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| Content Provider | Springer Nature Link |
|---|---|
| Author | Grzyb, Małgorzata Kalandyk, Agnieszka Waligórski, Piotr Mikuła, Anna |
| Copyright Year | 2017 |
| Abstract | Somatic embryogenesis (SE) of Cyathea delgadii presents a model system for investigating the mechanisms associated with the acquisition of embryogenic competence by single epidermal cells of stipe explants cultured on plant growth regulator-free medium. The present work reveals relationship between endogenous hormone and sugar content in the process of early SE in C. delgadii. By comparing two types of initial explants, i.e. incapable (non-etiolated) and capable (etiolated) of SE, it was established that in etiolated explants, the glucose, fructose, sucrose, and abscisic acid (ABA) contents diminished, but indole-3-acetic acid (IAA) and cytokinins (CKs; i.e. cis/trans zeatin, cis/trans-zeatin riboside, kinetin, kinetin riboside, isopentenyladenosine) contents increased. The ratios between phytohormones revealed that a high concentration of ABA is the main factor inhibiting SE induction. Because of explant excision, a dramatic reduction in concentration of all phytohormones studied was observed, but hormonal balance and sugar content remained almost unchanged. During the 14-day-long culture, the ABA/CKs and ABA/IAA ratios remained constant, whereas the greatest differences were detected for the IAA/CKs and Z-type/iPA cytokinin ratios. Excluding day 6 of culture, cytokinins were found to be the predominant phytohormones over IAA. An almost 12-fold increase in soluble sucrose concentration at day 6 of culture might be the switch to the SE expression phase. Frequent cell divisions leading to somatic embryo formation are clearly associated with increase in trans-zeatin riboside content. |
| Starting Page | 387 |
| Ending Page | 397 |
| Page Count | 11 |
| File Format | |
| ISSN | 01676857 |
| Journal | Plant Cell, Tissue and Organ Culture (PCTOC) |
| Volume Number | 129 |
| Issue Number | 3 |
| e-ISSN | 15735044 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2017-02-15 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Etiolation Explant excision High-performance liquid chromatography PGR-free medium Phytohormones Plant Sciences Plant Physiology Plant Genetics & Genomics Plant Pathology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Horticulture |
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