NON-PARASITIC DISORDERS IN HYACINTHS CAUSED BY A HIGH-TEMPERATURE TREATMENT TO CONTROL YELLOW DISEASE (XANTHOMONAS CAMPESTRIS PV. HYACINTHI), AND THE ANALYSIS OF GASEOUS EMANATIONS FROM THE BULBS.

The production of CO₂ by hyacinth bulbs cvs ‘L’Innocence’ and ‘Pink Pearl’ has been recorded during a high-temperature treatment (HTT) of 2 weeks 38 plus 3 days 44°C preceded and followed by storage at 30°C. As a result of the HTT some of the bulbs were damaged, as was shown by dissection at the end of the HTT. The CO₂ production did not show significant differences between unaffected and damaged samples, although the samples that showed HD generally produced more CO₂. On the return of the bulbs to 30°C a peak in the CO₂ production was observed suggesting an ethylene-enhanced respiration.
Gas-chromatographic analysis of samples from air, led through the incubation vessels, did not clearly show components that were related to the occurrence of HD, although sometimes some hydrocarbons were found, indicating membrane damage.

VI International Symposium on Flower Bulbs

C.Th.C. van der Hulst, W.J. de Munk

hyacinth bulbs, high-temperature storage, yellow disease, CO₂ production, ethylene, volatiles

https://doi.org/10.17660/ActaHortic.1992.325.16