Evaluating Ethylene Sensitivity and Exogenous Ethylene Impact on Early Growth of Grafted and Nongrafted Tomato Seedlings

Ethylene sensitivity of grafted and nongrafted tomato ( Solanum lycopersicum ) seedlings with three to four true leaves was examined. The concentration exogenous ethylene that produced symptoms between 1 10 µL?L –1 regardless grafting. Symptoms exposure included leaf epinasty, decreased maximal photochemical quantum yield photosystem II F v / m ), increased plant height (nongrafted only). Grafted plants maintained higher than in response concentrations. Ethylene-damaged showed comparable growth the control 3 weeks after transplanting, but transplant quality diminished as a result at high