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| Abstract |
Year: 2002 Volume: 27 - Issue: 5
| Title: | Hentriacontane: a leaf hydrocarbon from Syzygium jambos with stimulatory effects on the germination of urediniospores of Puccinia psidii |
| Author: | TESSMANN DAURI J. ; DIANESE JOSÉ C. |
| Abstract: | A crude Sohxlet extract from leaves of Syzygium jambos was sequentially fractionated using a silica gel flash column. A bioassay based on the numbers of urediniospores of Puccinia psidii that germinated in 2% water agar detected an active stimulant of germination when the fraction eluted with 100% n-hexane was used. The active fraction induced up to 88% increase in germination when added to a spore suspension in mineral oil. The active fraction was characterized as a hydrocarbon by ¹H nuclear magnetic resonance, 13C nuclear magnetic resonance, and infrared analysis. Gas chromatography-mass spectrometry analysis indicated that the fraction was a long-chain 436 MW hydrocarbon with corresponding to C31H64, namely hentriacontane. This is the first time such a compound proved to be involved with stimulation of fungal spore germination. These results may contribute to better understanding the infection process of rusts. |
| Journal: | Fitopatologia Brasileira |
| Issn: | 01004158 |
| EIssn: | 16784677 |
| Year: | 2002 |
| Volume: | 27 |
| Issue: | 5 |
| pages/rec.No: | 538-542 |
| Key words | germination ; Myrtaceae ; rust ; Urediniospores ; fungal spore germination |
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