Growth regulation and Nitrogen Uptake Inhibition of Zoysia matrella Applying Prohexadione Calcium

Abstract

BACKGROUND: Prohexadione-calcium (PC) is a plant growth regulator of cyclohexanedione family acting on inhibiting gibberellin biosynthesis and has been used to regulate shoot elongation of turfgrass in the golf course during the summer season. This study was conducted to investigate the effects of PC on the inhibition of shoot elongation, growth, and nitrogen uptake in Zoysia matrella. METHODS AND RESULTS: Treatments were as follows; non-treatment, control (TE 0.01 a.i. g/m 2 /100 mL), 0.0025PC (PC 0.0025 a.i. g/m 2 /100 mL), 0.005PC (PC 0.005 a.i. g/m 2 /100 mL), 0.01PC (PC 0.01 a.i. g/m 2 /100 mL) and 0.02PC (PC 0.02 a.i. g/m 2 /100 mL). Visual quality and chlorophyll content were not significantly different. As compared to non-treatment, shoot length and clipping yield in 0.005PC, 0.01PC and 0.02PC treatments were decreased by 29-36% and 65-82%, respectively, and those of 0.0025PC were not significantly different. N uptake of Z. matrella after applying PC was decreased by 28.9-77.8% than that of non-treatment. Inhibition effects of PC treatment in Z. matrella were not significantly different from those of control. CONCLUSION(S): These results indicated that the application of prohexadione calcium inhibited shoot elongation, clipping yield and N uptake amount in Z. matrella, and trinexapac-ethyl could be replaced with prohexadione-calcium in turfgrass management.

Changes in the Growth and Quality of Creeping Bentgrass (Agrostis palustris Huds. ‘Penn A1’) Following Gibberelinic Acid (GA₃) Treatment

“…한 지형 잔디들은 국내 여름철의 고온 다습한 기후로 인해 하고 현상이 나타나고, 잔디 관리로 인한 답압이나 생리적 스트레스 로 생육 불량이 나타나므로 이를 예방하기 위하여 식물 생장 조정제를 처리한다 [4]. 잔디에서 활용되는 생장조정제들은 trinexapac-ethyl (TE)이나 prohexadione-calcium (PC) 등을 사용하여 생장을 억제하는 용도로 이용되고 있다 [5].…”

“…식물 생장조정제를 잔디에 처리 할 경우, 포복경의 세포분열과 세포분화 그리고 뿌리와 줄기의 성장을 촉진하거나 억제한다고 알려져 있다 [6]. 잔디관리에서 생장억제제로 활용되는 생장조정제들은 대부분 지베렐린 생합 성을 제한하여 생장을 억제시키는 메커니즘을 갖고 있다 [5]. 잔디의 생장 억제 시 잔디관리에서 깎기 작업에 대한 노력이 감소하여 답압에 의한 잔디의 스트레스가 감소할 수 있다 [7].…”