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Tian S, Xu Y, Zhong Y, Qiao Y, Wang D, Wu L, Yang X, Yang M, Wu Z. Exploring the Organic Acid Secretion Pathway and Potassium Solubilization Ability of Pantoea vagans ZHS-1 for Enhanced Rice Growth. PLANTS (BASEL, SWITZERLAND) 2024; 13:1945. [PMID: 39065472 PMCID: PMC11281029 DOI: 10.3390/plants13141945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 07/12/2024] [Accepted: 07/13/2024] [Indexed: 07/28/2024]
Abstract
Soil potassium deficiency is a common issue limiting agricultural productivity. Potassium-solubilizing bacteria (KSB) show significant potential in mitigating soil potassium deficiency, improving soil quality, and enhancing plant growth. However, different KSB strains exhibit diverse solubilization mechanisms, environmental adaptability, and growth-promoting abilities. In this study, we isolated a multifunctional KSB strain ZHS-1, which also has phosphate-solubilizing and IAA-producing capabilities. 16S rDNA sequencing identified it as Pantoea vagans. Scanning electron microscopy (SEM) showed that strain ZHS-1 severely corroded the smooth, compact surface of potassium feldspar into a rough and loose state. The potassium solubilization reached 20.3 mg/L under conditions where maltose was the carbon source, sodium nitrate was the nitrogen source, and the pH was 7. Organic acid metabolism profiling revealed that strain ZHS-1 primarily utilized the EMP-TCA cycle, supplemented by pathways involving pantothenic acid, glyoxylic acid, and dicarboxylic acids, to produce large amounts of organic acids and energy. This solubilization was achieved through direct solubilization mechanisms. The strain also secreted IAA through a tryptophan-dependent metabolic pathway. When strain ZHS-1 was inoculated into the rhizosphere of rice, it demonstrated significant growth-promoting effects. The rice plants exhibited improved growth and root development, with increased accumulation of potassium and phosphorus. The levels of available phosphorus and potassium in the rhizosphere soil also increased significantly. Additionally, we observed a decrease in the relative abundance of Actinobacteria and Proteobacteria in the rice rhizosphere soil, while the relative abundance of genera associated with acid production and potassium solubilization, such as Gemmatimonadota, Acidobacteria, and Chloroflexi, as well as Cyanobacteria, which are beneficial to plant growth, increased. These findings contribute to a deeper understanding of the potassium solubilization mechanisms of strain ZHS-1 and highlight its potential as a plant growth-promoting rhizobacteria.
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Affiliation(s)
- Shiqi Tian
- College of Life Sciences, Jilin Agricultural University, Changchun 130118, China; (S.T.); (Y.X.); (Y.Z.); (Y.Q.); (L.W.); (X.Y.)
| | - Yufeng Xu
- College of Life Sciences, Jilin Agricultural University, Changchun 130118, China; (S.T.); (Y.X.); (Y.Z.); (Y.Q.); (L.W.); (X.Y.)
| | - Yanglin Zhong
- College of Life Sciences, Jilin Agricultural University, Changchun 130118, China; (S.T.); (Y.X.); (Y.Z.); (Y.Q.); (L.W.); (X.Y.)
| | - Yaru Qiao
- College of Life Sciences, Jilin Agricultural University, Changchun 130118, China; (S.T.); (Y.X.); (Y.Z.); (Y.Q.); (L.W.); (X.Y.)
| | - Dongchao Wang
- Faculty of Agronomy, Jilin Agricultural University, Changchun 130118, China;
| | - Lei Wu
- College of Life Sciences, Jilin Agricultural University, Changchun 130118, China; (S.T.); (Y.X.); (Y.Z.); (Y.Q.); (L.W.); (X.Y.)
| | - Xue Yang
- College of Life Sciences, Jilin Agricultural University, Changchun 130118, China; (S.T.); (Y.X.); (Y.Z.); (Y.Q.); (L.W.); (X.Y.)
| | - Meiying Yang
- College of Life Sciences, Jilin Agricultural University, Changchun 130118, China; (S.T.); (Y.X.); (Y.Z.); (Y.Q.); (L.W.); (X.Y.)
