ZmD11 Gene Regulates Tobacco Plant Floral Development under Drought Stress
Chang, Xianmin (2024) ZmD11 Gene Regulates Tobacco Plant Floral Development under Drought Stress. Agronomy, 14 (7). pp. 1-12. ISSN 2073-4395
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Abstract
Maize is most sensitive to drought stress at the floral stage by reducing tassel and silk quality, and thus improving drought tolerance at this stage may help preserve yield. It has been reported that BRs (brassinosteroids) promote floral development under drought stress. However, the function of the brassinosteroid biosynthesis gene ZmDWARF11 (ZmD11) on floral growth under drought stress has not been elucidated. This study found that under normal growth conditions, the heterologous over-expression of ZmD11 significantly enhanced both the vegetative growth and floral develop-ment of tobacco. Under drought stress, overexpressing ZmD11 reduced stress-induced tobacco flower size reduction, while it did not affect vegetative growth. After drought treatment, the activ-ities of protective enzymes, including CAT (Catalase), SOD (Superoxide Dismutase), and POD (Peroxidase), were higher, while the content of MDA (Malondialdehyde) was lower in ZmD11 over-expression tobacco lines than that in the wild type control. The relative expression of dehy-drin-related genes NtLeat5 and NtERD10 was increased in ZmD11 over-expression tobacco lines compared to that in the control. In summary, we reported that ZmD11 plays a role in tobacco floral development under drought stress. Our data are valuable in understanding the functions of BRs in regulating plant floral development under drought stress.
| Item Type: | Article |
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| Keywords: | maize, ZmD11, brassinosteroids, floral development |
| Divisions: | Agriculture, Science and Practice |
| Depositing User: | Professor Xianmin Chang |
| Date Deposited: | 01 Jul 2024 11:39 |
| Last Modified: | 01 Jul 2024 11:39 |
| URI: | https://rau.repository.guildhe.ac.uk/id/eprint/16768 |
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