Inhibition of auxin transport by a morphactin

Zusammenfassung Morphactin (IT 3456) verhindert den Auxin-Transport ohne wesentliche Wirkung auf Aufnahme und Polarität der Indolessigsäure 2-¹⁴C inZea mays L. Koleoptilen.

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I am grateful to the Pakistan and Danish Atomic Energy Commissions for the award of fellowship under which the above work was carried out. I am also thankful to E. Merck AG, Darmstadt, for kindly supplying the morphactins.     

Increased marine production of N2O due to intensifying anoxia on the Indian continental shelf

Eutrophication of surface waters and hypoxia in bottom waters has been increasing in many coastal areas, leading to very large depletions of marine life in the affected regions. These areas of high surface productivity and low bottom-water oxygen concentration are caused by increasing runoff of nutrients from land. Although the local ecological and socio-economic effects have received much attention, the potential contribution of increasing hypoxia to global-change phenomena is unknown. Here we report the intensification of one of the largest low-oxygen zones in the ocean, which develops naturally over the western Indian continental shelf during late summer and autumn. We also report the highest accumulations yet observed of hydrogen sulphide (H2S) and nitrous oxide (N2O) in open coastal waters. Increased N2O production is probably caused by the addition of anthropogenic nitrate and its subsequent denitrification, which is favoured by hypoxic conditions. We suggest that a global expansion of hypoxic zones may lead to an increase in marine production and emission of N2O, which, as a potent greenhouse gas, could contribute significantly to the accumulation of radiatively active trace gases in the atmosphere.     

Effect ofβ-Aminoethylisothiuronium-bromide-hydrobromide on the acetate-1-14C incorporation into tissue lipids of irradiated rats

Zusammenfassung Einfluss von Bestrahlung auf die Lipidsynthese, wobei festgestellt wird, dass der Strahlungsschutzstoff AET die Lipidsynthese hemmt.     

Estimation of diffusible auxin under saline growth conditions

Zusammenfassung Der Auxingehalt von Koleoptilenspitzen vonZea mays L.-Keimlingen wird durch saline Wachstumsbedingungen herabgesetzt.

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Part of the work supported by a grant from USDA under the PL-480 research programme.     

Auxin transport under saline growth conditions

Zusammenfassung Ein erhöhter Salzgehalt des Substrats hemmt das Koleoptilen-Längenwachstum vonZea mays, onne indessen einen Einfluss auf den Auxintransport und dessen Polarität auszuüben.

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I am thankful to the Pakistan and Danish Atomic Energy Commissions for the award of a fellowship under which the above work was carried out, and to my colleagues at Risø for their help and hospitality.