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Ben Youssef R, Jelali N, Martínez-Andújar C, Abdelly C, Hernández JA. Salicylic Acid and Calcium Chloride Seed Priming: A Prominent Frontier in Inducing Mineral Nutrition Balance and Antioxidant System Capacity to Enhance the Tolerance of Barley Plants to Salinity. PLANTS (BASEL, SWITZERLAND) 2024; 13:1268. [PMID: 38732483 PMCID: PMC11085932 DOI: 10.3390/plants13091268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 04/28/2024] [Accepted: 04/29/2024] [Indexed: 05/13/2024]
Abstract
The current investigation aims to underline the impact of salicylic acid or calcium chloride seed pre-treatments on mineral status and oxidative stress markers, namely levels of electrolyte leakage (EL) and lipid peroxidation levels, measured as thiobarbituric reactive substances (TBARS), and the activity of some antioxidant enzymes in roots and leaves of plants in two barley species grown under various salt treatments. Overall, our results revealed that salinity inhibits essential nutrient absorption such as iron, calcium, magnesium and potassium and stimulates the absorption of sodium. Also, this environmental constraint induced oxidative stress in plants in comparison with the control conditions. This state of oxidative stress is reflected by an increase in TBARS content as well as the stimulation of EL values. In addition, salinity induced disturbances in the activity of antioxidant enzymes, which were mainly dependent on the applied salt concentration and the species. In addition, Hordeum marinum maintained high antioxidant enzyme activity and low levels of oxidative stress parameters, which reinforces its salt-tolerant character. Importantly, salicylic acid or calcium chloride seed priming alleviated the mineral imbalance and the oxidative damage induced by salinity. Moreover, seed priming improves iron, calcium magnesium and potassium content and limitsthe accumulation of sodium. Also, both treatments not only decrease TBARS levels and limit EL, but they also stimulate the antioxidant enzyme activities in the leaves and roots of the stressed plants as compared with stressed plants grown from non-primed seeds. Interestingly, the beneficial effects of the mentioned treatments were more notable on Hordeum vulgare species.
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Affiliation(s)
- Rim Ben Youssef
- Laboratory of Extremophile Plants, Centre of Biotechnology of Borj-Cédria (CBBC), P.O. Box 901, Hammam-Lif 2050, Tunisia; (N.J.); (C.A.)
- Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis 1060, Tunisia
- Group of Fruit Trees Biotechnology, Centro de Edafología y Biología Aplicada del Segura (CEBAS), Consejo Superior de Investigaciones Científicas (CSIC), 30100 Murcia, Spain
- Department of Plant Nutrition, Centro de Edafología y Biología Aplicada del Segura (CEBAS), Consejo Superior de Investigaciones Científicas (CSIC), 30100 Murcia, Spain;
| | - Nahida Jelali
- Laboratory of Extremophile Plants, Centre of Biotechnology of Borj-Cédria (CBBC), P.O. Box 901, Hammam-Lif 2050, Tunisia; (N.J.); (C.A.)
| | - Cristina Martínez-Andújar
- Department of Plant Nutrition, Centro de Edafología y Biología Aplicada del Segura (CEBAS), Consejo Superior de Investigaciones Científicas (CSIC), 30100 Murcia, Spain;
| | - Chedly Abdelly
- Laboratory of Extremophile Plants, Centre of Biotechnology of Borj-Cédria (CBBC), P.O. Box 901, Hammam-Lif 2050, Tunisia; (N.J.); (C.A.)
| | - José Antonio Hernández
- Group of Fruit Trees Biotechnology, Centro de Edafología y Biología Aplicada del Segura (CEBAS), Consejo Superior de Investigaciones Científicas (CSIC), 30100 Murcia, Spain
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Xu H, Zhu M, Chen X. Fungal epiphytes differentially regulate salt tolerance of invasive Ipomoea cairica according to salt stress levels. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:4797-4807. [PMID: 38105332 DOI: 10.1007/s11356-023-31540-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 12/10/2023] [Indexed: 12/19/2023]
Abstract
Fungal symbionts can improve plant tolerance to salt stress. However, the interaction of epiphytic Fusarium oxysporum and Fusarium fujikuroi with the tolerance of the invasive plant Ipomoea cairica against saline coastal habitats is largely unknown. This study aimed to investigate the interaction of the mixture of the two epiphytic fungi with salt tolerance of I. cairica. Surface-sterilized I. cairica cuttings inoculated (E+) and non-inoculated (E-) with the fungal mixture were cultivated with 2, 3, and 5 parts per thousand (PPT) of NaCl solutions to simulate mild, moderate, and severe salt stress, respectively. The hydroponic experiment showed that the growth inhibition and peroxidation damages of E+ and E- cuttings were aggravated with salinity. Noteworthily, E+ cuttings had higher peroxidase (POD) and catalase (CAT) activities, chlorophyll content, total biomass, aboveground biomass, total shoot length and secondary shoot number, but lower root-to-shoot ratio than E- cuttings under 2 and 3 PPT NaCl conditions. Moreover, E+ had higher superoxide dismutase (SOD) activity and proline content but lower belowground biomass and malondialdehyde (MDA) content than E- cuttings under 3 PPT NaCl condition. However, lower SOD, POD, and CAT activities, and chlorophyll content, but higher MDA content occurred in E+ cuttings than in E- cuttings under 5 PPT NaCl condition. These findings suggested that the mixture of the two epiphytic fungi increased salt tolerance of I. cairica mainly through increasing its antioxidation ability and chlorophyll stability under mildly and moderately saline conditions, but decreased salt tolerance of this plant in an opposite way under severely saline conditions.
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Affiliation(s)
- Hua Xu
- School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan, 430048, China
| | - Minjie Zhu
- Hunan Polytechnic of Environment and Biology, Hengyang, 421005, China
| | - Xuhui Chen
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, 110161, China.
