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Qian S, Zhang Q, Li S, Shi R, He X, Zi S, Liu T. Arbuscular mycorrhiza and plant growth promoting endophytes facilitates accumulation of saponin under moderate drought stress. CHINESE HERBAL MEDICINES 2024; 16:214-226. [PMID: 38706830 PMCID: PMC11064634 DOI: 10.1016/j.chmed.2022.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 10/16/2022] [Accepted: 11/25/2022] [Indexed: 02/05/2023] Open
Abstract
Objective Paris polyphylla var. yunnanensis, one of the important medicinal plant resources in Yunnan, China, usually takes 6-8 years to be harvested. Therefore, it is urgent to find a method that can not only shorten its growth years, but also improve its quality. In this study, we examined the effects of a combination treatment of arbuscular mycorrhizal fungi (AMF) and plant growth-promoting endophytes (PGPE) and drought stress on the accumulation of saponins in it. Methods P. polyphylla var. yunnanensis was infected with a mixture of AMF and PGPE under drought stress. The content of saponins, as well as morphological, physiological, and biochemical indicators, were all measured. The UGTs gene related to saponin synthesis was obtained from transcriptome data by homologous comparison, which were used for RT-PCR and phylogenetic analysis. Results Regardless of water, AMF treatment could infect the roots of P. polyphylla var. yunnanensis, however double inoculation with AMF and PGPE (AMF + PGPE) would reduce the infection rate of AMF. Plant height, aboveground and underground fresh weight did not differ significantly between the single inoculation AMF and the double inoculation treatment under different water conditions, but the inoculation treatment significantly increased the plant height of P. polyphylla var. yunnanensis compared to the non-inoculation treatment. Single inoculation with AMF considerably increased the net photosynthetic rate, stomatal conductance, and transpiration rate of P. polyphylla var. yunnanensis leaves under various water conditions, but double inoculation with AMF + PGPE greatly increased the intercellular CO2 concentration and chlorophyll fluorescence parameter (Fv/Fm). Under diverse water treatments, single inoculation AMF had the highest proline content, whereas double inoculation AMF + PGPE may greatly improve the amount of abscisic acid (ABA) and indoleacetic acid (IAA) compared to normal water under moderate drought. Double inoculation AMF + PGPE treatment improved the proportion of N, P, and K in the rhizome of P. polyphylla var. yunnanensis under various water conditions. Under moderate drought stress, AMF + PGPE significantly enhanced the contents of P. polyphylla var. yunnanensis saponins I, II, VII, and total saponins as compared to normal water circumstances. Farnesyl diphosphate synthase (FPPS), Geranyl pyrophosphate synthase (GPPS), Cycloartenol synthase (CAS), and Squalene epoxidase (SE1) were the genes that were significantly up-regulated at the same time. The amount of saponins was favorably linked with the expression of CAS, GPPS, and SE1. Saponin VI content and glycosyl transferase (UGT) 010922 gene expression were found to be substantially associated, as was saponin II content and UGT010935 gene expression. Conclusion Under moderate drought, AMF + PGPE was more conducive to the increase of hormone content, nutrient absorption, and total saponin content in P. polyphylla var. yunnanensis, and AMF + PGPE could up regulate the expression of key genes and UGTs genes in one or more steroidal saponin synthesis pathways to varying degrees, thereby stimulating the synthesis and accumulation of steroidal saponins in the rhizome of P. polyphylla var. yunnanensis. The combination of AMF and PGPE inoculation, as well as adequate soil drought, reduced the buildup of saponins in P. polyphylla var. yunnanensis and increased its quality.
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Affiliation(s)
- Shubiao Qian
- Yunnan Agricultural University, Kunming 650201, China
- National & Local Joint Engineering Research Center on Gemplasm Utilization & Innovation of Chinese Medicinal Materials in Southwest China, Yunnan Agricultural University, Kunming 650201, China
| | - Qing Zhang
- Yunnan Agricultural University, Kunming 650201, China
- National & Local Joint Engineering Research Center on Gemplasm Utilization & Innovation of Chinese Medicinal Materials in Southwest China, Yunnan Agricultural University, Kunming 650201, China
| | - Sha Li
- Institute of Sericulture and Honeybee, Honghe 661101, China
| | - Rui Shi
- Southwest Forestry University, Kunming 650201, China
| | - Xiahong He
- Southwest Forestry University, Kunming 650201, China
| | - Shuhui Zi
- Yunnan Agricultural University, Kunming 650201, China
- National & Local Joint Engineering Research Center on Gemplasm Utilization & Innovation of Chinese Medicinal Materials in Southwest China, Yunnan Agricultural University, Kunming 650201, China
| | - Tao Liu
- Yunnan Agricultural University, Kunming 650201, China
- National & Local Joint Engineering Research Center on Gemplasm Utilization & Innovation of Chinese Medicinal Materials in Southwest China, Yunnan Agricultural University, Kunming 650201, China
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Fan X, Xie H, Huang X, Zhang S, Nie Y, Chen H, Xie X, Tang M. A module centered on the transcription factor Msn2 from arbuscular mycorrhizal fungus Rhizophagus irregularis regulates drought stress tolerance in the host plant. THE NEW PHYTOLOGIST 2023; 240:1497-1518. [PMID: 37370253 DOI: 10.1111/nph.19077] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 05/24/2023] [Indexed: 06/29/2023]
Abstract
Arbuscular mycorrhizal (AM) fungi can form mutualistic endosymbiosis with > 70% of land plants for obtaining fatty acids and sugars, in return, AM fungi promote plant nutrients and water acquisition to enhance plant fitness. However, how AM fungi orchestrate its own signaling components in response to drought stress remains elusive. Here, we identify a transcription factor containing C2H2 zinc finger domains, RiMsn2 from Rhizophagus irregularis. To characterize the RiMsn2, we combined heterologous expression, subcellular localization in yeasts, and biochemical and molecular studies with reverse genetics approaches during the in planta phase. The results indicate that RiMsn2 is highly conserved across AM fungal species and induced during the early stages of symbiosis. It is significantly upregulated in mycorrhizal roots under severe drought conditions. The nucleus-localized RiMsn2 regulates osmotic homeostasis and trehalose contents of yeasts. Importantly, gene silencing analyses indicate that RiMsn2 is essential for arbuscule formation and enhances plant tolerance to drought stress. Results from yeasts and biochemical experiments suggest that the RiHog1-RiMsn2-STREs module controls the drought stress-responsive genes in AM fungal symbiont. In conclusion, our findings reveal that a module centered on the transcriptional activator RiMsn2 from AM fungus regulates drought stress tolerance in host plant.
