Summary
The role of abscisic acid (ABA) in tomato (Lycopersicon esculentum Mill.) zygotic embryogenesis was analysed. ABA and ABA ß-D-glucopyranosyl ester (ABA-GE) changes were determined in seeds and fruit tissues — placenta and mesocarp — during seed development, which was defined with eight embryo stages: from globular (stage 1) to mature embryo (stage 8). In whole seeds, ABA changes paralleled fresh and dry weight pattern curves and could be characterized by a high increase during embryo growth followed by a decrease as the seed matured and dehydrated. Moreover this dehydration phase led, at stage 8, to a new ABA distribution within the seed, preferentially into integument and embryo. Fruit tissue analyses provided new information about the ABA origin in seeds. ABA-GE levels were also measured and the results suggested different ABA metabolism in seed and fruit tissues.
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Abbreviations
- ABA:
-
abscisic acid
- ABA-GE:
-
abscisic acid ß-D-glucopyranosyl ester
- ABTS:
-
2,2′ — azino — bis (3 — ethylben-zthiazoline — 6 — sulfonic acid)
- BHT:
-
butylhydroxytoluene
- DW:
-
dry weight
- ELISA:
-
Ezyme linked immunosorbent assay
- HPLC:
-
high performance liquid chromatography
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Communicated by E.W. Weiler
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Hocher, V., Sotta, B., Maldiney, R. et al. Changes in abscisic acid and its β-D-glucopyranosyl ester levels during tomato (Lycopersicon esculentum Mill.) seed development. Plant Cell Reports 10, 444–447 (1991). https://doi.org/10.1007/BF00233811
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DOI: https://doi.org/10.1007/BF00233811