Effects of diethyl aminoethyl hexanoate (DA‐6) on the growth and cadmium accumulation of tomato seedlings

Abstract

Diethyl aminoethyl hexanoate (DA-6) can lessen the effects of cadmium (Cd) toxicity on some plants. A pot experiment was conducted to examine the impact of different DA-6 concentrations (0, 10, 20, 30, and 40 mg/L) on growth and Cd accumulation of tomato seedlings. A DA-6 concentration of 10 mg/L increased the biomass of roots, stems, leaves, and shoots, while the other concentrations either had no significant effects or inhibited the growth of tomato seedlings. Concentrations 10 and 20 mg/L of DA-6 increased the chlorophyll b and total chlorophyll contents, and the activities of superoxide dismutase and peroxidase. All the four tested concentrations of DA-6 reduced catalase activity and increased the soluble protein content. Importantly, all tested DA-6 concentrations decreased the Cd content of tomato seedling roots, and increased in the Cd contents of stems, leaves, and shoots. While 10 mg/L DA-6 did not significantly affect the translocation factor of tomato seedlings, the other tested DA-6 concentrations enhanced the translocation factor. Therefore, 10 mg/L DA-6 could significantly promote the growth of tomato, but all the tested concentrations of DA-6 could also promote the uptake of Cd in tomato shoots, which could impede the safe production of tomatoes in Cd-contaminated soils.

Effect of plant growth regulators DA-6 and COS on drought tolerance of pineapple through bromelain and oxidative stress

“…DA-6 priming ameliorates seed germination via involvement in hormonal changes, osmotic adjustment, and dehydrin accumulation in white clover under drought stress [ 20 ]. DA-6 has positive effects on the growth and cadmium accumulation of tomato seedlings and can improve the physiology and selenium absorption of grape seedlings [ 21 ]. Exogenous DA-6 improves the low night temperature tolerance of tomatoes through regulation of cytokinin [ 22 ] and ameliorates low temperature stress by improving nitrogen metabolism in maize seedlings [ 23 ].…”