ISHS Acta Horticulturae 645: VII International Mango Symposium
HORMONAL CHANGES IN VARIOUS TISSUES OF MANGO TREES DURING FLOWER INDUCTION FOLLOWING COLD TEMPERATURE |
| Authors: | D. Naphrom, P. Sruamsiri, M. Hegele, N. Boonplod, F. Bangerth, P. Manochai |
| Keywords: | Plant hormones, IAA, ABA, GA3, Cytokinins, Mangifera indica L |
| DOI: | 10.17660/ActaHortic.2004.645.58 |
| Abstract:
Cold temperature (around 15°C) plays a major role in flower induction of mango trees. But so far hardly anything is known whether plant hormones mediate this temperature effect. To investigate this question, 16 potted 2-year-old ‘Tommy Atkins’ mango trees were subjected to either 13 or 25°C for 3 months, which led to almost 100 and 0% flowering trees, respectively. After changing the temperature the main plant hormones, viz. IAA, ABA, GA3 and CKs were analyzed in terminal buds, bark and wood of the trees. IAA in leaf diffusates was also measured. In general, Z/ZR concentrations in all tissues, ABA in wood and IAA in leaf diffusates were higher, whereas GA3 and IAA (wood and bark) were lower under cold temperature. | |
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