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Enhanced leaf chlorophyll levels in plants treated with seaweed extract (1996)

Blunden, Gerald ; Jenkins, Teifryn ; Liu, Yan-Wen

Springer

Journal of applied phycology 8 (1996), S. 535-543

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ISSN: 1573-5176

Keywords: Ascophyllum nodosum ; betaines ; commercial seaweed extract ; leaf chlorophyll ; soil application

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Abstract Application to the soil of an aqueous alkaline extract ofAscophyllum nodosum resulted in higher concentrations of chlorophyll in the leaves of treated plants in comparison to control plants treated with an equivalent volume of water. Positive results were obtained with all species tested (tomato, dwarf French bean, wheat, barley, maize). When the seaweed extract was applied as a foliar spray, similar effects on leaf chlorophyll contents were obtained, except in the case of dwarf French bean plants, for which no significant difference was recorded between test and control plants. When the betaines present in the seaweed extract were applied as a mixture in the same concentrations as those in the diluted seaweed extract (γ-aminobutyric acid betaine 0.96 mg L−1, δ-aminovaleric acid betaine 0.43 mg L−1, glycinebetaine 0.34 mg L−1), very similar leaf chlorophyll levels were recorded for the seaweed extract and betaine treated plants. This suggests strongly that the enhanced leaf chlorophyll content of plants treated with seaweed extract is dependent on the betaines present.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02186333

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On-line microwave-induced helium plasma atomic emission detection for capillary zone electrophoresis (1993)

Liu, Yan ; Lopez-Avila, Viorica

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 16 (1993), S. 717-720

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ISSN: 0935-6304

Keywords: Capillary zone electrophoresis (CZE) ; Microwave-induced helium plasma atomic emission detector ; On-line capillary zone electrophoresis with atomic emission detection ; Organotin compounds ; Chemistry ; Analytical Chemistry and Spectroscopy

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: We report a feasibility study on using a microwave-induced helium plasma atomic emission detector (MIP-AED) as an on-line detector in capillary zone electrophoresis (CZE). To couple CZE to MIP-AED, we used an ion exchange membrane capillary to connect the separation capillary to the interfacing capillary. The outlet end of the interfacing capillary was placed directly in the discharge tube of the MIP-AED system. The electroosmotic flow generated in the separation capillary carried the analytes and the electrolyte buffer solution through the interfacing capillary into the MIP-AED discharge tube where the analytes were detected. The performance of the CZE/MIP-AED system was evaluated with trimethyltin chloride, dimethyltin dichloride, n-propanol, and 2-butanone. The preliminary results indicate that the MIP-AED can be used in CZE to provide element-specific detection for target analytes.

Additional Material: 6 Ill.