An enzymic site of inhibition of gibberellin biosynthesis by Amo 1618 and other plant growth retardants.
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An enzymic site of inhibition of gibberellin biosynthesis by Amo 1618 and other plant growth retardants.
\Wirwille and M1itchell reported that apl)lications of 2'-isoprol)vl-4'(trimethv lammllonium chloride) -5'methylphenvl piperidine-1-carboxvlate (Amo 1618) (fig 1, I) to several types of flowNering plants led to ani abnormial growth habit characterized by shorter stemiis and initernodes (17). Amo 1618 is one of the mllost active of several carbamate esters containiing a q uarternarv ami-moniiumi...
متن کاملGROWTH RETARDANTS: Effects on Gibberellin Biosynthesis and Other Metabolic Pathways.
Plant growth retardants are applied in agronomic and horticultural crops to reduce unwanted longitudinal shoot growth without lowering plant productivity. Most growth retardants act by inhibiting gibberellin (GA) biosynthesis. To date, four different types of such inhibitors are known: (a) Onium compounds, such as chlormequat chloride, mepiquat chloride, chlorphonium, and AMO-1618, which block ...
متن کاملInhibition of Abscisic Acid Biosynthesis in Cercospora rosicola by Inhibitors of Gibberellin Biosynthesis and Plant Growth Retardants.
The fungus Cercospora rosicola produces abscisic acid (ABA) as a secondary metabolite. We developed a convenient system using this fungus to determine the effects of compounds on the biosynthesis of ABA. Inasmuch as ABA and the gibberellins (GAs) both arise via the isoprenoid pathway, it was of interest to determine if inhibitors of GA biosynthesis affect ABA biosynthesis. All five putative inh...
متن کاملGibberellin Production in Pea Seeds Developing in Excised Pods: Effect of Growth Retardant Amo-1618.
The gibberellin content of pea seeds developing in excised pea pods cultured on a medium containing the plant growth retardant AMO-1618 was reduced in comparison with pea seeds cultured on retardant-free medium. The reduction increased with increasing concentrations of AMO-1618. However, at the lowest concentration tested (5 milligrams per liter) the growth of the seeds was not affected whereas...
متن کاملInhibition of Gibberellin Production in the Fungi Gibberella fujikuroi and Sphaceloma manihoticola by Plant Growth Retardants.
The effect of different types of plant growth retardants on fungal gibberellin (GA) formation has been studied in cultures of Gibberella fujikuroi and Sphaceloma manihoticola. Quaternary ammonium compounds (chlormequat chloride, mepiquat chloride, Amo-1618), triazoles (uniconazole and several experimental compounds), and the norbornanodiazetine tetcyclacis inhibited GA biosynthesis in both fung...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1965
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.40.5.948