ISHS Acta Horticulturae 558: I International Symposium on Litchi and Longan
ENDOGENOUS HORMONES IN RELATION TO EMBRYO DEVELOPMENT IN LITCHI |
| Authors: | W. Chen, L.X. Lu |
| Keywords: | Abscisic acid; cytokinin; embryo abortion; embryo development; gibberellin; indoleacetic acid; Litchi chinensis Sonn |
| Abstract:
The relationship between embryo development and endogenous hormones in litchi was studied, using normal and aborted ovules of ‘Lanzhu’. In normal ovules, the concentrations of Indoleacetic acid (IAA), gibberellin1+3 (GA1+3) and abscisic acid (ABA) peaked 7 days after anthesis (DAA), and then declined. The concentrations of IAA and GA1+3 increased again during globular to torpedo stage, while cytokinin (CTK) peaked before the globular stage. In aborted ovules, ABA remained at a high concentration throughout, while IAA and GA1+3 declined to their lowest level, CTK was lower than in normal ovules during the embryo abortion period. The concentrations of zeatin riboside group (ZRs), dehydro zeatin riboside group (DHZRs) and isopentenyladenosine group (iPAs) varied indicating different roles in embryo development. The possible roles of these hormones on embryo development are discussed. | |
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