Genotypic Variation for Salt Tolerance within and between ‘Alamo’ and ‘Kanlow’ Switchgrass (<i>Panicum virgatum</i> L.) Cultivars
Switchgrass tolerates nutrient and water limitations; however, high salt concentrations may inhibit its production. Therefore, the salt tolerance potential of switchgrass needs to be enhanced for economic production. The objective of this study was to determine the differences within and between two...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/12/4/973 |
| _version_ | 1797437271886004224 |
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| author | Surya L. Shrestha Carl Sams Fred Allen |
| author_facet | Surya L. Shrestha Carl Sams Fred Allen |
| author_sort | Surya L. Shrestha |
| collection | DOAJ |
| description | Switchgrass tolerates nutrient and water limitations; however, high salt concentrations may inhibit its production. Therefore, the salt tolerance potential of switchgrass needs to be enhanced for economic production. The objective of this study was to determine the differences within and between two lowland cultivars of switchgrass for growth, stomatal morphology, photosynthetic pigments content, and mineral traits. A greenhouse study was conducted on 18 sublines, derived from the cultivars Alamo (A) and Kanlow (K), plus a salt-tolerant and sensitivity check (20 genotypes). A split-plot randomized complete block design was used with three replications per treatment (0, 5, 10, and 20 dS m<sup>−1</sup> NaCl). High salt concentrations (10 and 20 dS m<sup>−1</sup> NaCl) reduced shoot biomass, stem diameter, and plant height up to 21, 11, and 16%, respectively, compared to the control for all genotypes (<i>p</i> < 0.05). Chlorophyll a and adaxial stomata width were moderately correlated with growth traits under saline conditions (<i>r</i> = 0.49 to 0.56, <i>p</i> < 0.05). The sublines 12A-227, TN13006-04, 12A-259, 12K-247, and TN13009-08 had better growth and accumulated less salt in shoot biomass than both checks. These results indicate that differences exist within and between the Alamo and Kanlow sublines, and it is possible to breed improved cultivars with increased salt tolerance. |
| first_indexed | 2024-03-09T11:16:29Z |
| format | Article |
| id | doaj.art-ffbd4abf2c69405196c9f72b8e1156a9 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-09T11:16:29Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-ffbd4abf2c69405196c9f72b8e1156a92023-12-01T00:29:41ZengMDPI AGAgronomy2073-43952022-04-0112497310.3390/agronomy12040973Genotypic Variation for Salt Tolerance within and between ‘Alamo’ and ‘Kanlow’ Switchgrass (<i>Panicum virgatum</i> L.) CultivarsSurya L. Shrestha0Carl Sams1Fred Allen2112 Plant Biotechnology Building, Department of Plant Sciences, University of Tennessee, Knoxville, TN 37996-4500, USA112 Plant Biotechnology Building, Department of Plant Sciences, University of Tennessee, Knoxville, TN 37996-4500, USA112 Plant Biotechnology Building, Department of Plant Sciences, University of Tennessee, Knoxville, TN 37996-4500, USASwitchgrass tolerates nutrient and water limitations; however, high salt concentrations may inhibit its production. Therefore, the salt tolerance potential of switchgrass needs to be enhanced for economic production. The objective of this study was to determine the differences within and between two lowland cultivars of switchgrass for growth, stomatal morphology, photosynthetic pigments content, and mineral traits. A greenhouse study was conducted on 18 sublines, derived from the cultivars Alamo (A) and Kanlow (K), plus a salt-tolerant and sensitivity check (20 genotypes). A split-plot randomized complete block design was used with three replications per treatment (0, 5, 10, and 20 dS m<sup>−1</sup> NaCl). High salt concentrations (10 and 20 dS m<sup>−1</sup> NaCl) reduced shoot biomass, stem diameter, and plant height up to 21, 11, and 16%, respectively, compared to the control for all genotypes (<i>p</i> < 0.05). Chlorophyll a and adaxial stomata width were moderately correlated with growth traits under saline conditions (<i>r</i> = 0.49 to 0.56, <i>p</i> < 0.05). The sublines 12A-227, TN13006-04, 12A-259, 12K-247, and TN13009-08 had better growth and accumulated less salt in shoot biomass than both checks. These results indicate that differences exist within and between the Alamo and Kanlow sublines, and it is possible to breed improved cultivars with increased salt tolerance.https://www.mdpi.com/2073-4395/12/4/973biomass yieldcarotenoidchlorophyllgenotype and salt treatment interactionratio of shoot and root biomasssalt tolerance |
| spellingShingle | Surya L. Shrestha Carl Sams Fred Allen Genotypic Variation for Salt Tolerance within and between ‘Alamo’ and ‘Kanlow’ Switchgrass (<i>Panicum virgatum</i> L.) Cultivars Agronomy biomass yield carotenoid chlorophyll genotype and salt treatment interaction ratio of shoot and root biomass salt tolerance |
| title | Genotypic Variation for Salt Tolerance within and between ‘Alamo’ and ‘Kanlow’ Switchgrass (<i>Panicum virgatum</i> L.) Cultivars |
| title_full | Genotypic Variation for Salt Tolerance within and between ‘Alamo’ and ‘Kanlow’ Switchgrass (<i>Panicum virgatum</i> L.) Cultivars |
| title_fullStr | Genotypic Variation for Salt Tolerance within and between ‘Alamo’ and ‘Kanlow’ Switchgrass (<i>Panicum virgatum</i> L.) Cultivars |
| title_full_unstemmed | Genotypic Variation for Salt Tolerance within and between ‘Alamo’ and ‘Kanlow’ Switchgrass (<i>Panicum virgatum</i> L.) Cultivars |
| title_short | Genotypic Variation for Salt Tolerance within and between ‘Alamo’ and ‘Kanlow’ Switchgrass (<i>Panicum virgatum</i> L.) Cultivars |
| title_sort | genotypic variation for salt tolerance within and between alamo and kanlow switchgrass i panicum virgatum i l cultivars |
| topic | biomass yield carotenoid chlorophyll genotype and salt treatment interaction ratio of shoot and root biomass salt tolerance |
| url | https://www.mdpi.com/2073-4395/12/4/973 |
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