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Affiliation(s)
- Xiaoning Fan
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
| | - Hongyun Xie
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
| | - Xinru Huang
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
| | - Shuyuan Zhang
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
| | - Yuying Nie
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
| | - Hui Chen
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
| | - Xianan Xie
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
| | - Ming Tang
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Laboratory for Lingnan Modern Agriculture, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, 510642, China
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Rasouli F, Amini T, Skrovankova S, Asadi M, Hassanpouraghdam MB, Ercisli S, Buckova M, Mrazkova M, Mlcek J. Influence of drought stress and mycorrhizal ( Funneliformis mosseae) symbiosis on growth parameters, chlorophyll fluorescence, antioxidant activity, and essential oil composition of summer savory ( Satureja hortensis L.) plants. FRONTIERS IN PLANT SCIENCE 2023; 14:1151467. [PMID: 37342133 PMCID: PMC10278574 DOI: 10.3389/fpls.2023.1151467] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 05/12/2023] [Indexed: 06/22/2023]
Abstract
Introduction Drought stress unfavorably influences the growth and physiological traits of plants in the arid and semi-arid regions of the world. This study aimed to determine the effects of arbuscular mycorrhiza fungi (AMF; Funneliformis mosseae) inoculation on the physiological and biochemical responses of summer savory (Satureja hortensis L.) under different irrigation regimes. Methods The first factor was different irrigation regimes, including no drought stress (100% field capacity; FC), moderate drought stress (60% FC), and severe drought stress (30% FC); the second factor included the plants without AMF (AMF0) and with AMF inoculation (AMF1). Results The results showed that better values, higher plant height, shoot mass (fresh and dry weight), relative water content (RWC), membrane stability index (MSI), photosynthesis pigments, Fv, Fm, Fv/Fm, and total soluble proteins were obtained in the plants inoculated with AMF. The highest values were obtained for plants with no drought stress, then the plants subjected to AMF1 under 60% FC, and the lowest ones for plants under 30% FC without AMF inoculation. Thus, these properties are reduced under moderate and severe drought stress. At the same time, the utmost activity of superoxide dismutase (SOD), ascorbate peroxidase (APX), guaiacol peroxidase (GPX), and the highest malondialdehyde (MDA), H2O2, proline, and antioxidant activity (TAA) were achieved for 30% FC + AMF0. It was also found that AMF inoculation improved essential oil (EO) composition, also as EO obtained from plants under drought stress. Carvacrol (50.84-60.03%) was the dominant component in EO; γ-terpinene (19.03-27.33%), p-cymene, α-terpinene, and myrcene, were recognized as other important components in EO. The higher carvacrol and γ-terpinene contents were obtained from summer savory plants with AMF inoculation and the lowest for plants without AMF and under 30% FC. Conclusion According to the present findings, using AMF inoculation could be a sustainable and eco-friendly approach to improve physiological and biochemical characteristics and the essential oil quality of summer savory plants under water shortage conditions.
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Affiliation(s)
- Farzad Rasouli
- Department of Horticulture, Faculty of Agriculture, University of Maragheh, Maragheh, Iran
| | - Trifa Amini
- Department of Horticulture, Faculty of Agriculture, University of Maragheh, Maragheh, Iran
| | - Sona Skrovankova
- Department of Food Analysis and Chemistry, Faculty of Technology, Tomas Bata University in Zlin, Zlin, Czechia
| | - Mohammad Asadi
- Department of Plant Production and Genetics, Faculty of Agriculture, University of Maragheh, Maragheh, Iran
| | | | - Sezai Ercisli
- Department of Horticulture, Faculty of Agriculture, Ataturk University, Erzurum, Türkiye
- HGF Agro, Ata Teknokent, Erzurum, Türkiye
| | - Martina Buckova
- Department of Food Analysis and Chemistry, Faculty of Technology, Tomas Bata University in Zlin, Zlin, Czechia
| | - Martina Mrazkova
- Department of Food Analysis and Chemistry, Faculty of Technology, Tomas Bata University in Zlin, Zlin, Czechia
| | - Jiri Mlcek
- Department of Food Analysis and Chemistry, Faculty of Technology, Tomas Bata University in Zlin, Zlin, Czechia
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Correia TS, Lara TS, dos Santos JA, Sousa LDS, Santana MDF. Arbuscular Mycorrhizal Fungi Promote Physiological and Biochemical Advantages in Handroanthus serratifolius Seedlings Submitted to Different Water Deficits. PLANTS (BASEL, SWITZERLAND) 2022; 11:2731. [PMID: 36297755 PMCID: PMC9609855 DOI: 10.3390/plants11202731] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 09/01/2022] [Accepted: 09/02/2022] [Indexed: 06/16/2023]
Abstract
Climate change causes increasingly longer periods of drought, often causing the death of plants, especially when they are in the early stages of development. Studying the benefits provided by arbuscular mycorrhizal (AM) fungi to plants in different water regimes is an efficient and sustainable strategy to face climate change. Thus, this study investigated the influence of AM fungi on Handroanthus serratifolius seedlings under different water regimes, based on biochemical, and nutritional growth parameters. The experiment was carried out in H. serratifolius seedlings cultivated with mycorrhizas (+AMF) and without mycorrhizas (-AMF) in three water regimes; a severe water deficit (SD), a moderate water deficit (MD), and a well-watered (WW) condition. AM fungi provided greater osmoregulation under water deficit conditions through the accumulation of soluble sugars, total free amino acids, and proline, as well as by reducing sugar. The increase in the absorption of phosphorus and nitrate was observed only in the presence of fungi in the well-watered regimen. A higher percentage of colonization was found in plants submitted to the well-watered regimen. Ultimately, AM fungi promoted biochemical, nutritional, and growth benefits for H. serratifolius seedlings under the water deficit and well-hydrated conditions, proving that AMF can be used to increase the tolerance of H. serratifolius plants, and help them to survive climate change.