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Grande T, Vornoli A, Lubrano V, Vizzarri F, Raffaelli A, Gabriele M, Novoa J, Sandoval C, Longo V, Echeverria MC, Pozzo L. Chlamydomonas agloeformis from the Ecuadorian Highlands: Nutrients and Bioactive Compounds Profiling and In Vitro Antioxidant Activity. Foods 2023; 12:3147. [PMID: 37685081 PMCID: PMC10487033 DOI: 10.3390/foods12173147] [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: 06/30/2023] [Revised: 07/27/2023] [Accepted: 08/18/2023] [Indexed: 09/10/2023] Open
Abstract
Green microalgae are single-celled eukaryotic organisms that, in recent years, are becoming increasingly important in the nutraceutical, cosmetic, and pharmaceutical fields because of their high content of bioactive compounds. In this study, a particular green microalga was isolated from freshwater highland lakes of Ecuador and morphologically and molecularly identified as Chlamydomonas agloeformis (ChA), and it was studied for nutritional and nutraceutical properties. The phenolic composition and the fatty acids profile of lyophilized cells were determined. The methanolic extract was analyzed for the phenolic compounds profile and the antioxidant capacity by means of in vitro tests. Finally, Human Microvascular Endothelial Cells (HMEC-1) were exploited to explore the capacity of ChA to reduce the endothelial damage induced by oxidized LDL-mediated oxidative stress. The extract showed a good antioxidant ability thanks to the high content in polyphenolic compounds. The observed decrease in HMEC-1 cells endothelial damage also was probably due to the antioxidant compounds present in the extract. Based on the outcomes of our in vitro assays, ChA demonstrated to be a promising source of bioactive compounds possessing exceptional antioxidant capacities which make it a prospective functional food.
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Affiliation(s)
- Teresa Grande
- Institute of Agricultural Biology and Biotechnology-National Research Council (IBBA-CNR), Via Moruzzi 1, 56124 Pisa, Italy; (T.G.); (A.V.); (A.R.); (M.G.); (V.L.)
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”, University of Florence, Viale Morgagni 50, 50134 Florence, Italy
| | - Andrea Vornoli
- Institute of Agricultural Biology and Biotechnology-National Research Council (IBBA-CNR), Via Moruzzi 1, 56124 Pisa, Italy; (T.G.); (A.V.); (A.R.); (M.G.); (V.L.)
| | - Valter Lubrano
- Fondazione G. Monasterio, CNR/Regione Toscana, 56124 Pisa, Italy;
| | - Francesco Vizzarri
- National Agricultural and Food Centre Nitra, Hlohovecká 2, 95141 Lužianky, Slovakia;
| | - Andrea Raffaelli
- Institute of Agricultural Biology and Biotechnology-National Research Council (IBBA-CNR), Via Moruzzi 1, 56124 Pisa, Italy; (T.G.); (A.V.); (A.R.); (M.G.); (V.L.)
- Crop Science Research Center, Scuola Superiore Sant’Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy
| | - Morena Gabriele
- Institute of Agricultural Biology and Biotechnology-National Research Council (IBBA-CNR), Via Moruzzi 1, 56124 Pisa, Italy; (T.G.); (A.V.); (A.R.); (M.G.); (V.L.)
| | - Jeniffer Novoa
- eCIER Research Group, Department of Biotechnology, Universidad Técnica del Norte, Av. 17 de Julio 5–21 y Gral. José María Córdova, Ibarra 100150, Ecuador; (J.N.); (C.S.); (M.C.E.)
| | - Carla Sandoval
- eCIER Research Group, Department of Biotechnology, Universidad Técnica del Norte, Av. 17 de Julio 5–21 y Gral. José María Córdova, Ibarra 100150, Ecuador; (J.N.); (C.S.); (M.C.E.)
| | - Vincenzo Longo
- Institute of Agricultural Biology and Biotechnology-National Research Council (IBBA-CNR), Via Moruzzi 1, 56124 Pisa, Italy; (T.G.); (A.V.); (A.R.); (M.G.); (V.L.)
| | - Maria Cristina Echeverria
- eCIER Research Group, Department of Biotechnology, Universidad Técnica del Norte, Av. 17 de Julio 5–21 y Gral. José María Córdova, Ibarra 100150, Ecuador; (J.N.); (C.S.); (M.C.E.)
| | - Luisa Pozzo
- Institute of Agricultural Biology and Biotechnology-National Research Council (IBBA-CNR), Via Moruzzi 1, 56124 Pisa, Italy; (T.G.); (A.V.); (A.R.); (M.G.); (V.L.)
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Garcia-Caparros P, Al-Azzawi MJ, Flowers TJ. Economic Uses of Salt-Tolerant Plants. PLANTS (BASEL, SWITZERLAND) 2023; 12:2669. [PMID: 37514283 PMCID: PMC10385539 DOI: 10.3390/plants12142669] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 07/09/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023]
Abstract
Climate change is likely to affect the ability of world agricultural systems to provide food, fibre, and fuel for the growing world population, especially since the area of salinised land will increase. However, as few species of plants (less than 1% of all plant species) can tolerate saline soils, we believe it is important to evaluate their potential as crops for salinised soils. We have analysed the economic and potential economic uses of plants that are listed in the database eHALOPH, including the most tolerant species, halophytes. For nine main categories of economic value, we found a total of 1365 uses amongst all species listed in eHALOPH as of July 2022; this number reduced to 918 amongst halophytes. We did not find any obvious differences in rankings between the more tolerant halophytes and the whole group of salt-tolerant plants, where the order of use was medical, followed by forage, traditional medicine, food and drink, fuel, fuelwood, and bioenergy. While many species are potentially important as crops, the effects of salt concentration on their uses are much less well documented. Increasing salt concentration can increase, decrease, or have no effect on the concentration of antioxidants found in different species, but there is little evidence on the effect of salinity on potential yield (the product of concentration and biomass). The effect of salinity on forage quality again varies with species, often being reduced, but the overall consequences for livestock production have rarely been evaluated. Salt-tolerant plants have potential uses in the bioremediation of degraded land (including revegetation, phytoremediation, and extraction of NaCl) as well as sources of biofuels, although any use of saline water for the sustainable irrigation of salt-tolerant crops must be viewed with extreme caution.
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Affiliation(s)
- Pedro Garcia-Caparros
- Department of Superior School Engineering, University of Almería, Ctra. Sacramento s/n, La Cañada de San Urbano, 04120 Almería, Spain
| | | | - Timothy J Flowers
- School of Life Sciences, University of Sussex, Falmer, Brighton BN1 9QG, UK
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Vornoli A, Grande T, Lubrano V, Vizzarri F, Gorelli C, Raffaelli A, Della Croce CM, Baca SZ, Sandoval C, Longo V, Pozzo L, Echeverria C. In Vitro Characterization of Antioxidant, Antibacterial and Antimutagenic Activities of the Green Microalga Ettlia pseudoalveolaris. Antioxidants (Basel) 2023; 12:1308. [PMID: 37372038 DOI: 10.3390/antiox12061308] [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: 05/24/2023] [Revised: 06/07/2023] [Accepted: 06/17/2023] [Indexed: 06/29/2023] Open
Abstract
Recently, green microalgae have gained importance due to their nutritional and bioactive compounds, which makes them some of the most promising and innovative functional foods. The aim of this study was to evaluate the chemical profile and the in vitro antioxidant, antimicrobial and antimutagenic activity of an aqueous extract of the green microalga Ettlia pseudoalveolaris, obtained from the freshwater lakes of the Ecuadorian Highlands. Human microvascular endothelial cells (HMEC-1) were used to determine the ability of the microalga to reduce the endothelial damage caused by hydrogen peroxide-induced oxidative stress. Furthermore, the eukaryotic system Saccharomyces cerevisiae was used to evaluate the possible cytotoxic, mutagenic and antimutagenic effect of E. pseudoalveolaris. The extract showed a notable antioxidant capacity and a moderate antibacterial activity mostly due to the high content in polyphenolic compounds. It is likely that the antioxidant compounds present in the extract were also responsible for the observed reduction in endothelial damage of HMEC-1 cells. An antimutagenic effect through a direct antioxidant mechanism was also found. Based on the results of in vitro assays, E. pseudoalveolaris proved to be a good source of bioactive compounds and antioxidant, antibacterial and antimutagenic capacities making it a potential functional food.
