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Assessment of Drought Tolerance of Miscanthus Genotypes through Dry-Down Treatment and Fixed-Soil-Moisture-Content Techniques
| Title: | Assessment of Drought Tolerance of Miscanthus Genotypes through Dry-Down Treatment and Fixed-Soil-Moisture-Content Techniques |
| Authors: | Weng, Tzu-Ya Browse this author | | Nakashima, Taiken Browse this author →KAKEN DB | | Villanueva-Morales, Antonio Browse this author | | Stewart, J. Ryan Browse this author | | Sacks, Erik J. Browse this author | | Yamada, Toshihiko Browse this author →KAKEN DB |
| Keywords: | Miscanthus spp | | drought tolerance | | photosynthetic parameters | | bioenergy crops | | automated irrigation control |
| Issue Date: | 22-Dec-2021 |
| Publisher: | MDPI |
| Journal Title: | Agriculture |
| Volume: | 12 |
| Issue: | 1 |
| Start Page: | 6 |
| Publisher DOI: | 10.3390/agriculture12010006 |
| Abstract: | Miscanthus, a high-yielding, warm-season C-4 grass, shows promise as a potential bioenergy crop in temperate regions. However, drought may restrain productivity of most genotypes. In this study, total 29 Miscanthus genotypes of East-Asian origin were screened for drought tolerance with two methods, a dry-down treatment in two locations and a system where soil moisture content (SMC) was maintained at fixed levels using an automatic irrigation system in one location. One genotype, Miscanthus sinensis PMS-285, showed relatively high drought-tolerance capacity under moderate drought stress. Miscanthus sinensis PMS-285, aligned with the M. sinensis 'Yangtze-Qinling' genetic cluster, had relatively high principal component analysis ranking values in both two locations experiments, Hokkaido University and Brigham Young University. Genotypes derived from the 'Yangtze-Qinling' genetic cluster showed relatively greater photosynthetic performance than other genetic clusters, suggesting germplasm from this group could be a potential source of drought-tolerant plant material. Diploid genotypes showed stronger drought tolerance than tetraploid genotypes, suggesting ploidy could be an influential factor for this trait. Of the two methods, the dry-down treatment appears more suitable for selecting drought-tolerant genotypes given that it reflects water-stress conditions in the field. However, the fixed-SMC experiment may be good for understanding the physiological responses of plants to relatively constant water-stress levels. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/84847 |
| Appears in Collections: | 北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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