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Nadeem M, Wu J, Ghaffari H, Kedir AJ, Saleem S, Mollier A, Singh J, Cheema M. Understanding the Adaptive Mechanisms of Plants to Enhance Phosphorus Use Efficiency on Podzolic Soils in Boreal Agroecosystems. FRONTIERS IN PLANT SCIENCE 2022; 13:804058. [PMID: 35371179 PMCID: PMC8965363 DOI: 10.3389/fpls.2022.804058] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 01/28/2022] [Indexed: 06/14/2023]
Abstract
Being a macronutrient, phosphorus (P) is the backbone to complete the growth cycle of plants. However, because of low mobility and high fixation, P becomes the least available nutrient in podzolic soils; hence, enhancing phosphorus use efficiency (PUE) can play an important role in different cropping systems/crop production practices to meet ever-increasing demands in food, fiber, and fuel. Additionally, the rapidly decreasing mineral phosphate rocks/stocks forced to explore alternative resources and methods to enhance PUE either through improved seed P reserves and their remobilization, P acquisition efficiency (PAE), or plant's internal P utilization efficiency (IPUE) or both for sustainable P management strategies. The objective of this review article is to explore and document important domains to enhance PUE in crop plants grown on Podzol in a boreal agroecosystem. We have discussed P availabilities in podzolic soils, root architecture and morphology, root exudates, phosphate transporters and their role in P uptake, different contributors to enhance PAE and IPUE, and strategies to improve plant PUE in crops grown on podzolic soils deficient in P and acidic in nature.
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Affiliation(s)
- Muhammad Nadeem
- School of Science and the Environment, Memorial University of Newfoundland, Corner Brook, NL, Canada
| | - Jiaxu Wu
- School of Science and the Environment, Memorial University of Newfoundland, Corner Brook, NL, Canada
| | | | - Amana Jemal Kedir
- School of Science and the Environment, Memorial University of Newfoundland, Corner Brook, NL, Canada
- Environmental Science Program, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Shamila Saleem
- Department of Agriculture Extension, Government of Punjab, Khanewal, Pakistan
| | - Alain Mollier
- INRAE, UMR 1391 ISPA, Bordeaux Science Agro, Villenave d'Ornon, France
| | - Jaswinder Singh
- Department of Plant Science, McGill University, Ste-Anne-de-Bellevue, QC, Canada
| | - Mumtaz Cheema
- School of Science and the Environment, Memorial University of Newfoundland, Corner Brook, NL, Canada
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Jayawardhane J, Goyali JC, Zafari S, Igamberdiev AU. The Response of Cowpea ( Vigna unguiculata) Plants to Three Abiotic Stresses Applied with Increasing Intensity: Hypoxia, Salinity, and Water Deficit. Metabolites 2022; 12:metabo12010038. [PMID: 35050160 PMCID: PMC8777733 DOI: 10.3390/metabo12010038] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/20/2021] [Accepted: 12/30/2021] [Indexed: 02/01/2023] Open
Abstract
Exposing plants to gradually increasing stress and to abiotic shock represents two different phenomena. The knowledge on plants’ responses following gradually increasing stress is limited, as many of the studies are focused on abiotic shock responses. We aimed to investigate how cowpea (Vigna unguiculata (L.) Walp.) plants respond to three common agricultural abiotic stresses: hypoxia (applied with the increasing time of exposure to nitrogen gas), salinity (gradually increasing NaCl concentration), and water deficit (gradual decrease in water supply). We hypothesized that the cowpea plants would increase in tolerance to these three abiotic stresses when their intensities rose in a stepwise manner. Following two weeks of treatments, leaf and whole-plant fresh weights declined, soluble sugar levels in leaves decreased, and lipid peroxidation of leaves and roots and the levels of leaf electrolyte leakage increased. Polyphenol oxidase activity in both roots and leaves exhibited a marked increase as compared to catalase and peroxidase. Leaf flavonoid content decreased considerably after hypoxia, while it increased under water deficit treatment. NO emission rates after 3 h in the hypoxically treated plants were similar to the controls, while the other two treatments resulted in lower values of NO production, and these levels further decreased with time. The degree of these changes was dependent on the type of treatment, and the observed effects were more substantial in leaves than in roots. In summary, the responses of cowpea plants to abiotic stress depend on the type and the degree of stress applied and the plant organs.
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Affiliation(s)
- Jayamini Jayawardhane
- Department of Biology, Memorial University of Newfoundland, St. John’s, NL A1B 3X9, Canada; (J.C.G.); (S.Z.)
