Abstract
By employment of differential scanning calorimetry and Wilhelmy tensiometry it was found that methyl jasmonate (MJ) increases fluidity of dipalmitoylphosphatidylcholine, which is a specific stomatal guard cell membrane component. In a transpiration study carried out on wheat (Triticum aestivum cv. Barkai) seedlings it was found that the transpiration reducing effect of MJ was not impaired by UV irradiation at a dosage that inactivates abscisic acid. Furthermore, a NMR study comparing UV irradiated and non-irradiated MJ produced essentially identical profiles. Results are discussed in the light of a hypothesis of a surface tension-related MJ effect that facilitates response of stomatal guard cells when subjected to water stress.
| Original language | English |
|---|---|
| Pages (from-to) | 691-695 |
| Number of pages | 5 |
| Journal | Journal of Plant Physiology |
| Volume | 144 |
| Issue number | 6 |
| DOIs | |
| State | Published - 1994 |
Keywords
- 4-2(hydroxyethyl)-1-piperazine ethane-sulfonic acid
- DPPC
- DSC
- Differential Scanning Calorimetry
- FTIR
- Fluidity
- Fourier transform infra-red spectroscopy
- HEPES
- LOX
- MJ
- PC
- PL
- PUFA
- TRIS
- Tm
- Triticum aestivum
- UV irradiation
- dipalmitoylphosphatidylcholine
- lipoxygenase
- methyl jasmonate
- methyl jasmonate
- phosphatidylcholine
- phospholipid
- polyunsaturated fatty acids
- surface tension
- transition temperature
- transpiration
- tris(hydroxymethyl)aminoethane