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Anatomical and nutritional requirements for induction and sustained growth in vitro of Cymodocea nodosa (Ucria) Ascherson
García-Jiménez, P.; Navarro, E.P.; Santana, C.H.; Luque, Á.A.; Robiana, R.R. (2006). Anatomical and nutritional requirements for induction and sustained growth in vitro of Cymodocea nodosa (Ucria) Ascherson. Aquat. Bot. 84(1): 79-84. https://dx.doi.org/10.1016/j.aquabot.2005.07.006
In: Aquatic Botany. Elsevier Science: Tokyo; Oxford; New York; London; Amsterdam. ISSN 0304-3770; e-ISSN 1879-1522
|  |
| Trefwoorden |
Biology > Anatomy
Canary I.
Chemical elements > Nonmetals > Atmospheric gases > Nitrogen
Chemical elements > Nonmetals > Phosphorus
Flora > Aquatic organisms > Aquatic plants
Population functions > Growth
Techniques > In vitro
Cymodocea nodosa (Ucria) Ascherson, 1870 [WoRMS]
Canary Islands [Marine Regions]
Marien/Kust |
| Author keywords |
Cymodocea nodosa; explant anatomy; growth substance; in vitro; nitrogen;phosphorus |
| Auteurs | | Top |
- García-Jiménez, P.
- Navarro, E.P.
- Santana, C.H.
|
- Luque, Á.A.
- Robiana, R.R.
|
|
| Abstract |
In vitro methods of plant micro-propagation are being considered as a possible solution for the decline in seagrass communities registered worldwide. To achieve successful plant micro-propagation, culture conditions are commonly adjusted empirically within almost species-specific conditions, to comply to the following three conditions: (i) culture establishment (ii) shoot production and (iii) rooting and hardening for planting in soil. Cultures of Cymodocea nodosa were established from axenic explants of the apical meristem (approx. 0.5 cm) which regenerated new leaf or produced leaf regenerating calli (5% of cultivated explants) in media containing 10−6 M of the cytokinin analogue TDZ. Longer ramet explants, not fully axenic, containing internode with leaf and roots were also affected by 10−6 M cytokinins and auxin type of regulators, as they promoted leaf extension (in cm), particularly GA. None of the explants progressed further to massive shoot propagation and new plantlet production. Instead, experiments made with ramet explants which simulated potential produced plantlet revealed that there seems to be a strong interaction within leaf, rhizome and root, since the carbon fixed in the leaf was rapidly translocated to the rest of the tissue (50% in the roots in a FW basis). The explants preferred ammonium and dihydrogen inorganic phosphate as a nutrient source, efficiently assimilating the former regardless of whether such were added to the underground or surface tissue. However, underground tissue was required to maintain P status in the cultivated explants. |
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