植物生长调节剂对茶新梢叶绿素荧光参数日变化的影响  

Effects of Plant Growth Regulators on Daily Change of Chlorophyll Fluorescence of Tea Shoots

作　　者：胡留杰[1] 彭予咸[2] 徐泽[1] 邓敏[1] 谢堃[1] 皮利[1] 

机构地区：[1]重庆市农业科学院茶叶研究所,重庆永川402160 [2]西南大学食品科学学院,重庆北碚400715

出　　处：《西南农业学报》2013年第4期1459-1462,共4页Southwest China Journal of Agricultural Sciences

基　　金：重庆市科技攻关项目"名优茶机械化采摘技术研究与示范"(CSTC;2010AB1067);重庆市农发资金项目"外源生长调节剂对茶树新梢同步萌发的影响研究"

摘　　要：以茶新梢为对象,研究植物生长调节剂对新梢叶片叶绿素荧光参数日变化的影响。结果表明:3种生长调节剂不同程度地提高了茶新梢初始荧光值(Fo)、最大荧光值(Fm)和非光化学猝灭系数(qN),而实际光合量子产量(Y(Ⅱ))、光化学猝灭系数(qP)、电子传递速率(ETR)日均值低于对照。随着生境光合有效辐射强度增强,光抑制加剧,非光化学能量耗散增加,Fo呈现下降趋势,Fm、Fv/Fm、qN呈现先降低,在中午12:00-14:00达到最低值,后持续上升的趋势,证明不是光合机构的破坏,而是防御过剩光能伤害的一种保护性反应。The trials were conducted to discuss the effects of plant growth regulators application on the daily change of chlorophyll fluores- cence of the tea shoots. The results showed that： 3 kinds of plant growth regulators could increase the minimal fluorescence（ Fo）, maximum fluorescence （Fro） and photochemical quenching coefficient （qN）, but the daily average of effective photochemical quantum yield of PSII （Y（II） ）, photochemical quenching coefficient（qP） and electron photosynthetic transfer rate（ETR） were lower than control. As the in- crease of the intensity d the habitat photosynthetic active radiation, the photoinhihition and non-photochemical energy dissipation increased, that lead to Fo decline, hut Fm, Fv/Fm and qN appeared to decline at forenoon, and reached the lowest point on the time of 12：00 - 14： 00 at noon, and then continued to increase, indicating that it was not photosynthetic mechanism of destruction, but a protective response to dofense the damage of excess light energy.

关 键 词：茶新梢 植物生长调节剂 荧光参数 日变化 

分 类 号：S571.1[农业科学—茶叶生产加工]