| | - Zhihai Wu
- Faculty of Agronomy, Jilin Agricultural University, Changchun 130118, China;
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Zhou Y, Li X, Wang D, Yu Z, Liu Y, Hu L, Bian Z. Identification of Transcription Factors of Santalene Synthase Gene Promoters and SaSSY Cis-Elements through Yeast One-Hybrid Screening in Santalum album L. PLANTS (BASEL, SWITZERLAND) 2024; 13:1882. [PMID: 38999721 PMCID: PMC11244121 DOI: 10.3390/plants13131882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 06/21/2024] [Accepted: 06/28/2024] [Indexed: 07/14/2024]
Abstract
The main components of sandalwood heartwood essential oil are terpenoids, approximately 80% of which are α-santalol and β-santalol. In the synthesis of the main secondary metabolites of sandalwood heartwood, the key gene, santalene synthase (SaSSY), can produce α-santalene and β-santalene by catalyzed (E, E)-FPP. Furthermore, santalene is catalyzed by the cytochrome monooxygenase SaCYP736A167 to form sandalwood essential oil, which then produces a fragrance. However, the upstream regulatory mechanism of the key gene santalene synthase remains unclear. In this study, SaSSY (Sal3G10690) promoter transcription factors and SaSSY cis-elements were screened. The results showed that the titer of the sandalwood cDNA library was 1.75 × 107 CFU/mL, 80% of the inserted fragments identified by PCR were over 750 bp in length, and the positivity rate of the library was greater than 90%. The promoter region of the SaSSY gene was shown to have the structural basis for potential regulatory factor binding. After sequencing and bioinformatics analysis, we successfully obtained 51 positive clones and identified four potential SaSSY transcriptional regulators. Sal6G03620 was annotated as the transcription factor MYB36-like, and Sal8G07920 was annotated as the small heat shock protein HSP20 in sandalwood. Sal1G00910 was annotated as a hypothetical protein of sandalwood. Sal4G10880 was annotated as a homeobox-leucine zipper protein (ATHB-15) in sandalwood. In this study, a cDNA library of sandalwood was successfully constructed using a yeast one-hybrid technique, and the transcription factors that might interact with SaSSY gene promoters were screened. This study provides a foundation for exploring the molecular regulatory mechanism involved in the formation of sandalwood heartwood.
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Affiliation(s)
- Yunqing Zhou
- College of Biology and Food Engineering, Chongqing Three Gorges University, Chongqing 404100, China
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Xiang Li
- College of Biology and Food Engineering, Chongqing Three Gorges University, Chongqing 404100, China
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Dongli Wang
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China
| | - Zequn Yu
- Shanghai Gardening-Landscaping Construction Co., Ltd., Shanghai 200333, China
| | - Yunshan Liu
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China
| | - Lipan Hu
- College of Biology and Food Engineering, Chongqing Three Gorges University, Chongqing 404100, China
| | - Zhan Bian
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
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Kordrostami M, Sanjarian F, Shahbazi S, Ghasemi-Soloklui AA. Exploring low-dose gamma radiation effects on monoterpene biosynthesis in Thymus vulgaris: insights into plant defense mechanisms. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:32842-32862. [PMID: 38668946 DOI: 10.1007/s11356-024-33269-y] [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: 07/25/2023] [Accepted: 04/05/2024] [Indexed: 05/29/2024]
Abstract
Thymus vulgaris, commonly known as thyme, is a plant renowned for producing monoterpenes. This study aimed to understand the effects of low-dose gamma radiation, specifically in the range of 1-5 Gy, on various traits of Thymus vulgaris, providing context on its importance in agricultural and medicinal applications. The research explored morpho-physiological, biochemical, and gene-expression responses in thyme plants under no gamma- and gamma-ray exposure conditions. The study revealed complex relationships between gamma-ray doses and plant characteristics. In particular, shoot and root lengths initially increased with low doses (1-3 Gy) but decreased at higher doses (5 Gy), suggesting a dose-dependent threshold effect. Similarly, shoot and root fresh weights displayed an initial increase followed by a decline with increasing doses. Biochemical parameters showed dose-dependent responses, with low to moderate doses (1-3 Gy) stimulating enzyme activities and high doses (5 Gy) inhibiting them. Gene expression analysis was focused on the following specific genes: thymol synthase, γ-terpinene synthase, and carvacrol synthase. Low to moderate doses increased the expression of these genes, resulting in increased production of bioactive compounds. However, higher doses had diminished effects or suppressed gene expression. Metabolite analysis demonstrated dose-dependent responses, with moderate doses enhancing secondary metabolite production, while higher doses provided limited benefits. These findings underscore the implications of using gamma radiation to enhance secondary metabolite production in plants and its potential applications in agriculture, medicine, and environmental science. The study emphasizes the potential of gamma radiation as an external stressor to influence plant responses and highlights the importance of understanding such effects in various fields.
