Gong, Wen and Oubounyt, Mhaned and Baumbach, Jan and Dresselhaus, Thomas (2024) Heat-stress-induced ROS in maize silks cause late pollen tube growth arrest and sterility. ISCIENCE, 27 (7): 110081. ISSN 2589-0042
Full text not available from this repository. (Request a copy)Abstract
The reproductive phase of plants is highly sensitive to ambient temperature stresses. To investigate sensitivity of female reproductive organs in grass crops during the pollination phase, we exposed the elongated stigma (silk) of maize to ambient environment at the silking stage. Moderate heat stress causes cell death of silk hair cells but did not affect early pollen tube growth inside the silk. Late pollen tube growth arrest was observed, leading to sterility. Heat stress causes elevated levels of reactive oxygen species (ROS) in silks, whose levels can be reduced by scavengers partly restoring pollen tube growth and fertility. A number of biological processes including hydrogen peroxide catabolic processes and bHLH transcription factor genes are downregulated by heat stress, while some NAC transcription factor genes are strongly upregulated. In conclusion, this study now provides a basis to select genes for engineering heat -stress -tolerant grass crops during the pollination phase.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HYPERSENSITIVE RESPONSE; TRANSCRIPTION FACTOR; SPRING MAIZE; TOLERANCE; FERTILIZATION; GUIDANCE; CLIMATE; PROTEIN; INCOMPATIBILITY; LOCALIZATION |
| Subjects: | 500 Science > 580 Botanical sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften > Lehrstuhl für Zellbiologie und Pflanzenphysiologie (Prof. Dr. Klaus Grasser) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Jan 2026 07:58 |
| Last Modified: | 14 Jan 2026 07:58 |
| URI: | https://pred.uni-regensburg.de/id/eprint/63950 |
Actions (login required)
 |
View Item |
