Exploring the effects of hormone manipulation on the cold tolerance of cool season turfgrasses and cereals
Trinexapac-ethyl (TE), product Primo Maxx, is a gibberellic acid (GA) inhibitor produced by Syngenta. A controlled acclimation study and two field studies were performed, one on AB and CB, and another on cereal crops with known genetic differences in cold tolerance. The results of the field study and the controlled acclimation study on the turfgrass species showed an increased concentration of high molecular weight (HMW) fructan for AB compared to CB. Results from the controlled acclimation study indicated that AB photosynthesis rates were higher than CB 20°C and 10°C. Carbohydrate concentration increased following five weeks of acclimation for both AB and CB in the controlled acclimation study. Both of the field studies had a significant date effect for carbohydrate status, with an increased concentration in HMW fructan in the fall when compared to the spring.