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Affiliation(s)
- Mojtaba Kordrostami
- Nuclear Agriculture Research School, Nuclear Science and Technology Research Institute (NSTRI), Karaj, Iran
| | - Forough Sanjarian
- Plant Bioproducts Department, Institute of Agricultural Biotechnology, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran.
| | - Samira Shahbazi
- Nuclear Agriculture Research School, Nuclear Science and Technology Research Institute (NSTRI), Karaj, Iran
| | - Ali Akbar Ghasemi-Soloklui
- Nuclear Agriculture Research School, Nuclear Science and Technology Research Institute (NSTRI), Karaj, Iran
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Bahri S, Mlika M, Nahdi A, Ben Ali R, Jameleddine S. Thymus Vulgaris Inhibit Lung Fibrosis Progression and Oxidative Stress Induced by Bleomycin in Wistar Rats. Nutr Cancer 2021; 74:1420-1430. [PMID: 34278915 DOI: 10.1080/01635581.2021.1952451] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a chronic, devastating and fatal disease characterized by aberrant fibroblasts proliferation, oxidative stress and collagen accumulation in the interstitial tissue. We aimed to evaluate in the present study the efficacy of Thymus vulagris extract (TVE) on an experimental model of pulmonary fibrosis induced by bleomycin (BLM). Wistar rats were given a single dose of BLM (4 mg/kg, intratracheal), while TVE (50, 100 and 200 mg/kg, intraperitoneal) was administered 3 days later and continued for 4 weeks. We reveled by HPLC analysis an important amount of phenolic bioactive compounds such as rosmarinic and vanillic acids. Our results showed a significant decrease of catalase and superoxide dismutase activities and an increase in lipid peroxidation compared to control group after BLM injection. Treatment with TVE (200 mg/kg) was able to normalize the level of these oxidative markers and to decrease collagen accumulation compared to BLM group. Moreover, this high dose of TVE have no renal or hepatic cytotoxic effects. This study allowed us to conclude that thyme extract has a strong antioxidant and antifibrotic activities due to its high content of polyphenols.
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Affiliation(s)
- Sana Bahri
- Laboratory of Physiology, Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia.,Laboratory of Physiopathology, Food and Biomolecules (LR-17-ES-03), Technology Center of Sidi Thabet, University of Manouba, Tunis, Tunisia
| | - Mona Mlika
- Laboratory of Anatomy and Pathology, Abderhaman Mami Hospital, Ariana, Tunisia
| | - Afef Nahdi
- Research Unit n° 17/ES/13, Faculty of Medicine, University of Tunis El Manar, Tunis, Tunisia
| | - Ridha Ben Ali
- Laboratory of Experimental Medicine, Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Saloua Jameleddine
- Laboratory of Physiology, Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia.,Laboratory of Physiopathology, Food and Biomolecules (LR-17-ES-03), Technology Center of Sidi Thabet, University of Manouba, Tunis, Tunisia
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Yang Z, Xie C, Huang Y, An W, Liu S, Huang S, Zheng X. Metabolism and transcriptome profiling provides insight into the genes and transcription factors involved in monoterpene biosynthesis of borneol chemotype of Cinnamomum camphora induced by mechanical damage. PeerJ 2021; 9:e11465. [PMID: 34249483 PMCID: PMC8255067 DOI: 10.7717/peerj.11465] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 04/26/2021] [Indexed: 12/31/2022] Open
Abstract
Background The borneol chemotype of Cinnamomum camphora (BCC), a monoterpene-rich woody plant species, is the sole source prescribed by the Chinese Pharmacopoeia for the production of natural D-borneol, a major monoterpene in BCC used for millennia as a topical analgesic in China. Nevertheless, the possible gene-regulatory roles of transcription factors (TFs) in BCC’s monoterpenoid biosynthesis remained unknown. Here, a joint analysis of the transcriptome and terpenoid metabolome of BCC induced by mechanical damage (MD) was used to comprehensively explore the interaction between TFs and terpene synthase (TPS) unigenes that might participate in monoterpene biosynthesis in BCC. Results Gas chromatography–mass spectrometry analysis detected 14 monoterpenes and seven sesquiterpenes. All but two monoterpenes underwent a significantly increased accumulation after the MD treatment. RNA sequencing data revealed that 10 TPS, 82 MYB, 70 AP2/ERF, 38 BHLH, 31 WRKY, and 29 bZIP unigenes responded to the MD treatment. A correlation analysis revealed that three monoterpene synthase genes (CcTPS1, CcTPS3, CcTPS4) highly correlated with multiple monoterpenes, namely D-borneol, camphor, and bornyl acetate, which could be responsible for monoterpenoid biosynthesis in BCC. Furthermore, five WRKY, 15 MYB, 10 ERF/AP2, five bZIP, and two BHLH genes had strong, positive correlations with CcTPS1 or CcTPS4, judging by their high coefficient values (R2 > 0.8). The bioinformatics results were verified by quantitative real-time PCR. Conclusion This study provides insight into the genes involved in the biosynthesis and regulation of monoterpene in BCC and thus provides a pool of candidate genes for future mechanistic analyses of how monoterpenes accumulate in BCC.
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Affiliation(s)
- Zerui Yang
- School of Pharmacy, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Chunzhu Xie
- School of Pharmacy, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Yuying Huang
- School of Pharmacy, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Wenli An
- School of Pharmacy, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Shanshan Liu
- School of Pharmacy, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Song Huang
- School of Pharmacy, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Xiasheng Zheng
- School of Pharmacy, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
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