Physiological quality of seeds of three wheat cultivars for different treatments

Abstract

The objective of this study was to evaluate the physiological quality of wheat seed treated with plant growth regulators, triadimenol and Azospirillum brasilense. The experimental design was completely randomized with four replications in a 3x8factorial: three wheat cultivars and eight seed treatments. The cultivars used were CD-150, CD-116 and CD-104, and the treatments were a combination of three different substances: 150 g.L-1 triadimenol (TRI), 90 mg.L-1 kinetin + 50 mg.L-1 giberellic acid + 50 mg.L-1 indolebutyric acid (CGA) and strains Ab-V5 and Ab-V6 of A. brasilense at a concentration of 2.0 x 108 viable cells mL-1 (AZO), as follows: control, TRI, CGA, AZO, TRI+CGA, TRI+AZO, AZO+CGA and TRI+CGA+AZO. Germination and abnormal seedlings (%), shoot and hypocotyl length and the diameter, length and number of roots, dry weight of shoot and root/shoot were determined. The results showed that: the treatments did not affect seed germination; the treatments did not increases the early development of wheat seedlings and triadimenol alone or in combination with A. brasilense plant growth regulator resulted in lower values for shoot, root and hypocotyl length and root number for all the cultivars.