Leaf gas film retention during submergence of 14 cultivars of wheat (Triticum aestivum)
| Autor: | Dennis Konnerup, Ole Pedersen, Anders Winkel, Max Herzog |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine ved/biology Glyceria fluitans ved/biology.organism_classification_rank.species Plant Science Biology biology.organism_classification 01 natural sciences Epicuticular wax 03 medical and health sciences 030104 developmental biology Agronomy Terrestrial plant Wetting Cultivar Selection criterion Agronomy and Crop Science Retention time 010606 plant biology & botany |
| Zdroj: | Functional plant biology : FPB. 44(9) |
| ISSN: | 1445-4416 |
| Popis: | Flooding of fields after sudden rainfall events can result in crops being completely submerged. Some terrestrial plants, including wheat (Triticum aestivum L.), possess superhydrophobic leaf surfaces that retain a thin gas film when submerged, and the gas films enhance gas exchange with the floodwater. However, the leaves lose their hydrophobicity during submergence, and the gas films subsequently disappear. We tested gas film retention time of 14 different wheat cultivars and found that wheat could retain the gas films for a minimum of 2 days, whereas the wild wetland grass Glyceria fluitans (L.) R.Br. had thicker gas films and could retain its gas films for a minimum of 4 days. Scanning electron microscopy showed that the wheat cultivars and G. fluitans possessed high densities of epicuticular wax platelets, which could explain their superhydrophobicity. However, G. fluitans also had papillae that contributed to higher hydrophobicity during the initial submergence and could explain why G. fluitans retained gas films for a longer period of time. The loss of gas films was associated with the leaves being covered by an unidentified substance. We suggest that leaf gas film is a relevant trait to use as a selection criterion to improve the flood tolerance of crops that become temporarily submerged. |
| Databáze: | OpenAIRE |
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