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Affiliation(s)
- Andrea Vornoli
- Institute of Agricultural Biology and Biotechnology (IBBA), National Research Council (CNR), Via Moruzzi 1, 56124 Pisa, Italy
| | - Teresa Grande
- Institute of Agricultural Biology and Biotechnology (IBBA), National Research Council (CNR), Via Moruzzi 1, 56124 Pisa, Italy
- Department of Experimental and Clinical Biomedical Sciences "Mario Serio", University of Florence, Viale Morgagni 50, 50134 Florence, Italy
| | - Valter Lubrano
- Fondazione G. Monasterio, CNR/Regione Toscana, 56124 Pisa, Italy
| | - Francesco Vizzarri
- National Agricultural and Food Centre Nitra, Hlohoveck'a 2, 95141 Lužianky, Slovakia
| | - Chiara Gorelli
- Institute of Agricultural Biology and Biotechnology (IBBA), National Research Council (CNR), Via Moruzzi 1, 56124 Pisa, Italy
| | - Andrea Raffaelli
- Institute of Agricultural Biology and Biotechnology (IBBA), National Research Council (CNR), Via Moruzzi 1, 56124 Pisa, Italy
- Crop Science Research Center, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy
| | - Clara Maria Della Croce
- Institute of Agricultural Biology and Biotechnology (IBBA), National Research Council (CNR), Via Moruzzi 1, 56124 Pisa, Italy
| | - Santiago Zarate Baca
- eCIER Research Group, Department of Biotechnology, Universidad Técnica del Norte, Av. 17 de Julio 5-21 y Gral. José María Córdova, Ibarra 100150, Ecuador
| | - Carla Sandoval
- eCIER Research Group, Department of Biotechnology, Universidad Técnica del Norte, Av. 17 de Julio 5-21 y Gral. José María Córdova, Ibarra 100150, Ecuador
| | - Vincenzo Longo
- Institute of Agricultural Biology and Biotechnology (IBBA), National Research Council (CNR), Via Moruzzi 1, 56124 Pisa, Italy
| | - Luisa Pozzo
- Institute of Agricultural Biology and Biotechnology (IBBA), National Research Council (CNR), Via Moruzzi 1, 56124 Pisa, Italy
| | - Cristina Echeverria
- eCIER Research Group, Department of Biotechnology, Universidad Técnica del Norte, Av. 17 de Julio 5-21 y Gral. José María Córdova, Ibarra 100150, Ecuador
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Li C, Mur LA, Wang Q, Hou X, Zhao C, Chen Z, Wu J, Guo Q. ROS scavenging and ion homeostasis is required for the adaptation of halophyte Karelinia caspia to high salinity. FRONTIERS IN PLANT SCIENCE 2022; 13:979956. [PMID: 36262663 PMCID: PMC9574326 DOI: 10.3389/fpls.2022.979956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 08/15/2022] [Indexed: 06/16/2023]
Abstract
The halophyte Karelinia caspia has not only fodder and medical value but also can remediate saline-alkali soils. Our previous study showed that salt-secreting by salt glands is one of main adaptive strategies of K. caspia under high salinity. However, ROS scavenging, ion homeostasis, and photosynthetic characteristics responses to high salinity remain unclear in K. caspia. Here, physio-biochemical responses and gene expression associated with ROS scavenging and ions transport were tested in K. caspia subjected to 100-400 mM NaCl for 7 days. Results showed that both antioxidant enzymes (SOD, APX) activities and non-enzymatic antioxidants (chlorogenic acid, α-tocopherol, flavonoids, polyamines) contents were significantly enhanced, accompanied by up-regulating the related enzyme and non-enzymatic antioxidant synthesis gene (KcCu/Zn-SOD, KcAPX6, KcHCT, KcHPT1, Kcγ-TMT, KcF3H, KcSAMS and KcSMS) expression with increasing concentrations of NaCl. These responses are beneficial for removing excess ROS to maintain a stable level of H2O2 and O2 - without lipid peroxidation in the K. caspia response to high salt. Meanwhile, up-regulating expression of KcSOS1/2/3, KcNHX1, and KcAVP was linked to Na+ compartmentalization into vacuoles or excretion through salt glands in K. caspia. Notably, salt can improve the function of PSII that facilitate net photosynthetic rates, which is helpful to growing normally in high saline. Overall, the findings suggested that ROS scavenging systems and Na+/K+ transport synergistically contributed to redox equilibrium, ion homeostasis, and the enhancement of PSII function, thereby conferring high salt tolerance.
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Affiliation(s)
- Cui Li
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Luis A.J. Mur
- Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, United Kingdom
- College of Software, Shanxi Agricultural University, Taigu, China
| | - Qinghai Wang
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Xincun Hou
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Chunqiao Zhao
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Zhimin Chen
- College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin, China
| | - Juying Wu
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Qiang Guo
- Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
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Vornoli A, Vizzarri F, Della Croce CM, Grande T, Palazzo M, Árvay J, Pucci L, Gabriele M, Matteucci M, Paolini M, Longo V, Pozzo L. The hypolipidemic, anti-inflammatory and antioxidant effect of Kavolì® aqueous extract, a mixture of Brassica oleracea leaves, in a rat model of NAFLD. Food Chem Toxicol 2022; 167:113261. [PMID: 35787436 DOI: 10.1016/j.fct.2022.113261] [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: 04/22/2022] [Revised: 06/21/2022] [Accepted: 06/23/2022] [Indexed: 11/25/2022]
Abstract
Herein we characterized the bioactive metabolites of the aqueous extract of Kavolì®, a commercial product composed of a mixture of Brassica oleracea leaves, and assessed its potential ameliorating effects in a rat model of non-alcoholic fatty liver disease (NAFLD). Kavolì® extract showed high levels of bioactive compounds and strong in vitro antioxidant activities. Chlorogenic and neochlorogenic acids were identified as the most representative polyphenols. The administration of brassica extract to steatotic rats significantly ameliorated the levels of blood lipids and transaminases, and lipid content and inflammatory markers in liver. Oxidative stress parameters were significantly improved in both liver and brain of steatotic rats. Moreover, plasma and feces levels of short chain fatty acids (SCFAs) were bring back close to control values by Kavolì® treatment, in spite of high fat diet/streptozotocin (HFD/STZ)-induced alterations. The efficacy of Kavolì® in treating hypercholesterolemia, reducing the level of inflammation and cardiovascular disease biomarkers, steatosis and oxidative stress parameters, as well as the ability in modulating SCFAs levels is probably related to the bioactive compounds of the water extract administered to the rat model of NAFLD. In particular, the ameliorating effects are largely attributable to the high content in polyphenols observed in our study.
