Seeds of the water plant Trapa natans L. (water chestnut) can germinate in strict anoxia. The seedlings show seminal roots growing upwards while shoot buds remain quiescent until O2 becomes available. Trapa seedlings are highly tolerant to anoxia. The rate of ethanol fermentation was 21.2 μmol (g FW)−1 h−1, while production of lactate was negligible and lower than that of succinate. The seminal root of Trapa compares better to the rice coleoptile rather than to the rice root, both functionally and as to the metabolic response to anoxia. The anaerobic germination of Nuphar luteum L. and Scirpus mucronatus L. was also characterized by a limited developmental program.

Effects of oxygen level on metabolism and development of seedlings of Trapa natans and two ecologically related species / F. Menegus, L. Cattaruzza, L. Scaglioni, E. Ragg. - In: PHYSIOLOGIA PLANTARUM. - ISSN 0031-9317. - 86:1(1992 Sep), pp. 168-172.

Effects of oxygen level on metabolism and development of seedlings of Trapa natans and two ecologically related species

L. Scaglioni
Penultimo
;
E. Ragg
Ultimo
1992-09

Abstract

Seeds of the water plant Trapa natans L. (water chestnut) can germinate in strict anoxia. The seedlings show seminal roots growing upwards while shoot buds remain quiescent until O2 becomes available. Trapa seedlings are highly tolerant to anoxia. The rate of ethanol fermentation was 21.2 μmol (g FW)−1 h−1, while production of lactate was negligible and lower than that of succinate. The seminal root of Trapa compares better to the rice coleoptile rather than to the rice root, both functionally and as to the metabolic response to anoxia. The anaerobic germination of Nuphar luteum L. and Scirpus mucronatus L. was also characterized by a limited developmental program.
Anoxia;biochemical adaptation ; 1H-NMR spectroscopy ; lactate ; Nuphar luteum ; root ; Scirpus mucronatus ; seedling development ; Trapa natans
Settore CHIM/06 - Chimica Organica
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/178334
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