| Autor: |
S. El-Kady, A. Solt, Gábor Somlyai, Mária Hevesi, Z. Klement, C. Kari |
| Rok vydání: |
1988 |
| Předmět: |
|
| Zdroj: |
Physiological and Molecular Plant Pathology. 33:473-482 |
| ISSN: |
0885-5765 |
| DOI: |
10.1016/0885-5765(88)90012-4 |
| Popis: |
Pseudomonas syringae pathovars were starved to deplete amino acids in the absence (starved) or in the presence of chloramphenicol (starved + Cm). When amino acids were replaced (after 3, 30 and 60 min of starvation) the starved culture resumed growth in vitro immediately, whereas the starved + Cm culture started to grow only after a lag period. This phenomenon was exploited to study the possible relationship between the induction of the hypersensitive reaction (HR) in plant leaves and the growth rate of the bacteria. It was found that in an incompatible host-parasite system the induction of HR was delayed, in the case of starved + Cm treated bacteria, by the same period of time as the length of the lag period found in vitro, and that for an efficient HR induction the bacterial growth rate must exceed a certain threshold value. In a compatible host-parasite system the induction of the HR-type necrosis induced by the starved + Cm treated bacteria was delayed beyond the length of the lag period found in vitro. From these results we can conclude that a correlation exists between the capability of the bacteria for growth and the kinetics of HR induction. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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