ABA及其生物合成抑制剂对丹参毛状根酚酸类成分和关键酶的影响

目的:研究脱落酸(ABA)及其生物合成抑制剂氟啶酮(fluridone),对丹参毛状根酚酸类成分和关键酶的影响。方法:继代培养18 d的丹参毛状根添加不同浓度的ABA及ABA与氟啶酮组合,处理1 d后测定关键酶PAL和TAT活性;处理6 d后测定不同处理的丹参毛状根中酚酸类物质的含量。结果:在一定浓度范围内,低浓度的ABA促进丹参毛状根的生长,高浓度的ABA抑制丹参毛状根的生长;ABA显著促进酚酸类物质的积累,对咖啡酸的诱导表现出正相关,但是迷迭香酸和丹酚酸B的效果,表现出在低浓度效果较好,随浓度增大,诱导效果降低,直到ABA浓度至200μmol.L-1,含量开始上升;当ABA与氟啶酮组合处理时,氟啶酮抑制ABA对丹参毛状根酚酸类的积累,但是有差异;不同浓度的ABA会不同程度的提高PAL和TAT酶的活性,添加ABA生物合成抑制剂,酶活性诱导效果降低。结论:ABA能诱导丹参毛状根中酚酸类化合物积累,同时也能激活合成相关酶的活性;ABA生物合成抑制剂氟啶酮不同程度抑制ABA的诱导效果。

Effects of ABA and its biosynthetic inhibitor fluridone on accumulation of penolic acids and activity of PAL and TAT in hairy root of Salvia miltiorrhiza

Objective: To study the function of ABA and fluridone on the contents of penolic acids and two key synthetases (PAL and TAT). Method: Conducted 4 different concentrations in the hairy root of Salvia miltiorrhiza after culturing 18 days and treated with fluridone. One day later, harvested the hairy root and measured the activity of PAL and TAT; Treatment for 6 days, gathered and determined the contents of phenolic acids. Result: In certain concentration of ABA, lower ABA could induced the production of growth and higher ABA inhibitor the growth in hairy roots of S. miltiorrhiza; ABA induced the accumulation of caffeic acid considerably, and the effect on the contents of coffee acid show positive correlation; As for the RA and LAB, the low dosage of ABA simulated the production and higher ABA inhibited the production of them; the ABA biosynthetic inhibitor fluridone can decreases ABA's the effect; The different of ABA activated the activity of PAL and TAT, but the impact were discriminating, when treatment with ABA and fluridone, the inducing were declined. Conclusion: ABA induced the accumulation of