untreated plants in ethylene, had abscised. In contrast, total leaf abscission was only 50, 35, or 9% in plants pretreated with a single application of 50, 100, or 200 mg/liter of AgNO3, respec tively. Considering the level of ethylene (12 ,l/liter) and the prolonged exposure time (7 days), this was a remarkable degree of protection. As shown by the height of the plants in Figure 2, AgNO3 treatment also slightly reduced the growth-retarding effect of ethylene. Other similar experiments with mature fruiting cotton plants have demonstrated a similar ability of AgNO3 to prevent young fruit and flower abscission
untreated plants in ethylene, had abscised. In contrast, total leaf abscission was only 50, 35, or 9% in plants pretreated with a single application of 50, 100, or 200 mg/liter of AgNO3, respec tively. Considering the level of ethylene (12 ,l/liter) and the prolonged exposure time (7 days), this was a remarkable degree of protection. As shown by the height of the plants in Figure 2, AgNO3 treatment also slightly reduced the growth-retarding effect of ethylene. Other similar experiments with mature fruiting cotton plants have demonstrated a similar ability of AgNO3 to prevent young fruit and flower abscission
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