- Department of Botany, Faculty of Science, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- Correspondence: (J.J.); (A.U.I.)
| | - Juran C. Goyali
- Department of Biology, Memorial University of Newfoundland, St. John’s, NL A1B 3X9, Canada; (J.C.G.); (S.Z.)
- Centre for Aquaculture and Seafood Development, Fisheries and Marine Institute of Memorial University, St. John’s, NL A1C 5R3, Canada
| | - Somaieh Zafari
- Department of Biology, Memorial University of Newfoundland, St. John’s, NL A1B 3X9, Canada; (J.C.G.); (S.Z.)
| | - Abir U. Igamberdiev
- Department of Biology, Memorial University of Newfoundland, St. John’s, NL A1B 3X9, Canada; (J.C.G.); (S.Z.)
- Correspondence: (J.J.); (A.U.I.)
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El-Taher AM, Abd El-Raouf HS, Osman NA, Azoz SN, Omar MA, Elkelish A, Abd El-Hady MAM. Effect of Salt Stress and Foliar Application of Salicylic Acid on Morphological, Biochemical, Anatomical, and Productivity Characteristics of Cowpea ( Vigna unguiculata L.) Plants. PLANTS (BASEL, SWITZERLAND) 2021; 11:plants11010115. [PMID: 35009118 PMCID: PMC8747403 DOI: 10.3390/plants11010115] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/20/2021] [Accepted: 12/27/2021] [Indexed: 05/09/2023]
Abstract
The present study aimed to investigate the impact of salinity on vegetative growth, chemical constituents, and yields of cowpeas (Vigna unguiculata) and the possible benefits of salicylic acid (SA) on these plants after damage from salinity. To achieve these objectives, two pot experiments were carried out at the Faculty of Agriculture, Al-Azhar University, Egypt, during the two growing seasons of 2019 and 2020. The results revealed that salinity significantly decreased, and SA treatment substantially increased the plant height, number of compound leaves, number of internodes per plant, fresh weights of leaves and stems, productivity, photosynthetic pigments content, and concentrations of nitrogen (N), phosphorus (P), and potassium (K) of the cowpea plants compared with the control. The anatomical structure of stems and leaves of the plants were also investigated, and it was found that positive variations in the anatomical structure of the median portion of the main stems and blades of mature foliage leaves were detected in the stressed and SA-treated plants. In conclusion, SA treatment increased the salt stress tolerance of cowpea plants by improving the morphological and physiological attributes of the plants.
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Affiliation(s)
- Ahmed M. El-Taher
- Department of Agriculture Botany, Agriculture Faculty, Al-Azhar University, Cairo 11651, Egypt; (A.M.E.-T.); (H.S.A.E.-R.); (M.A.O.)
| | - Hany S. Abd El-Raouf
- Department of Agriculture Botany, Agriculture Faculty, Al-Azhar University, Cairo 11651, Egypt; (A.M.E.-T.); (H.S.A.E.-R.); (M.A.O.)
- Department of Biology, University College, Taif University, Taif 21944, Saudi Arabia
| | - Nahid A. Osman
- Department of Science and Technology, Ranya Collage, Taif University, Taif 21944, Saudi Arabia;
| | - Samah N. Azoz
- Agricultural Botany, Faculty of Agriculture, Cairo University, Giza 12613, Egypt
- Correspondence:
| | - Magdy A. Omar
- Department of Agriculture Botany, Agriculture Faculty, Al-Azhar University, Cairo 11651, Egypt; (A.M.E.-T.); (H.S.A.E.-R.); (M.A.O.)
| | - Amr Elkelish
- Botany Department, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt;
| | - Mahmoud A. M. Abd El-Hady
- Vegetables and Floriculture Department, Faculty of Agriculture, Damietta University, Damietta 34517, Egypt;
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Wahdan SFM, Tanunchai B, Wu Y, Sansupa C, Schädler M, Dawoud TM, Buscot F, Purahong W. Deciphering Trifolium pratense L. holobiont reveals a microbiome resilient to future climate changes. Microbiologyopen 2021; 10:e1217. [PMID: 34459547 PMCID: PMC8302017 DOI: 10.1002/mbo3.1217] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 06/14/2021] [Accepted: 06/23/2021] [Indexed: 12/24/2022] Open
Abstract
The plant microbiome supports plant growth, fitness, and resistance against climate change. Trifolium pratense (red clover), an important forage legume crop, positively contributes to ecosystem sustainability. However, T. pratense is known to have limited adaptive ability toward climate change. Here, the T. pratense microbiomes (including both bacteria and fungi) of the rhizosphere and the root, shoot, and flower endospheres were comparatively examined using metabarcoding in a field located in Central Germany that mimics the climate conditions projected for the next 50-70 years in comparison with the current climate conditions. Additionally, the ecological functions and metabolic genes of the microbial communities colonizing each plant compartment were predicted using FUNGuild, FAPROTAX, and Tax4Fun annotation tools. Our results showed that the individual plant compartments were colonized by specific microbes. The bacterial and fungal community compositions of the belowground plant compartments did not vary under future climate conditions. However, future climate conditions slightly altered the relative abundances of specific fungal classes of the aboveground compartments. We predicted several microbial functional genes of the T. pratense microbiome involved in plant growth processes, such as biofertilization (nitrogen fixation, phosphorus solubilization, and siderophore biosynthesis) and biostimulation (phytohormone and auxin production). Our findings indicated that T. pratense microbiomes show a degree of resilience to future climate changes. Additionally, microbes inhabiting T. pratense may not only contribute to plant growth promotion but also to ecosystem sustainability.
