Prof. Dr. Eike Libbert

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Gibberellic acid (GA) was incubated in agar blocks, transported through hypocotyl sections of sunflower plants, and collected in acceptor blocks of plain agar. The amount of GA transported through the sections was tested with dwarf pea plants using a new test method in which the acceptor block was applied directly to the test plant. The GA transport was(More)
Gibberellic acid (GA) when applied alone is without effect in theAvena curvature test. When applied together with indole-3-acetic acid (IES=IAA; 10−8–10−5 g/ml, GA increases the extent of the IAA-induced curvature by about 40%; this is true with all IAA concentrations including supraoptimal ones. It is computed that the stimulation by GA results from a(More)
Einleitung Die in der Pflanze vorhandene Menge des Auxins Indol-3-essigs~ure (IES) ist ffir viele Wachstumsund Entwicklungsvorg~nge yon grol~er Bedeutung. Sie wird dureh IES-bildende und IES-oxydierende Enzymsysteme mitbestimmt. Alle natfirlichen Faktoren, die diese Enzymsysteme beeinflussen, kSnnen ffir die Pflanze wiehtig sein. Bei Erbsenpflanzen gehSrt(More)
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