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Affiliation(s)
- Andrea Vornoli
- Institute of Agricultural Biology and Biotechnology (IBBA), National Research Council (CNR), Pisa Unit, Research Area of Pisa, Via Moruzzi 1, 56124, Pisa, Italy
| | - Francesco Vizzarri
- Department of Agro-Environmental and Territorial Sciences (Disaat), University of Bari, Campus - Via Orabona 4, 70125, Bari, Italy; National Agricultural and Food Centre Nitra, Hlohovecká 2, 95141, Lužianky, Slovak Republic
| | - Clara Maria Della Croce
- Institute of Agricultural Biology and Biotechnology (IBBA), National Research Council (CNR), Pisa Unit, Research Area of Pisa, Via Moruzzi 1, 56124, Pisa, Italy
| | - Teresa Grande
- Institute of Agricultural Biology and Biotechnology (IBBA), National Research Council (CNR), Pisa Unit, Research Area of Pisa, Via Moruzzi 1, 56124, Pisa, Italy
| | - Marisa Palazzo
- Department of Agricultural, Environmental and Food Sciences, University of Molise, Via De Sanctissnc, 86100, Campobasso, Italy
| | - Július Árvay
- Institute of Food Sciences, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra. Tr. A Hlinku 2, 949 76, Nitra, Slovak Republic
| | - Laura Pucci
- Institute of Agricultural Biology and Biotechnology (IBBA), National Research Council (CNR), Pisa Unit, Research Area of Pisa, Via Moruzzi 1, 56124, Pisa, Italy
| | - Morena Gabriele
- Institute of Agricultural Biology and Biotechnology (IBBA), National Research Council (CNR), Pisa Unit, Research Area of Pisa, Via Moruzzi 1, 56124, Pisa, Italy
| | - Marco Matteucci
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà, 33, 56127, Pisa, Italy
| | - Moreno Paolini
- Department of Pharmacology and Biotechnology, Alma Mater Studiorum, University of Bologna, Via Zamboni, 33, 40126, Bologna, Italy
| | - Vincenzo Longo
- Institute of Agricultural Biology and Biotechnology (IBBA), National Research Council (CNR), Pisa Unit, Research Area of Pisa, Via Moruzzi 1, 56124, Pisa, Italy
| | - Luisa Pozzo
- Institute of Agricultural Biology and Biotechnology (IBBA), National Research Council (CNR), Pisa Unit, Research Area of Pisa, Via Moruzzi 1, 56124, Pisa, Italy.
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Mir R, Romero I, González-Orenga S, Ferrer-Gallego PP, Laguna E, Boscaiu M, Oprică L, Grigore MN, Vicente O. Constitutive and Adaptive Traits of Environmental Stress Tolerance in the Threatened Halophyte Limonium angustebracteatum Erben (Plumbaginaceae). PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11091137. [PMID: 35567138 PMCID: PMC9103948 DOI: 10.3390/plants11091137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 04/20/2022] [Accepted: 04/20/2022] [Indexed: 06/01/2023]
Abstract
Limonium angustebracteatum is a halophyte endemic to the E and SE Iberian Peninsula with interest in conservation. Salt glands represent an important adaptive trait in recretohalophytes like this and other Limonium species, as they allow the excretion of excess salts, reducing the concentration of toxic ions in foliar tissues. This study included the analysis of the salt gland structure, composed of 12 cells, 4 secretory and 8 accessory. Several anatomical, physiological and biochemical responses to stress were also analysed in adult plants subjected to one month of water stress, complete lack of irrigation, and salt stress, by watering with aqueous solutions of 200, 400, 600 and 800 mM NaCl. Plant growth was inhibited by the severe water deficit and, to a lesser extent, by high NaCl concentrations. A variation in the anatomical structure of the leaves was detected under conditions of salt and water stress; plants from the salt stress treatment showed salt glands sunken between epidermal cells, bordered by very large epidermal cells, whereas in those from the water stress treatment, the epidermal cells were heterogeneous in shape and size. In both, the palisade structure of the leaves was altered. Salt excretion is usually accompanied by the accumulation of salts in the foliar tissue. This was also found in L. angustebracteatum, in which the concentration of all ions analysed was higher in the leaves than in the roots. The increase of K+ in the roots of plants subjected to water stress was also remarkable. The multivariate analysis indicated differences in water and salt stress responses, such as the accumulation of Na and Cl, or proline, but K+ homeostasis played a relevant role in the mechanism of tolerance to both stressful conditions.
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Affiliation(s)
- Ricardo Mir
- Institute for the Conservation and Improvement of Valencian Agrodiversity (COMAV, UPV), Universitat Politècnica de València, Camino de Vera 14, 46022 Valencia, Spain; (R.M.); (I.R.); (O.V.)
| | - Ignacio Romero
- Institute for the Conservation and Improvement of Valencian Agrodiversity (COMAV, UPV), Universitat Politècnica de València, Camino de Vera 14, 46022 Valencia, Spain; (R.M.); (I.R.); (O.V.)
| | - Sara González-Orenga
- Mediterranean Agroforestry Institute (IAM, UPV), Universitat Politècnica de València, Camino de Vera 14, 46022 Valencia, Spain; (S.G.-O.); (M.B.)
| | - P. Pablo Ferrer-Gallego
- Centre for Forestry Research and Experimentation (CIEF), CIEF-Wildlife Service, Generalitat Valenciana, Avda Comarques del País Valencia, 114, 46930 Quart de Poblet, Valencia, Spain; (P.P.F.-G.); (E.L.)
| | - Emilio Laguna
- Centre for Forestry Research and Experimentation (CIEF), CIEF-Wildlife Service, Generalitat Valenciana, Avda Comarques del País Valencia, 114, 46930 Quart de Poblet, Valencia, Spain; (P.P.F.-G.); (E.L.)
| | - Monica Boscaiu
- Mediterranean Agroforestry Institute (IAM, UPV), Universitat Politècnica de València, Camino de Vera 14, 46022 Valencia, Spain; (S.G.-O.); (M.B.)
| | - Lăcrămioara Oprică
- Faculty of Biology, Alexandru Ioan Cuza University of Iasi, Bulevardul Carol I nr. 11, 700506 Iași, Romania;
| | - Marius-Nicușor Grigore
- Faculty of Medicine and Biological Sciences, “Ștefan cel Mare” University of Suceava, Str. Universității 13, 720229 Suceava, Romania
| | - Oscar Vicente
- Institute for the Conservation and Improvement of Valencian Agrodiversity (COMAV, UPV), Universitat Politècnica de València, Camino de Vera 14, 46022 Valencia, Spain; (R.M.); (I.R.); (O.V.)