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Affiliation(s)
- Sara Fareed Mohamed Wahdan
- Department of Soil EcologyUFZ‐Helmholtz Centre for Environmental ResearchHalle (Saale)Germany
- Department of BiologyLeipzig UniversityLeipzigGermany
- Botany DepartmentFaculty of ScienceSuez Canal UniversityIsmailiaEgypt
| | - Benjawan Tanunchai
- Department of Soil EcologyUFZ‐Helmholtz Centre for Environmental ResearchHalle (Saale)Germany
| | - Yu‐Ting Wu
- Department of ForestryNational Pingtung University of Science and TechnologyPingtungTaiwan
| | - Chakriya Sansupa
- Department of Soil EcologyUFZ‐Helmholtz Centre for Environmental ResearchHalle (Saale)Germany
| | - Martin Schädler
- Department of Community EcologyUFZ‐Helmholtz Centre for Environmental ResearchHalle (Saale)Germany
- German Centre for Integrative Biodiversity Research (iDiv)Halle‐Jena‐LeipzigLeipzigGermany
| | - Turki M. Dawoud
- Botany and Microbiology DepartmentCollege of ScienceKing Saud UniversityRiyadhSaudi Arabia
| | - François Buscot
- Department of Soil EcologyUFZ‐Helmholtz Centre for Environmental ResearchHalle (Saale)Germany
- German Centre for Integrative Biodiversity Research (iDiv)Halle‐Jena‐LeipzigLeipzigGermany
- Botany and Microbiology DepartmentCollege of ScienceKing Saud UniversityRiyadhSaudi Arabia
| | - Witoon Purahong
- Department of Soil EcologyUFZ‐Helmholtz Centre for Environmental ResearchHalle (Saale)Germany
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Shtark O, Puzanskiy R, Avdeeva G, Yemelyanov V, Shavarda A, Romanyuk D, Kliukova M, Kirpichnikova A, Tikhonovich I, Zhukov V, Shishova M. Metabolic Alterations in Pisum sativum Roots during Plant Growth and Arbuscular Mycorrhiza Development. PLANTS 2021; 10:plants10061033. [PMID: 34063836 PMCID: PMC8224052 DOI: 10.3390/plants10061033] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/17/2021] [Accepted: 05/18/2021] [Indexed: 01/04/2023]
Abstract
Intensive exchange of nutrients is a crucial part of the complex interaction between a host plant and fungi within arbuscular mycorrhizal (AM) symbiosis. For the first time, the present study demonstrates how inoculation with AMF Rhizophagus irregularis affects the pea (Pisum sativum L.) root metabolism at key stages of plant development. These correspond to days 21 (vegetation), 42 (flowering initiation), and 56 (fruiting-green pod). Metabolome profiling was carried out by means of a state-of-the-art GC-MS technique. The content shifts revealed include lipophilic compounds, sugars, carboxylates, and amino acids. The metabolic alterations were principally dependent on the stage of plant development but were also affected by the development of AM fungi, a fact which highlights interaction between symbiotic partners. The comparison of the present data with the results of leaf metabolome profiling earlier obtained did not reveal common signatures of metabolic response to mycorrhization in leaves and roots. We supposed that the feedback for the development and symbiotic interaction on the part of the supraorganismic system (root + AM fungi) was the cause of the difference between the metabolic profile shift in leaf and root cells that our examination revealed. New investigations are required to expand our knowledge of metabolome plasticity of the whole organism and/or system of organisms, and such results might be put to use for the intensification of sustainable agriculture.
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Affiliation(s)
- Oksana Shtark
- Department of Biotechnology, All-Russia Research Institute for Agricultural Microbiology, Pushkin, 196608 St. Petersburg, Russia; (D.R.); (M.K.); (I.T.); (V.Z.)
- Correspondence: (O.S.); (M.S.); Tel.: +7-812-470-5183 (O.S.); +7-812-328-9695 (M.S.)
| | - Roman Puzanskiy
- Laboratory of Analytical Phytochemistry, Komarov Botanical Institute of the Russian Academy of Sciences, 193022 St. Petersburg, Russia; (R.P.); (A.S.)
- Faculty of Biology, St. Petersburg State University, 199034 St. Petersburg, Russia; (G.A.); (V.Y.); (A.K.)
| | - Galina Avdeeva
- Faculty of Biology, St. Petersburg State University, 199034 St. Petersburg, Russia; (G.A.); (V.Y.); (A.K.)
| | - Vladislav Yemelyanov
- Faculty of Biology, St. Petersburg State University, 199034 St. Petersburg, Russia; (G.A.); (V.Y.); (A.K.)
| | - Alexey Shavarda
- Laboratory of Analytical Phytochemistry, Komarov Botanical Institute of the Russian Academy of Sciences, 193022 St. Petersburg, Russia; (R.P.); (A.S.)
- Center for Molecular and Cell Technologies, St. Petersburg State University, 199034 St. Petersburg, Russia
| | - Daria Romanyuk
- Department of Biotechnology, All-Russia Research Institute for Agricultural Microbiology, Pushkin, 196608 St. Petersburg, Russia; (D.R.); (M.K.); (I.T.); (V.Z.)
| | - Marina Kliukova
- Department of Biotechnology, All-Russia Research Institute for Agricultural Microbiology, Pushkin, 196608 St. Petersburg, Russia; (D.R.); (M.K.); (I.T.); (V.Z.)
| | - Anastasia Kirpichnikova
- Faculty of Biology, St. Petersburg State University, 199034 St. Petersburg, Russia; (G.A.); (V.Y.); (A.K.)
| | - Igor Tikhonovich
- Department of Biotechnology, All-Russia Research Institute for Agricultural Microbiology, Pushkin, 196608 St. Petersburg, Russia; (D.R.); (M.K.); (I.T.); (V.Z.)
