche de Bel-AirDakar, Sénégal
- Laboratoire Commun de Microbiologie Institut de Recherche pour le Développement/Institut Sénégalais de Recherches Agricoles/Université Cheikh Anta Diop, Centre de Recherche de Bel-AirDakar, Sénégal
- UMR DIADE, Institut de Recherche pour le DéveloppementMontpellier, France
| | - Louis S. Tisa
- Department of Molecular, Cellular, and Biomedical Sciences, University of New HampshireDurham, NH, USA
| | - Mame O. Sy
- Laboratoire Mixte International Adaptation des Plantes et microorganismes associés aux Stress Environnementaux, Centre de Recherche de Bel-AirDakar, Sénégal
- Laboratoire Campus de Biotechnologies Végétales, Département de Biologie Végétale, Faculté des Sciences et Techniques, Université Cheikh Anta DiopDakar, Sénégal
| | - Antony Champion
- Laboratoire Mixte International Adaptation des Plantes et microorganismes associés aux Stress Environnementaux, Centre de Recherche de Bel-AirDakar, Sénégal
- UMR DIADE, Institut de Recherche pour le DéveloppementMontpellier, France
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Hata K, Kawakami K, Kachi N. Increases in soil water content after the mortality of non-native trees in oceanic island forest ecosystems are due to reduced water loss during dry periods. Sci Total Environ 2016; 545-546:372-380. [PMID: 26748001 DOI: 10.1016/j.scitotenv.2015.12.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 12/02/2015] [Accepted: 12/02/2015] [Indexed: 06/05/2023]
Abstract
The control of dominant, non-native trees can alter the water balance of soils in forest ecosystems via hydrological processes, which results in changes in soil water environments. To test this idea, we evaluated the effects of the mortality of an invasive tree, Casuarina equisetifolia Forst., on the water content of surface soils on the Ogasawara Islands, subtropical islands in the northwestern Pacific Ocean, using a manipulative herbicide experiment. Temporal changes in volumetric water content of surface soils at 6 cm depth at sites where all trees of C. equisetifolia were killed by herbicide were compared with those of adjacent control sites before and after their mortality with consideration of the amount of precipitation. In addition, the rate of decrease in the soil water content during dry periods and the rate of increase in the soil water content during rainfall periods were compared between herbicide and control sites. Soil water content at sites treated with herbicide was significantly higher after treatment than soil water content at control sites during the same period. Differences between initial and minimum values of soil water content at the herbicide sites during the drying events were significantly lower than the corresponding differences in the control quadrats. During rainfall periods, both initial and maximum values of soil water contents in the herbicided quadrats were higher, and differences between the maximum and initial values did not differ between the herbicided and control quadrats. Our results indicated that the mortality of non-native trees from forest ecosystems increased water content of surface soils, due primarily to a slower rate of decrease in soil water content during dry periods.
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Affiliation(s)
- Kenji Hata
- Department of Biological Sciences, Graduate School of Science and Engineering, Tokyo Metropolitan University, Tokyo 192-0397, Japan.
| | - Kazuto Kawakami
- Forestry and Forest Products Research Institute, Tsukuba, Japan
| | - Naoki Kachi
- Department of Biological Sciences, Graduate School of Science and Engineering, Tokyo Metropolitan University, Tokyo 192-0397, Japan
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Wu W, Huang Z, Li Z, Zhang S, Liu X, Gu D. De novo transcriptome sequencing of Cryptotermes domesticus and comparative analysis of gene expression in response to different wood species. Gene 2015; 575:655-66. [PMID: 26410413 DOI: 10.1016/j.gene.2015.09.055] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 09/18/2015] [Indexed: 11/17/2022]
Abstract
The drywood termite Cryptotermes domesticus is an important worldwide pest with limited genomic resources that causes substantial damage to dry timber and structural lumber. Here, we performed transcriptome sequencing for Cr. domesticus pseudergate using Illumina paired-end sequencing technology. A total of 108,745,470 clean reads were collected and assembled into 302,979 contigs with an average length of 648bp and an N50 length of 893bp. A total of 185,248 unigenes and 100,680 proteins were identified among the assembled contigs. Of these, there were 152,317 (50.27%) contigs with significant similarity to publicly available databases. To understand how the termites respond to phylogenetically diverse wood species, variations in gene expression were examined among pseudergates feeding on three wood species from different plant families, Casuarina equisetifolia (CE), Koompassia excelsa (KE) and Myristica sp. (MS). A total of 417 (118 up-regulated/299 down-regulated), 599 (148 up-regulated/451 down-regulated) and 505 (223 up-regulated/282 down-regulated) differentially expressed genes were detected in KE vs. CE, KE vs. MS and CE vs. MS, respectively. Digital gene expression analysis indicated that different wood species played an important role in the expression of termite genes, such as genes involved in carbohydrate metabolism, and proteins with catalytic activity and hydrolase activity. Additionally, the genes encoding cellulase were identified and analyzed. This study provides the first primary transcriptome of Cr. domesticus and lays a foundation for future functional genomics studies in the feeding responses.