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Guo J, Shan C, Zhang Y, Wang X, Tian H, Han G, Zhang Y, Wang B. Mechanisms of Salt Tolerance and Molecular Breeding of Salt-Tolerant Ornamental Plants. FRONTIERS IN PLANT SCIENCE 2022; 13:854116. [PMID: 35574092 PMCID: PMC9093713 DOI: 10.3389/fpls.2022.854116] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 03/30/2022] [Indexed: 05/10/2023]
Abstract
As the area of salinized soils increases, and freshwater becomes more scarcer worldwide, an urgent measure for agricultural production is to use salinized land and conserve freshwater resources. Ornamental flowering plants, such as carnations, roses, chrysanthemums, and gerberas, are found around the world and have high economic, ornamental, ecological, and edible value. It is therefore prudent to improve the salt tolerance of these important horticultural crops. Here, we summarize the salt-adaptive mechanisms, genes, and molecular breeding of ornamental flowering crops. We also review the genome editing technologies that provide us with the means to obtain novel varieties with high salinity tolerance and improved utility value, and discuss future directions of research into ornamental plants like salt exclusion mechanism. We considered that the salt exclusion mechanism in ornamental flowering plants, the acquisition of flowers with high quality and novel color under salinity condition through gene editing techniques should be focused on for the future research.
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Affiliation(s)
- Jianrong Guo
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Science, Shandong Normal University, Ji’nan, China
- *Correspondence: Jianrong Guo,
| | - Changdan Shan
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Science, Shandong Normal University, Ji’nan, China
| | - Yifan Zhang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Science, Shandong Normal University, Ji’nan, China
| | - Xinlei Wang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Science, Shandong Normal University, Ji’nan, China
| | - Huaying Tian
- College of Forestry Engineering, Shandong Agriculture and Engineering University, Ji’nan, China
| | - Guoliang Han
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Science, Shandong Normal University, Ji’nan, China
| | - Yi Zhang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Science, Shandong Normal University, Ji’nan, China
| | - Baoshan Wang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Science, Shandong Normal University, Ji’nan, China
- Baoshan Wang,
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10
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Ben Hsouna A, Ghneim-Herrera T, Ben Romdhane W, Dabbous A, Ben Saad R, Brini F, Abdelly C, Ben Hamed K. Early effects of salt stress on the physiological and oxidative status of the halophyte Lobularia maritima. FUNCTIONAL PLANT BIOLOGY : FPB 2020; 47:912-924. [PMID: 32611480 DOI: 10.1071/fp19303] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 04/18/2020] [Indexed: 05/14/2023]
Abstract
Soil salinity is an abiotic stress that reduces agricultural productivity. For decades, halophytes have been studied to elucidate the physiological and biochemical processes involved in alleviating cellular ionic imbalance and conferring salt tolerance. Recently, several interesting genes with proven influence on salt tolerance were isolated from the Mediterranean halophyte Lobularia maritima (L.) Desv. A better understanding of salt response in this species is needed to exploit its potential as a source of stress-related genes. We report the characterisation of L. maritima's response to increasing NaCl concentrations (100-400 mM) at the physiological, biochemical and molecular levels. L. maritima growth was unaffected by salinity up to 100 mM NaCl and it was able to survive at 400 mM NaCl without exhibiting visual symptoms of damage. Lobularia maritima showed a Na+ and K+ accumulation pattern typical of a salt-includer halophyte, with higher contents of Na+ in the leaves and K+ in the roots of salt-treated plants. The expression profiles of NHX1, SOS1, HKT1, KT1 and VHA-E1 in salt-treated plants matched this Na+ and K+ accumulation pattern, suggesting an important role for these transporters in the regulation of ion homeostasis in leaves and roots of L. maritima. A concomitant stimulation in phenolic biosynthesis and antioxidant enzyme activity was observed under moderate salinity, suggesting a potential link between the production of polyphenolic antioxidants and protection against salt stress in L. maritima. Our findings indicate that the halophyte L. maritima can rapidly develop physiological and antioxidant mechanisms to adapt to salt and manage oxidative stress.
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Affiliation(s)
- Anis Ben Hsouna
- Biotechnology and Plant Improvement Laboratory, Centre of Biotechnology of Sfax, University of Sfax, PO Box 1177, 3018 Sfax, Tunisia; and Departments of Life Sciences, Faculty of Sciences of Gafsa, 2112 Gafsa, Tunisia
| | - Thaura Ghneim-Herrera
- Departamento de Ciencias Biológicas, Universidad Icesi, Calle 18 No. 122-135, Cali, Colombia
| | - Walid Ben Romdhane
- Biotechnology and Plant Improvement Laboratory, Centre of Biotechnology of Sfax, University of Sfax, PO Box 1177, 3018 Sfax, Tunisia; and Plant Production Department, College of Food and Agricultural Sciences, King Saud University, PO Box 2460, 11451 Riyadh, Saudi Arabia
| | - Amira Dabbous
- Laboratory of Extremophile Plants, Center of Biotechnology of Borj Cedria, PO Box 901, 2050 Hammam Lif, Tunisia
| | - Rania Ben Saad
- Biotechnology and Plant Improvement Laboratory, Centre of Biotechnology of Sfax, University of Sfax, PO Box 1177, 3018 Sfax, Tunisia
| | - Faical Brini
- Biotechnology and Plant Improvement Laboratory, Centre of Biotechnology of Sfax, University of Sfax, PO Box 1177, 3018 Sfax, Tunisia
| | - Chedly Abdelly
- Laboratory of Extremophile Plants, Center of Biotechnology of Borj Cedria, PO Box 901, 2050 Hammam Lif, Tunisia
| | - Karim Ben Hamed
- Laboratory of Extremophile Plants, Center of Biotechnology of Borj Cedria, PO Box 901, 2050 Hammam Lif, Tunisia; and Corresponding author.