- Faculty of Biology, St. Petersburg State University, 199034 St. Petersburg, Russia; (G.A.); (V.Y.); (A.K.)
| | - Vladimir Zhukov
- Department of Biotechnology, All-Russia Research Institute for Agricultural Microbiology, Pushkin, 196608 St. Petersburg, Russia; (D.R.); (M.K.); (I.T.); (V.Z.)
| | - Maria Shishova
- Faculty of Biology, St. Petersburg State University, 199034 St. Petersburg, Russia; (G.A.); (V.Y.); (A.K.)
- Correspondence: (O.S.); (M.S.); Tel.: +7-812-470-5183 (O.S.); +7-812-328-9695 (M.S.)
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Ait-El-Mokhtar M, Baslam M, Ben-Laouane R, Anli M, Boutasknit A, Mitsui T, Wahbi S, Meddich A. Alleviation of Detrimental Effects of Salt Stress on Date Palm (Phoenix dactylifera L.) by the Application of Arbuscular Mycorrhizal Fungi and/or Compost. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2020. [DOI: 10.3389/fsufs.2020.00131] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
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11
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Al-Arjani ABF, Hashem A, Abd_Allah EF. Arbuscular mycorrhizal fungi modulates dynamics tolerance expression to mitigate drought stress in Ephedra foliata Boiss. Saudi J Biol Sci 2020; 27:380-394. [PMID: 31889861 PMCID: PMC6933241 DOI: 10.1016/j.sjbs.2019.10.008] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 10/13/2019] [Accepted: 10/20/2019] [Indexed: 01/19/2023] Open
Abstract
Arbuscular mycorrhizal fungi (AMF) are one of the most important drivers of soil ecosystem dynamics. AMF have the potential to improve plant growth and development by modulating key hormonal pathways, which result in decreasing the adverse impact of abiotic stress, such as drought. Pot experiments were conducted in this study to investigate the ability of AMF to ameliorate the adverse impact of drought in Ephedra foliate. Non-inoculated AMF E. foliate (Ef) plants, exhibited reduced growth in response to drought stress with a concomitant lowering of chlorophyll pigments, relative to non-stressed and AMF inoculated plant. AMF inoculated E. foliate showed improved nitrogen metabolism by positively regulating nitrate and nitrite reductase activity which results in greater ammonium availability for the synthesis of amino acids. Inoculation with AMF also increased antioxidant enzyme activity, ascorbic acid contents, and reduction in glutathione level. This resulted in significant amelioration of oxidative damage to plant membranes by restricting the excess generation of reactive oxygen species (ROS), such as hydrogen peroxide. Greater content of proline, glucose, and total soluble protein in AMF-inoculated plants provided further benefit to E. foliate plants and their ability to withstand drought stress, and also evident by a greater level of sucrose phosphate synthase activity. AMF significantly enhanced the uptake of essential nutrients like K, Mg, and Ca. Importantly, higher concentrations of plant hormones, including indole acetic acid (IAA), indole butyric acid (IBA), gibberellic acid (GA), and abscisic acid (ABA), were maintained in AMF-inoculated Ef plants. AMF inoculation also boosted phosphorous metabolism by increasing alkaline and acid phosphatase enzyme activity. In summary, AMF-inoculation of Ef plants significantly reduced the deleterious effect of drought stress by up-regulating the antioxidant defense system, synthesis of osmolytes, and maintaining phytohormone levels.
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Affiliation(s)
- Al-Bandari Fahad Al-Arjani
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
| | - Abeer Hashem
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
- Mycology and Plant Disease Survey Department, Plant Pathology Research Institute, ARC, Giza 12511, Egypt
| | - Elsayed Fathi Abd_Allah
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
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Hashem A, Abd_Allah EF, Alqarawi AA, Wirth S, Egamberdieva D. Comparing symbiotic performance and physiological responses of two soybean cultivars to arbuscular mycorrhizal fungi under salt stress. Saudi J Biol Sci 2019; 26:38-48. [PMID: 30622405 PMCID: PMC6319201 DOI: 10.1016/j.sjbs.2016.11.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 11/18/2016] [Accepted: 11/21/2016] [Indexed: 11/18/2022] Open
Abstract
The presented experiments evaluated the symbiotic performance of soybean genotypes with contrasting salt stress tolerance to arbuscular mycorrhizal fungi (AMF) inoculation. In addition, the physiological stress tolerance mechanisms in plants derived from mutualistic interactions between AMF and the host plants were evaluated. Plant growth, nodulation, nitrogenase activity and levels of endogenous growth hormones, such as indole acetic acid and indole butyric acid, of salt-tolerant and salt-sensitive soybean genotypes significantly decreased at 200 mM NaCl. The inoculation of soybean with AMF improved the symbiotic performance of both soybean genotypes by improving nodule formation, leghemoglobin content, nitrogenase activity and auxin synthesis. AMF colonization also protected soybean genotypes from salt-induced membrane damage and reduced the production of hydrogen peroxide, subsequently reducing the production of TBARS and reducing lipid peroxidation. In conclusion, the results of the present investigation indicate that AMF improve the symbiotic performance of soybean genotypes regardless of their salt stress tolerance ability by mitigating the negative effect of salt stress and stimulating endogenous level of auxins that contribute to an improved root system and nutrient acquisition under salt stress.
