The effect of silver thiosulphate pre-treatment on 1-aminocyclopropane-1-carboxylic acid content and action in cut carnations |
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| Authors: | H Veen AAM Kwakkenbos |
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| Institution: | Centre for Agrobiological Research, P.O. Box 14, 6700 AA Wageningen The Netherlands |
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| Abstract: | Endogenous 1-aminocyclopropane-1-carboxylic acid (ACC) levels, and the ACC → ethylene (C2H4) conversion of exogenously applied ACC in naturally senescing and silver thiosulphate (STS) pre-treated cut carnations, were investigated. Under natural conditions, increase in ACC accumulation coincided with the onset of the climacteric rise in C2H4 production. Flowers pre-treated with STS did not show this increase in ACC content. Exogenously applied ACC caused wilting within 24 h and an increase in C2H4 production up to 1300 nl/h/flower. Flowers successively treated with STS and ACC produced C2H4 at quantities much higher than the controls, but showed no wilting. Together, these data suggest that the binding of C2H4 to its receptor leads to an increase in the production of ACC and of C2H4. By blocking the C2H4 action, the silver ion inhibits the autocatalytic increase in C2H4 and the accompanying rise in ACC content. |
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