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11
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Asrar H, Hussain T, Qasim M, Nielsen BL, Gul B, Khan MA. Salt induced modulations in antioxidative defense system of Desmostachya bipinnata. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 147:113-124. [PMID: 31855817 DOI: 10.1016/j.plaphy.2019.12.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 12/09/2019] [Accepted: 12/10/2019] [Indexed: 06/10/2023]
Abstract
This study addressed the interactions between salt stress and the antioxidant responses of a halophytic grass, Desmostachya bipinnata. Plants were grown in a semi-hydroponic system and treated with different NaCl concentrations (0 mM, 100 mM, 400 mM) for a month. ROS degradation enzyme activities were stimulated by addition of NaCl. Synthesis of antioxidant compounds, such as phenols, was enhanced in the presence of NaCl leading to accumulation of these compounds under moderate salinity. However, when the ROS production rate exceeded the capacity of enzyme-controlled degradation, antioxidant compounds were consumed and oxidative damage was indicated by significant levels of hydrogen peroxide at high salinity. The cellular concentration of salicylic acid increased upon salt stress, but since no direct interaction with ROS was detected, a messenger function may be postulated. High salinity treatment caused a significant decrease of plant growth parameters, whereas treatment with moderate salinity resulted in optimal growth. The activity and abundance of superoxide dismutase (SOD) increased with salinity, but the abundance of SOD isoforms was differentially affected, depending on the NaCl concentration applied. Detoxification of hydrogen peroxide (H2O2) was executed by catalase and guaiacol peroxidase at moderate salinity, whereas the enzymes detoxifying H2O2 through the ascorbate/glutathione cycle dominated at high salinity. The redox status of glutathione was impaired at moderate salinity, whereas the levels of both ascorbate and glutathione significantly decreased only at high salinity. Apparently, the maximal activation of enzyme-controlled ROS degradation was insufficient in comparison to the ROS production at high salinity. As a result, ROS-induced damage could not be prevented, if the applied stress exceeded a critical value in D. bipinnata plants.
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Affiliation(s)
- Hina Asrar
- Institute of Sustainable Halophyte Utilization, University of Karachi, Karachi, 75270, Pakistan
| | - Tabassum Hussain
- Institute of Sustainable Halophyte Utilization, University of Karachi, Karachi, 75270, Pakistan
| | - Muhammad Qasim
- Institute of Sustainable Halophyte Utilization, University of Karachi, Karachi, 75270, Pakistan
| | - Brent L Nielsen
- Department of Microbiology and Molecular Biology, Brigham Young University, Provo, UT, 84602, USA
| | - Bilquees Gul
- Institute of Sustainable Halophyte Utilization, University of Karachi, Karachi, 75270, Pakistan.
| | - M Ajmal Khan
- Institute of Sustainable Halophyte Utilization, University of Karachi, Karachi, 75270, Pakistan
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12
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González-Orenga S, Ferrer-Gallego PP, Laguna E, López-Gresa MP, Donat-Torres MP, Verdeguer M, Vicente O, Boscaiu M. Insights on Salt Tolerance of Two Endemic Limonium Species from Spain. Metabolites 2019; 9:E294. [PMID: 31795424 PMCID: PMC6950247 DOI: 10.3390/metabo9120294] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 11/23/2019] [Accepted: 11/27/2019] [Indexed: 11/24/2022] Open
Abstract
We have analysed the salt tolerance of two endemic halophytes of the genus Limonium, with high conservation value. In the present study, seed germination and growth parameters as well as different biomarkers-photosynthetic pigments, mono and divalent ion contents-associated to salt stress were evaluated in response to high levels of NaCl. The study was completed with an untargeted metabolomics analysis of the primary compounds including carbohydrates, phosphoric and organic acids, and amino acids, identified by using a gas chromatography and mass spectrometry platform. Limonium albuferae proved to be more salt-tolerant than L. doufourii, both at the germination stage and during vegetative growth. The degradation of photosynthetic pigments and the increase of Na+/K+ ratio under salt stress were more accentuated in the less tolerant second species. The metabolomics analysis unravelled several differences between the two species. The higher salt tolerance of L. albuferae may rely on its specific accumulation of fructose and glucose under high salinity conditions, the first considered as a major osmolyte in this genus. In addition, L. albuferae showed steady levels of citric and malic acids, whereas the glutamate family pathway was strongly activated under stress in both species, leading to the accumulation of proline (Pro) and γ-aminobutyric acid (GABA).
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Affiliation(s)
- Sara González-Orenga
- Instituto Agroforestal Mediterráneo (IAM), Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain; (S.G.-O.); (M.V.)
| | - P. Pablo Ferrer-Gallego
- Centro para la Investigación y Experimentación Forestal, CIEF-Wildlife Service, Generalitat Valenciana, Avda Comarques del País Valencia,114, 46930 Quart de Poblet, Valencia, Spain; (P.P.F.-G.); (E.L.)
| | - Emilio Laguna
- Centro para la Investigación y Experimentación Forestal, CIEF-Wildlife Service, Generalitat Valenciana, Avda Comarques del País Valencia,114, 46930 Quart de Poblet, Valencia, Spain; (P.P.F.-G.); (E.L.)
| | - M. Pilar López-Gresa
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Universitat Politècnica de València - Consejo Superior de Investigaciones Científicas (CSIC), Camino de Vera s/n, 46022 Valencia, Spain;
| | - Maria P. Donat-Torres
- Instituto de Investigación para la Gestión Integrada de Zonas Costeras. (IGIC), Universidad Politècnica de València. C/ Paranimf 1, 46730 Gandia, Valencia, Spain;
| | - Mercedes Verdeguer
- Instituto Agroforestal Mediterráneo (IAM), Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain; (S.G.-O.); (M.V.)
| | - Oscar Vicente
- Instituto de Conservación y Mejora de la Agrodiversidad Valenciana (COMAV), Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain;
| | - Monica Boscaiu
- Instituto Agroforestal Mediterráneo (IAM), Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain; (S.G.-O.); (M.V.)