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Affiliation(s)
- Abeer Hashem
- Botany and Microbiology Department, Faculty of Science, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
- Mycology and Plant Disease Survey Department, Plant Pathology Research Institute, Agriculture Research Center, Giza 12511, Egypt
| | - Elsayed Fathi Abd_Allah
- Plant Production Department, Faculty of Food & Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
- Seed Pathology Department, Plant Pathology Research Institute, Agriculture Research Center, Giza 12511, Egypt
| | - Abdulaziz A. Alqarawi
- Plant Production Department, Faculty of Food & Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
| | - Stephan Wirth
- Institute of Landscape Biogeochemistry, Leibniz Centre for Agricultural Landscape Research (ZALF), 15374 Müncheberg, Germany
| | - Dilfuza Egamberdieva
- Institute of Landscape Biogeochemistry, Leibniz Centre for Agricultural Landscape Research (ZALF), 15374 Müncheberg, Germany
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Sukweenadhi J, Balusamy SR, Kim YJ, Lee CH, Kim YJ, Koh SC, Yang DC. A Growth-Promoting Bacteria, Paenibacillus yonginensis DCY84 T Enhanced Salt Stress Tolerance by Activating Defense-Related Systems in Panax ginseng. FRONTIERS IN PLANT SCIENCE 2018; 9:813. [PMID: 30083171 PMCID: PMC6065202 DOI: 10.3389/fpls.2018.00813] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 05/25/2018] [Indexed: 05/18/2023]
Abstract
Panax ginseng (C.A. Mayer) is a well-known medicinal plant used in traditional medicine in Korea that experiences serious salinity stress related to weather changes or incorrect fertilizer application. In ginseng, the use of Paenibacillus yonginensis DCY84T to improve salt stress tolerance has not been thoroughly explored. Therefore, we studied the role of P. yonginensis DCY84T under short-term and long-term salinity stress conditions in a controlled environment. In vitro testing of DCY84T revealed high indole acetic acid (IAA) production, siderophore formation, phosphate solubilization and anti-bacterial activity. We determined that 10-min dip in 1010 CFU/ml DCY84T was sufficient to protect ginseng against short-term salinity stress (osmotic stress) upon exposure to 300 mM NaCl treatment by enhancing nutrient availability, synthesizing hydrolyzing enzymes and inducing osmolyte production. Upon exposure to salinity stress (oxidative and ionic stress), strain DCY84T-primed ginseng seedlings were protected by the induction of defense-related systems such as ion transport, ROS scavenging enzymes, proline content, total sugars, and ABA biosynthetic genes, as well as genes involved in root hair formation. Additionally, ginseng primed with DCY84T and exposed to 300 mM NaCl showed the same metabolite profile as control ginseng plants, suggesting that DCY84T effectively reduced salt stress. These results indicated that DCY84T can be widely used as a microbial inoculant to protect ginseng plants against salinity stress conditions.
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Affiliation(s)
- Johan Sukweenadhi
- Graduate School of Biotechnology, Kyung Hee University, Yongin, South Korea
- Faculty of Biotechnology, University of Surabaya, Surabaya, Indonesia
| | - Sri R. Balusamy
- Department of Food Science and Biotechnology, Sejong University, Seoul, South Korea
| | - Yeon-Ju Kim
- Department of Oriental Medicinal Biotechnology, College of Life Science, Kyung Hee University, Yongin, South Korea
- *Correspondence: Yeon-Ju Kim
| | - Choong H. Lee
- Department of Environmental Engineering, Korea Maritime and Ocean University, Busan, South Korea
| | - Yu-Jin Kim
- Department of Oriental Medicinal Biotechnology, College of Life Science, Kyung Hee University, Yongin, South Korea
| | - Sung C. Koh
- Department of Bioscience and Biotechnology, Konkuk University, Seoul, South Korea
| | - Deok C. Yang
- Graduate School of Biotechnology, Kyung Hee University, Yongin, South Korea
- Department of Oriental Medicinal Biotechnology, College of Life Science, Kyung Hee University, Yongin, South Korea
- Deok C. Yang
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Egamberdieva D, Wirth S, Abd-Allah EF. Tripartite Interaction Among Root-Associated Beneficial Microbes Under Stress. RHIZOTROPHS: PLANT GROWTH PROMOTION TO BIOREMEDIATION 2017:219-236. [DOI: 10.1007/978-981-10-4862-3_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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15
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Hashem A, Abd_Allah EF, Alqarawi AA, Al-Huqail AA, Wirth S, Egamberdieva D. The Interaction between Arbuscular Mycorrhizal Fungi and Endophytic Bacteria Enhances Plant Growth of Acacia gerrardii under Salt Stress. Front Microbiol 2016; 7:1089. [PMID: 27486442 PMCID: PMC4949997 DOI: 10.3389/fmicb.2016.01089] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 06/29/2016] [Indexed: 11/13/2022] Open
Abstract
Microbes living symbiotically in plant tissues mutually cooperate with each other by providing nutrients for proliferation of the partner organism and have a beneficial effect on plant growth. However, few studies thus far have examined the interactive effect of endophytic bacteria and arbuscular mycorrhizal fungi (AMF) in hostile conditions and their potential to improve plant stress tolerance. In this study, we investigated how the synergistic interactions of endophytic bacteria and AMF affect plant growth, nodulation, nutrient acquisition and stress tolerance of Acacia gerrardii under salt stress. Plant growth varied between the treatments with both single inoculants and was higher in plants inoculated with the endophytic B. subtilis strain than with AMF. Co-inoculated A. gerrardii had a significantly greater shoot and root dry weight, nodule number, and leghemoglobin content than those inoculated with AMF or B. subtilis alone under salt stress. The endophytic B. subtilis could alleviate the adverse effect of salt on AMF colonization. The differences in nitrate and nitrite reductase and nitrogenase activities between uninoculated plants and those inoculated with AMF and B. subtilis together under stress were significant. Both inoculation treatments, either B. subtilis alone or combined with AMF, enhanced the N, P, K, Mg, and Ca contents and phosphatase activities in salt-stressed A. gerrardii tissues and reduced Na and Cl concentration, thereby protecting salt-stressed plants from ionic and osmotic stress-induced changes. In conclusion, our results indicate that endophytic bacteria and AMF contribute to a tripartite mutualistic symbiosis in A. gerrardii and are coordinately involved in the plant adaptation to salt stress tolerance.
