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Custódio L, Charles G, Magné C, Barba-Espín G, Piqueras A, Hernández JA, Ben Hamed K, Castañeda-Loaiza V, Fernandes E, Rodrigues MJ. Application of In Vitro Plant Tissue Culture Techniques to Halophyte Species: A Review. Plants (Basel) 2022; 12:126. [PMID: 36616255 PMCID: PMC9824063 DOI: 10.3390/plants12010126] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 12/16/2022] [Accepted: 12/23/2022] [Indexed: 06/17/2023]
Abstract
Halophytes are plants able to thrive in environments characterized by severe abiotic conditions, including high salinity and high light intensity, drought/flooding, and temperature fluctuations. Several species have ethnomedicinal uses, and some are currently explored as sources of food and cosmetic ingredients. Halophytes are considered important alternative cash crops to be used in sustainable saline production systems, due to their ability to grow in saline conditions where conventional glycophyte crops cannot, such as salt-affected soils and saline irrigation water. In vitro plant tissue culture (PTC) techniques have greatly contributed to industry and agriculture in the last century by exploiting the economic potential of several commercial crop plants. The application of PTC to selected halophyte species can thus contribute for developing innovative production systems and obtaining halophyte-based bioactive products. This work aimed to put together and review for the first time the most relevant information on the application of PTC to halophytes. Several protocols were established for the micropropagation of different species. Various explant types have been used as starting materials (e.g., basal shoots and nodes, cotyledons, epicotyls, inflorescence, internodal segments, leaves, roots, rhizomes, stems, shoot tips, or zygotic embryos), involving different micropropagation techniques (e.g., node culture, direct or indirect shoot neoformation, caulogenesis, somatic embryogenesis, rooting, acclimatization, germplasm conservation and cryopreservation, and callogenesis and cell suspension cultures). In vitro systems were also used to study physiological, biochemical, and molecular processes in halophytes, such as functional and salt-tolerance studies. Thus, the application of PTC to halophytes may be used to improve their controlled multiplication and the selection of desired traits for the in vitro production of plants enriched in nutritional and functional components, as well as for the study of their resistance to salt stress.
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Affiliation(s)
- Luísa Custódio
- Centre of Marine Sciences, Faculty of Sciences and Technology, University of Algarve, Ed. 7, Campus of Gambelas, 8005-139 Faro, Portugal
| | - Gilbert Charles
- Géoarchitecture Territoires, Urbanisation, Biodiversité, Environnement, Faculty of Sciences and Techniques, University of Western Brittany, 6 av. V. Le Gorgeu, CS 93837, CEDEX 3, 29238 Brest, France
| | - Christian Magné
- Géoarchitecture Territoires, Urbanisation, Biodiversité, Environnement, Faculty of Sciences and Techniques, University of Western Brittany, 6 av. V. Le Gorgeu, CS 93837, CEDEX 3, 29238 Brest, France
| | - Gregorio Barba-Espín
- Group of Fruit Trees Biotechnology, Department of Plant Breeding, CEBAS, CSIC, Campus Universitario de Espinardo, 30100 Murcia, Spain
| | - Abel Piqueras
- Group of Fruit Trees Biotechnology, Department of Plant Breeding, CEBAS, CSIC, Campus Universitario de Espinardo, 30100 Murcia, Spain
| | - José A. Hernández
- Group of Fruit Trees Biotechnology, Department of Plant Breeding, CEBAS, CSIC, Campus Universitario de Espinardo, 30100 Murcia, Spain
| | - Karim Ben Hamed
- Centre of Biotechnology of Borj Cedria, Laboratory of Extremophile Plants, BP 95, Hammam-Lif 2050, Tunisia
| | - Viana Castañeda-Loaiza
- Centre of Marine Sciences, Faculty of Sciences and Technology, University of Algarve, Ed. 7, Campus of Gambelas, 8005-139 Faro, Portugal
| | - Eliana Fernandes
- Centre of Marine Sciences, Faculty of Sciences and Technology, University of Algarve, Ed. 7, Campus of Gambelas, 8005-139 Faro, Portugal
| | - Maria João Rodrigues
- Centre of Marine Sciences, Faculty of Sciences and Technology, University of Algarve, Ed. 7, Campus of Gambelas, 8005-139 Faro, Portugal
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Bamel K, Gupta R, Gupta SC. Acetylcholine suppresses shoot formation and callusing in leaf explants of in vitro raised seedlings of tomato, Lycopersicon esculentum Miller var. Pusa Ruby. Plant Signal Behav 2016; 11:e1187355. [PMID: 27348536 PMCID: PMC4973771 DOI: 10.1080/15592324.2016.1187355] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 05/01/2016] [Accepted: 05/02/2016] [Indexed: 06/01/2023]
Abstract
We present experimental evidence to show that acetylcholine (ACh) causes decrease in shoot formation in leaf explants of tomato (Lycopersicon esculentum Miller var Pusa Ruby) when cultured on shoot regeneration medium. The optimum response was obtained at 10(-4) M ACh-enriched medium. ACh also causes decrease in percentage of cultures forming callus and reduces the callus mass. Inhibitors of enzymatic hydrolysis of ACh, neostigmine and physostigmine, also suppresses callogenesis and caulogenesis. On the other hand, the breakdown products of Ach, choline and acetate, do not alter the morphogenic response induced on the shoot regeneration medium. Neostigmine showed optimal reduction in shoot formation at 10(-5) M. The explants cultured on neostigmine augmented medium showed decline in the activity of ACh hydrolyzing enzyme acetylcholinesterase. ACh and neostigmine added together showed marked reduction in callus mass. These results strongly support the role of ACh as a natural regulator of morphogenesis in tomato plants.
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Affiliation(s)
- Kiran Bamel
- Department of Botany, University of Delhi, Delhi, India
- Department of Botany, Shivaji College (University of Delhi), Raja Garden, Delhi, India
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