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13
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Souid A, Bellani L, Gabriele M, Pucci L, Smaoui A, Abdelly C, Hamed KB, Longo V. Phytochemical and Biological Activities inLimoniumSpecies Collected in Different Biotopes of Tunisia. Chem Biodivers 2019; 16:e1900216. [DOI: 10.1002/cbdv.201900216] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 05/24/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Aymen Souid
- Laboratoire des Plantes ExtrêmophilesCentre de Biotechnologie de Borj Cedria, BP 901 Hammam Lif 2050 Tunisia
- Institute of Agricultural Biology and Biotechnology (IBBA)National Research Council, Pisa Unit, Research Area of Pisa, Via Moruzzi 1 56124 Pisa Italy
| | - Lorenza Bellani
- Institute of Agricultural Biology and Biotechnology (IBBA)National Research Council, Pisa Unit, Research Area of Pisa, Via Moruzzi 1 56124 Pisa Italy
- Department of Life SciencesUniversity of Siena Via A. Moro 2 53100 Siena Italy
| | - Morena Gabriele
- Institute of Agricultural Biology and Biotechnology (IBBA)National Research Council, Pisa Unit, Research Area of Pisa, Via Moruzzi 1 56124 Pisa Italy
| | - Laura Pucci
- Institute of Agricultural Biology and Biotechnology (IBBA)National Research Council, Pisa Unit, Research Area of Pisa, Via Moruzzi 1 56124 Pisa Italy
| | - Abderrazak Smaoui
- Laboratoire des Plantes ExtrêmophilesCentre de Biotechnologie de Borj Cedria, BP 901 Hammam Lif 2050 Tunisia
| | - Chedly Abdelly
- Laboratoire des Plantes ExtrêmophilesCentre de Biotechnologie de Borj Cedria, BP 901 Hammam Lif 2050 Tunisia
| | - Karim Ben Hamed
- Laboratoire des Plantes ExtrêmophilesCentre de Biotechnologie de Borj Cedria, BP 901 Hammam Lif 2050 Tunisia
| | - Vincenzo Longo
- Institute of Agricultural Biology and Biotechnology (IBBA)National Research Council, Pisa Unit, Research Area of Pisa, Via Moruzzi 1 56124 Pisa Italy
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14
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Souid A, Bellani L, Magné C, Zorrig W, Smaoui A, Abdelly C, Longo V, Ben Hamed K. Physiological and antioxidant responses of the sabkha biotope halophyte Limonium delicatulum to seasonal changes in environmental conditions. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 123:180-191. [PMID: 29247938 DOI: 10.1016/j.plaphy.2017.12.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 12/04/2017] [Accepted: 12/04/2017] [Indexed: 06/07/2023]
Abstract
In saline biotopes, different mechanisms may contribute to the tolerance of halophytes to high soil salinity and temperature, drought and other abiotic stresses, but their relative responses and their ecological plasticity for a given species remain unknown. In this study, we examined the responses of the salt marsh halophyte Limonium delicatulum to changing environmental conditions of its natural habitats (Sabkha "El Kalbia", Tunisia). The specific aim of the work was to check whether statistically significant correlations could be established between particular stress response mechanisms (ion uptake, activation of antioxidant systems) and soil parameters and climatic data associated with environmental stress. The results showed that the salinity of the soil increased during the months of June, July and August (dry period), concomitantly with a strong accumulation of salt ions in the aerial parts of the plant. Moreover, the highest antioxidant capacity of this halophyte (enzymes and antioxidant molecules) was reached during the same period of the year. The remaining periods (corresponding to the rainy season) did not show a significant difference in enzymes activities and level of antioxidants, with a minimum observed in the months of January and February. These results show a remarkable effect of salinity in the natural habitat on the activity of enzymes and antioxidant molecules. Other edaphic and climatic factors could also be involved to increase antioxidant capacity, such as nutrient deficiency, temperature and precipitation.
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Affiliation(s)
- Aymen Souid
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia; National Research Council, Institute of Biology and Agricultural Biotechnology (IBBA), Pisa Unit, Research Area of Pisa, Via Moruzzi 1, 56124 Pisa, Italy
| | - Lorenza Bellani
- National Research Council, Institute of Biology and Agricultural Biotechnology (IBBA), Pisa Unit, Research Area of Pisa, Via Moruzzi 1, 56124 Pisa, Italy; Department of Life Sciences, University of Siena, Via A. Moro 2, 53100 Siena, Italy.
| | - Christian Magné
- EA2219 Géoarchitecture, Université de Brest, 6 Avenue Victor Le Gorgeu, CS 93837, 29238 Brest Cedex 3, France
| | - Walid Zorrig
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia
| | - Abderrazak Smaoui
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia
| | - Chedly Abdelly
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia
| | - Vincenzo Longo
- National Research Council, Institute of Biology and Agricultural Biotechnology (IBBA), Pisa Unit, Research Area of Pisa, Via Moruzzi 1, 56124 Pisa, Italy
| | - Karim Ben Hamed
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia
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15
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Al Hassan M, Estrelles E, Soriano P, López-Gresa MP, Bellés JM, Boscaiu M, Vicente O. Unraveling Salt Tolerance Mechanisms in Halophytes: A Comparative Study on Four Mediterranean Limonium Species with Different Geographic Distribution Patterns. FRONTIERS IN PLANT SCIENCE 2017; 8:1438. [PMID: 28861106 PMCID: PMC5562691 DOI: 10.3389/fpls.2017.01438] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Accepted: 08/03/2017] [Indexed: 05/23/2023]
Abstract
We have performed an extensive study on the responses to salt stress in four related Limonium halophytes with different geographic distribution patterns, during seed germination and early vegetative growth. The aims of the work were twofold: to establish the basis for the different chorology of these species, and to identify relevant mechanisms of salt tolerance dependent on the control of ion transport and osmolyte accumulation. Seeds were germinated in vitro, in the presence of increasing NaCl concentrations, and subjected to "recovery of germination" tests; germination percentages and velocity were determined to establish the relative tolerance and competitiveness of the four Limonium taxa. Salt treatments were also applied to young plants, by 1-month irrigation with NaCl up to 800 mM; then, growth parameters, levels of monovalent and divalent ions (in roots and leaves), and leaf contents of photosynthetic pigments and common osmolytes were determined in control and stressed plants of the four species. Seed germination is the most salt-sensitive developmental phase in Limonium. The different germination behavior of the investigated species appears to be responsible for their geographical range size: L. narbonense and L. virgatum, widespread throughout the Mediterranean, are the most tolerant and the most competitive at higher soil salinities; the endemic L. santapolense and L. girardianum are the most sensitive and more competitive only at lower salinities. During early vegetative growth, all taxa showed a strong tolerance to salt stress, although slightly higher in L. virgatum and L. santapolense. Salt tolerance is based on the efficient transport of Na+ and Cl- to the leaves and on the accumulation of fructose and proline for osmotic adjustment. Despite some species-specific quantitative differences, the accumulation patterns of the different ions were similar in all species, not explaining differences in tolerance, except for the apparent activation of K+ transport to the leaves at high external salinity, observed only in the most tolerant L. narbonense and L. virgatum. This specific response may be therefore relevant for salt tolerance in Limonium. The ecological implications of these results, which can contribute to a more efficient management of salt marshes conservation/regeneration programs, are also discussed.