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Affiliation(s)
- Wenjing Wu
- Guangdong Entomological Institute, Xingangxi Road 105, Guangzhou, Guangdong 510260, China; Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Xingangxi Road 105, Guangzhou, Guangdong 510260, China; Guangdong Key Laboratory of Integrated Pest Management in Agriculture, Xingangxi Road 105, Guangzhou, Guangdong 510260, China
| | - Zhenyou Huang
- Guangdong Entomological Institute, Xingangxi Road 105, Guangzhou, Guangdong 510260, China
| | - Zhiqiang Li
- Guangdong Entomological Institute, Xingangxi Road 105, Guangzhou, Guangdong 510260, China; Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Xingangxi Road 105, Guangzhou, Guangdong 510260, China; Guangdong Key Laboratory of Integrated Pest Management in Agriculture, Xingangxi Road 105, Guangzhou, Guangdong 510260, China.
| | - Shijun Zhang
- Guangdong Entomological Institute, Xingangxi Road 105, Guangzhou, Guangdong 510260, China; Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Xingangxi Road 105, Guangzhou, Guangdong 510260, China; Guangdong Key Laboratory of Integrated Pest Management in Agriculture, Xingangxi Road 105, Guangzhou, Guangdong 510260, China
| | - Xiaolin Liu
- Guangdong Entomological Institute, Xingangxi Road 105, Guangzhou, Guangdong 510260, China; Institute of Entomology and State Key Laboratory of Biocontrol, Sun Yat-sen University, Xingangxi Road 135, Guangzhou, Guangdong 510275, China
| | - Daifei Gu
- Guangdong Entomological Institute, Xingangxi Road 105, Guangzhou, Guangdong 510260, China; College of Forestry, Northeast Forestry University, Hexing Road 26, Harbin, Heilongjiang 150040, China
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Velasco-Medina AA, Velázquez-Sámano G. [Sensitization to Casuarina equisetifolia and Pinus spp pollen in patients with allergic rhinitis and asthma in Mexico City]. Rev Alerg Mex 2014; 61:9-13. [PMID: 24912997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
Abstract
BACKGROUND Pollinosis studies at Mexico City have found a considerable amount of Casuarina equisetifolia and Pinus spp pollen, its sensitization frequency is unknown. In Mexico, some allergens are not considered related to asthma or allergic rhinitis, even though reports in other countries have been demonstrated their relevance as aeroallergens. OBJECTIVE To estimate the frequency of sensitization to Casuarina equisetifolia and Pinus spp pollen. PATIENTS AND METHOD A transversal, descriptive trial was done at Hospital General de Mexico. Previous informed consent 142 patients with allergic rhinitis and asthma, 3 to 55 years old, were included to the study. A complete clinical evaluation, laboratory tests and skin prick tests were performed. RESULTS We included 142 patients, 44 children (64% males) and 98 adults (73% females). We found that 8 (18.18%) children and 35 (35.7%) adults had a positive skin prick test to Casuarina equisetifolia. None of the patients included in the study had a positive skin prick test to Pinus spp. CONCLUSIONS Sensitization to Casuarina equisetifolia is as important as other pollens found in Mexico City. These results suggest that it should be included when skin prick tests are performed. Pinus spp pollen is considered an aeroallergen in European countries but we did not corroborate sensitization in our population.
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Affiliation(s)
- Andrea Aida Velasco-Medina
- Servicio de Alergia e Inmunología Clínica, Hospital General de México. Dr. Balmis 148, 06720 México, DF.
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El-Tantawy WH, Mohamed SAH, Abd Al Haleem EN. Evaluation of biochemical effects of Casuarina equisetifolia extract on gentamicin-induced nephrotoxicity and oxidative stress in rats. Phytochemical analysis. J Clin Biochem Nutr 2013; 53:158-65. [PMID: 24249970 PMCID: PMC3818266 DOI: 10.3164/jcbn.13-19] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Accepted: 03/27/2013] [Indexed: 11/22/2022] Open
Abstract
Nephrotoxicity is defined as renal dysfunction that arises as result of exposure to external agents such as drugs and environmental chemicals. The present work was undertaken to carry out the phytochemical study and nephroprotective activity of methanolic extract of Casuarina equisetifolia leaves in gentamicin-induced nephrotoxicity in Wistar rats. Flavonoids and phenolic acids were identified and quantified using high performance liquid chromatography. Subcutaneous injection of rats with gentamicin (80 mg/kg body weight/day) for six consecutive days induced marked acute renal toxicity, manifested by a significant increase in serum urea, creatinine and uric acid levels, along with a significant depletion of serum potassium level, compared to normal controls. Also oxidative stress was noticed in renal tissue as evidenced by a significant decrease in glutathione level, superoxide dismutase, glutathione-S-transferase activities, also a significant increase in malondialdehyde and nitric oxide levels when compared to control group. Administration of plant extract at a dose of 300 mg/kg once daily for 4 weeks restored normal renal functions and attenuated oxidative stress. In conclusion, Casuarina equisetifolia leaves extract ameliorates gentamicin-induced nephrotoxicity and oxidative damage by scavenging oxygen free radicals, decreasing lipid peroxidation and improving intracellular antioxidant defense, thus extract may be used as nephroprotective agent.
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