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Affiliation(s)
- Abeer Hashem
- Department of Botany and Microbiology, Faculty of Science, King Saud UniversityRiyadh, Saudi Arabia
- Department of Mycology and Plant Disease Survey, Agriculture Research Center, Plant Pathology Research InstituteGiza, Egypt
| | - Elsayed F. Abd_Allah
- Department of Plant Production, Faculty of Food and Agricultural Sciences, King Saud UniversityRiyadh, Saudi Arabia
| | - Abdulaziz A. Alqarawi
- Department of Plant Production, Faculty of Food and Agricultural Sciences, King Saud UniversityRiyadh, Saudi Arabia
| | - Asma A. Al-Huqail
- Department of Botany and Microbiology, Faculty of Science, King Saud UniversityRiyadh, Saudi Arabia
| | - Stephan Wirth
- Leibniz Centre for Agricultural Landscape Research, Institute of Landscape BiogeochemistryMüncheberg, Germany
| | - Dilfuza Egamberdieva
- Leibniz Centre for Agricultural Landscape Research, Institute of Landscape BiogeochemistryMüncheberg, Germany
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Gómez-Bellot MJ, Nortes PA, Ortuño MF, Romero C, Fernández-García N, Sánchez-Blanco MJ. Influence of arbuscular mycorrhizal fungi and treated wastewater on water relations and leaf structure alterations of Viburnum tinus L. plants during both saline and recovery periods. JOURNAL OF PLANT PHYSIOLOGY 2015; 188:96-105. [PMID: 26476190 DOI: 10.1016/j.jplph.2015.09.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 09/04/2015] [Accepted: 09/09/2015] [Indexed: 06/05/2023]
Abstract
Nowadays, irrigation with low quality water is becoming an alternative to satisfy the needs of crops. However, some plant species have to deal with high salinity of reclaimed water, by adapting their physiological behaviour during both saline and recovery periods and developing morphological changes in their leaves. The application of arbuscular mycorrhizal fungi (AMF) could also be a suitable option to mitigate the negative effects of this kind of water, although the effectiveness of plant-AMF association is influenced by many factors. In this work, during forty weeks, the combined effect of Glomus iranicum var. tenuihypharum and two types of water: control, C, EC<0.9 dS m(-1) and reclaimed water, RW (with EC: 4 dS m(-1) during a first saline period and EC: 6 dS m(-1) during a second saline period) was evaluated for laurustinus plants (Viburnum tinus L.) transplanted in soil. This was followed by a recovery period of eight weeks, when all the plants were irrigated in the control irrigation conditions. Seasonal and daily changes in stem water potential (Ψstem), stomatal conductance (gs), photosynthesis (Pn) and leaf internal CO2 concentration (Ci) of laurustinus plants were evaluated. Leaf structure alterations, nutrient imbalance, height and leaf hydraulic conductivity (Kleaf) were also determined. Due to the high difficulty of absorbing water from the soil, RW plants showed a high volumetric water content (θv) in soil. The stem water potential and the stomatal conductance (gs) values were reduced in RW plants throughout the second saline period. These decreases were also found during the day. Leaf Ca(2+)/Na(+) and K(+)/Na(+) ratios diminished in RW plants respect to the C plants due to the Na(+) accumulation, although height and chlorophyll content values did not show statistical differences. Leaves from RW plants showed a significantly thicker mesophyll than Control leaves as a consequence of high EC. The area of palisade parenchyma (PP) increased while the area of spongy parenchyma (SP) decreased in RW leaves with respect to the C leaves. These structural changes could be considered as a strategy to maximize photosynthesis potential in saline conditions. Mycorrhizal inoculation improved the water status of both C and RW plants by increasing their Ψstem and gs values. As regards leaf structure, AMF showed an opposite effect to salinity for PP and SP. At the end of the recovery period, hardly any statistical differences of physiological parameters were found between treatments, although a tendency to improve them was observed in inoculated plants. In any case, the leaf structural changes and the great reduction in Kleaf observed at Ψleaf below -1.5 MPa would constitute an important mechanism for laurustinus plants to reduce the water loses produced by salinity.
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Affiliation(s)
- María José Gómez-Bellot
- Department of Irrigation, Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), P.O. Box 164, 30100 Espinardo-Murcia, Spain
| | - Pedro Antonio Nortes
- Department of Irrigation, Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), P.O. Box 164, 30100 Espinardo-Murcia, Spain
| | - María Fernanda Ortuño
- Department of Irrigation, Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), P.O. Box 164, 30100 Espinardo-Murcia, Spain
| | - Cristina Romero
- Department of Irrigation, Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), P.O. Box 164, 30100 Espinardo-Murcia, Spain
| | - Nieves Fernández-García
- Department of Stress Biology and Plant Pathology, Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), P.O. Box 164, 30100 Espinardo-Murcia, Spain
| | - María Jesús Sánchez-Blanco
- Department of Irrigation, Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), P.O. Box 164, 30100 Espinardo-Murcia, Spain.
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Edgar RC. UPARSE: highly accurate OTU sequences from microbial amplicon reads. Nat Methods 2013; 10:996-998. [PMID: 23955772 DOI: 10.1007/978-3-319-44409-3_5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Accepted: 07/15/2013] [Indexed: 05/20/2023]
Abstract
Amplified marker-gene sequences can be used to understand microbial community structure, but they suffer from a high level of sequencing and amplification artifacts. The UPARSE pipeline reports operational taxonomic unit (OTU) sequences with ≤1% incorrect bases in artificial microbial community tests, compared with >3% incorrect bases commonly reported by other methods. The improved accuracy results in far fewer OTUs, consistently closer to the expected number of species in a community.
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