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Affiliation(s)
- Mohamad Al Hassan
- Instituto de Biología Molecular y Celular de Plantas, (UPV-CSIC), Universitat Politècnica de ValènciaValencia, Spain
| | - Elena Estrelles
- Jardín Botánico—ICBiBE, Universitat de ValènciaValencia, Spain
| | - Pilar Soriano
- Jardín Botánico—ICBiBE, Universitat de ValènciaValencia, Spain
| | - María P. López-Gresa
- Instituto de Biología Molecular y Celular de Plantas, (UPV-CSIC), Universitat Politècnica de ValènciaValencia, Spain
| | - José M. Bellés
- Instituto de Biología Molecular y Celular de Plantas, (UPV-CSIC), Universitat Politècnica de ValènciaValencia, Spain
| | - Monica Boscaiu
- Instituto Agroforestal Mediterráneo, Universitat Politècnica de ValènciaValencia, Spain
| | - Oscar Vicente
- Instituto de Biología Molecular y Celular de Plantas, (UPV-CSIC), Universitat Politècnica de ValènciaValencia, Spain
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16
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Gémes K, Mellidou Ι, Karamanoli K, Beris D, Park KY, Matsi T, Haralampidis K, Constantinidou HI, Roubelakis-Angelakis KA. Deregulation of apoplastic polyamine oxidase affects development and salt response of tobacco plants. JOURNAL OF PLANT PHYSIOLOGY 2017; 211:1-12. [PMID: 28135604 DOI: 10.1016/j.jplph.2016.12.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Revised: 12/15/2016] [Accepted: 12/19/2016] [Indexed: 05/02/2023]
Abstract
Polyamine (PA) homeostasis is associated with plant development, growth and responses to biotic/abiotic stresses. Apoplastic PA oxidase (PAO) catalyzes the oxidation of PAs contributing to cellular homeostasis of reactive oxygen species (ROS) and PAs. In tobacco, PAs decrease with plant age, while apoplastic PAO activity increases. Our previous results with young transgenic tobacco plants with enhanced/reduced apoplastic PAO activity (S-ZmPAO/AS-ZmPAO, respectively) established the importance of apoplastic PAO in controlling tolerance to short-term salt stress. However, it remains unclear if the apoplastic PAO pathway is important for salt tolerance at later stages of plant development. In this work, we examined whether apoplastic PAO controls also plant development and tolerance of adult plants during long-term salt stress. The AS-ZmPAO plants contained higher Ca2+ during salt stress, showing also reduced chlorophyll content index (CCI), leaf area and biomass but taller phenotype compared to the wild-type plants during salt. On the contrary, the S-ZmPAO had more leaves with slightly greater size compared to the AS-ZmPAO and higher antioxidant genes/enzyme activities. Accumulation of proline in the roots was evident at prolonged stress and correlated negatively with PAO deregulation as did the transcripts of genes mediating ethylene biosynthesis. In contrast to the strong effect of apoplastic PAO to salt tolerance in young plants described previously, the effect it exerts at later stages of development is rather moderate. However, the different phenotypes observed in plants deregulating PAO reinforce the view that apoplastic PAO exerts multifaceted roles on plant growth and stress responses. Our data suggest that deregulation of the apoplastic PAO can be further examined as a potential approach to breed plants with enhanced/reduced tolerance to abiotic stress with minimal associated trade-offs.
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Affiliation(s)
- Katalin Gémes
- Department of Biology, University of Crete, Voutes University Campus, 70013 Heraklion, Greece; Biological Research Centre, Hungarian Academy of Sciences, H-6726 Szeged, Temesvari krt. 62, Hungary
| | | | | | - Despoina Beris
- Department of Biology, National and Kapodistrian University of Athens, Greece
| | - Ky Young Park
- Department of Biology, Sunchon National University, 57922 Chonnam, South Korea
| | - Theodora Matsi
- School of Agriculture, Aristotle University, 54124 Thessaloniki, Greece
| | - Kosmas Haralampidis
- Department of Biology, National and Kapodistrian University of Athens, Greece
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17
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Dassanayake M, Larkin JC. Making Plants Break a Sweat: the Structure, Function, and Evolution of Plant Salt Glands. FRONTIERS IN PLANT SCIENCE 2017; 8:406. [PMID: 28400779 PMCID: PMC5368257 DOI: 10.3389/fpls.2017.00406] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 03/09/2017] [Indexed: 05/25/2023]
Abstract
Salt stress is a complex trait that poses a grand challenge in developing new crops better adapted to saline environments. Some plants, called recretohalophytes, that have naturally evolved to secrete excess salts through salt glands, offer an underexplored genetic resource for examining how plant development, anatomy, and physiology integrate to prevent excess salt from building up to toxic levels in plant tissue. In this review we examine the structure and evolution of salt glands, salt gland-specific gene expression, and the possibility that all salt glands have originated via evolutionary modifications of trichomes. Salt secretion via salt glands is found in more than 50 species in 14 angiosperm families distributed in caryophyllales, asterids, rosids, and grasses. The salt glands of these distantly related clades can be grouped into four structural classes. Although salt glands appear to have originated independently at least 12 times, they share convergently evolved features that facilitate salt compartmentalization and excretion. We review the structural diversity and evolution of salt glands, major transporters and proteins associated with salt transport and secretion in halophytes, salt gland relevant gene expression regulation, and the prospect for using new genomic and transcriptomic tools in combination with information from model organisms to better understand how salt glands contribute to salt tolerance. Finally, we consider the prospects for using this knowledge to engineer salt glands to increase salt tolerance in model species, and ultimately in crops.
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Affiliation(s)
- Maheshi Dassanayake
- Department of Biological Sciences, Louisiana State University, Baton RougeLA, USA
| | - John C. Larkin
- Department of Biological Sciences, Louisiana State University, Baton RougeLA, USA
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18
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Barak S, Farrant JM. Extremophyte adaptations to salt and water deficit stress. FUNCTIONAL PLANT BIOLOGY : FPB 2016; 43:v-x. [PMID: 32480487 DOI: 10.1071/fpv43n7_fo] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Plants that can survive and even thrive in extreme environments (extremophytes) are likely treasure boxes of plant adaptations to environmental stresses. These species represent excellent models for understanding mechanisms of stress tolerance that may not be present in stress-sensitive species, as well as for identifying genetic determinants to develop stress-tolerant crops. This special issue of Functional Plant Biology focuses on physiological and molecular processes that enable extremophytes to naturally survive high levels of salt or desiccation.
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Affiliation(s)
- Simon Barak
- French Associates Institute for Agriculture and Biotechnology of Drylands, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion, 8499000, Israel
| | - Jill M Farrant
- Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, Rondebosch, 7701, South Africa
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