ISHS Acta Horticulturae 433: I International Symposium on Edible Alliaceae
POSSIBLE INVOLVEMENT OF JASMONIC ACID IN BULB FORMING OF GARLIC (ALLIUM SATIVUM L) |
| Authors: | A. Rossi Jaume, G. Abdala, R. Tizio, M. Corral, L. Grosso |
| Keywords: | Allium sativum L. - jasmonic acid - bulbing - garlic - GC-MS |
| Abstract:
Bulbs in Allium sativum L. are formed in response to exogenous stimulus like temperature and daylength, which at determinated levels may induce bulbing and anti-bulbing hormones synthesis. Jasmonic acid (JA) and derivative compounds are postulated as bulbing and tuberization regulators because their capacity to disrupt cortical microtubules producing a growth reorientation. The effect of exogenous JA on in vitro garlic bulb-forming was examined, and it was found that this compound promoted bulb development at a concentration of 1 mg/1. Endogenous JA and its glucosides were isolated and evaluated from garlic leaves and bulbs by partition, charcoal columns, HPLC, GC-MS, and their activity assayed by tuber-inducing on leaflets of potato in vitro cultured. Results obtained from GC-MS analysis concluded that a higher level of free-JA is present in garlic bulbs related to leaves, supporting the idea of JA being synthesized at foliage and transported by phloem to underground, inducing bulb forming. Also a new bioassay was performed, by applying microdrop of pure or endogenous JA to the potato (Solanum tuberosum L.) explants cultured in vitro; this bioassay reinforce the idea of phloem transport from laeves to bulbs. | |
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