Response of pearl millet (Pennisetum glaucum [L.] R. Br.) growth to post-emergence water stress
Pearl millet is primarily grown under rainfed conditions in Sub-Saharan Africa. Early droughts are prevalent in the Sahel region, where pearl millet is widely cultivated, and they severely impact pearl millet growth and productivity by affecting plant stand and reducing plant density in the field. C...
| Autores principales: | , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
MDPI
2025
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/179160 |
| _version_ | 1855538426624868352 |
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| author | Bazie, Lazare Vourbouè Drabo, Inoussa Some, Koussao Rouamba, Armel Bationo, Pauline |
| author_browse | Bationo, Pauline Bazie, Lazare Vourbouè Drabo, Inoussa Rouamba, Armel Some, Koussao |
| author_facet | Bazie, Lazare Vourbouè Drabo, Inoussa Some, Koussao Rouamba, Armel Bationo, Pauline |
| author_sort | Bazie, Lazare Vourbouè |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Pearl millet is primarily grown under rainfed conditions in Sub-Saharan Africa. Early droughts are prevalent in the Sahel region, where pearl millet is widely cultivated, and they severely impact pearl millet growth and productivity by affecting plant stand and reducing plant density in the field. Consequently, genetic improvement for early drought tolerance is a promising strategy to enhance productivity in these regions. This study aims to identify pearl millet lines that are tolerant to water stress at the seedling stage by assessing various water-stress-tolerance traits. Two hundred pearl millet inbred lines were screened for drought tolerance by inducing water stress with polyethylene glycol 6000 (PEG 6000) in the laboratory. The experiment was repeated in the greenhouse using pot screening. The experimental design was an alpha lattice with 10 entries × 20 blocks in two replications. Four treatments (0 g/L, 115 g/L, 235 g/L, 289 g/L) were applied in the laboratory: one control and three concentrations of PEG 6000. Control and stress were applied in the greenhouse. Data were collected on germination rate and growth parameters, including root and seedling length, leaf length and width, and chlorophyll content. Results revealed significant differences among the pearl millet inbred lines under both drought and well-watered conditions. The inbred lines IP-16403 and IP-18062 were the most tolerant in both the greenhouse and laboratory. Water stress significantly reduced plant growth, although an increase in root length was observed in some lines. The number of days to 50% emergence was positively and strongly correlated with survival time (+0.45), while leaf width was negatively correlated with survival time (−0.29) and water stress tolerance (−0.37). The drought-tolerant and drought-susceptible pearl millet inbred lines identified in this study provide valuable genetic resources for enhancing pearl millet productivity in arid and semi-arid environments, especially in the face of unpredictable climate variability. |
| format | Journal Article |
| id | CGSpace179160 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | CGSpace1791602025-12-22T02:15:30Z Response of pearl millet (Pennisetum glaucum [L.] R. Br.) growth to post-emergence water stress Bazie, Lazare Vourbouè Drabo, Inoussa Some, Koussao Rouamba, Armel Bationo, Pauline inbred lines polyethylene glycols drought stress drought tolerance seedlings pearl millet Pearl millet is primarily grown under rainfed conditions in Sub-Saharan Africa. Early droughts are prevalent in the Sahel region, where pearl millet is widely cultivated, and they severely impact pearl millet growth and productivity by affecting plant stand and reducing plant density in the field. Consequently, genetic improvement for early drought tolerance is a promising strategy to enhance productivity in these regions. This study aims to identify pearl millet lines that are tolerant to water stress at the seedling stage by assessing various water-stress-tolerance traits. Two hundred pearl millet inbred lines were screened for drought tolerance by inducing water stress with polyethylene glycol 6000 (PEG 6000) in the laboratory. The experiment was repeated in the greenhouse using pot screening. The experimental design was an alpha lattice with 10 entries × 20 blocks in two replications. Four treatments (0 g/L, 115 g/L, 235 g/L, 289 g/L) were applied in the laboratory: one control and three concentrations of PEG 6000. Control and stress were applied in the greenhouse. Data were collected on germination rate and growth parameters, including root and seedling length, leaf length and width, and chlorophyll content. Results revealed significant differences among the pearl millet inbred lines under both drought and well-watered conditions. The inbred lines IP-16403 and IP-18062 were the most tolerant in both the greenhouse and laboratory. Water stress significantly reduced plant growth, although an increase in root length was observed in some lines. The number of days to 50% emergence was positively and strongly correlated with survival time (+0.45), while leaf width was negatively correlated with survival time (−0.29) and water stress tolerance (−0.37). The drought-tolerant and drought-susceptible pearl millet inbred lines identified in this study provide valuable genetic resources for enhancing pearl millet productivity in arid and semi-arid environments, especially in the face of unpredictable climate variability. 2025-10 2025-12-21T23:14:41Z 2025-12-21T23:14:41Z Journal Article https://hdl.handle.net/10568/179160 en Open Access application/pdf MDPI Bazie, L. V., Drabo, I., Some, K., Rouamba, A., & Bationo, P. (2025). Response of pearl millet (Pennisetum glaucum [L.] R. Br.) growth to post-emergence water stress. Agronomy, 15(10), 2321. https://doi.org/10.3390/agronomy15102321 |
| spellingShingle | inbred lines polyethylene glycols drought stress drought tolerance seedlings pearl millet Bazie, Lazare Vourbouè Drabo, Inoussa Some, Koussao Rouamba, Armel Bationo, Pauline Response of pearl millet (Pennisetum glaucum [L.] R. Br.) growth to post-emergence water stress |
| title | Response of pearl millet (Pennisetum glaucum [L.] R. Br.) growth to post-emergence water stress |
| title_full | Response of pearl millet (Pennisetum glaucum [L.] R. Br.) growth to post-emergence water stress |
| title_fullStr | Response of pearl millet (Pennisetum glaucum [L.] R. Br.) growth to post-emergence water stress |
| title_full_unstemmed | Response of pearl millet (Pennisetum glaucum [L.] R. Br.) growth to post-emergence water stress |
| title_short | Response of pearl millet (Pennisetum glaucum [L.] R. Br.) growth to post-emergence water stress |
| title_sort | response of pearl millet pennisetum glaucum l r br growth to post emergence water stress |
| topic | inbred lines polyethylene glycols drought stress drought tolerance seedlings pearl millet |
| url | https://hdl.handle.net/10568/179160 |
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