The effects of gibberellic acid, abscisic acid, cycloheximide, actinomycin D, and cordycepin upon exo- and endoproteolytic activities and storage (gluten) protein hydrolysis in germinating wheat and in incubated embryoless wheat seeds have been studied. Early increases in endoproteolytic activity were insensitive to the addition of gibberellic acid and inhibitors of protein and RNA synthesis. L...

A bstract. This paper describes a new method for qualitative and quantitative assay of abscisic acid and other acidic plant hormones, such as indoleacetic acid and the gibberellins, by the gas-liquid chromatography of their trimethylsilyl derivatives. Interfering substances in plant extracts were largely removed by preliminary oolumn chromatography with carbon-celite and elution of the absoisic...

The plant hormone abscisic acid and the transcriptional activator VIVIPAROUS1 have a synergistic effect on transcription during embryo development. An abscisic acid-responsive element (ABRE) mediates induction by abscisic acid and VIVIPAROUS1, but the mechanism involved has not been determined. In this study, we explore the interaction between abscisic acid and VIVIPAROUS1 and its effect on the...

The involvement of ethylene and abscisic acid in providing stress tolerance and defence response to plants is widely recognized. However, little is known about the cross-talk between glutathione with ethylene and abscisic acid to combat stress in planta. Here, transcriptome analysis of combined cold and osmotic stress treated Arabidopsis mutants were carried out to elucidate the crosstalk betwe...

The plant hormone abscisic acid and the transcriptional activator VIVIPAROUSl have a synergistic effect on transcript ion during embryo development. An abscisic acid-responsive element (ABRE) mediates induction by abscisic acid and VlVlPAROUSl, but the mechanism involved has not been determined. In this study, we explore the interaction between abscisic acid and VIVIPAROUSl and i ts effect on t...

Illumination or gibberellic acid treatment of etiolated barley leaf segments stimulates unrolling and results in an increased level of RNA. In contrast, segments treated with abscisic acid do not unroll and have a lower content of RNA. Gibberellic acid treatment enhanced the capacity of segments to incorporate radioactivity from (32)P-orthophosphate into all the RNA components detected by gel e...