应用生态学报2011，Vol.22Issue(12)：3157-3162,6.
茉莉酸甲酯对干旱及复水条件下烤烟幼苗叶绿素荧光特性的影响
Effects of foliar spraying methyl jasmonate on leaf chlorophyll fluorescence characteristics of flue-cured tobacco seedlings under drought and re-watering
摘要
Abstract
Taking the flue-cured tobacco variety of "Longjiang 911" from Heilongjiang Province of Northeast China as test material, a pot experiment was conducted to study the effects of foliar spraying different concentration methyl jasmonate ( MeJA) on the seedlings leaf chlorophyll content and chlorophyll fluorescence characteristics during the transplantation stage under drought and re-watering. Under drought condition, the leaf chlorophyll content, maximum fluorescence ( Fm ) , potential activities of PSII (Fv/Fo) , maximum photochemical efficiency ( Fv/Fm ) , actual photochemical efficiency ( φpsⅡ ) , apparent electron transport rate (ETR), and photochemical quenching ( qp) decreased, but the minimal fluorescence ( Fo) and non-photochemical quenching ( qN ) increased. Foliar spraying 0. 2 and 0. 5 mmol · L-1 of MeJA had obvious positive effects in mitigating the decrease of Fv/Fm, Fv/Fo,φpsⅡ, and qp and the increase of qn under drought stress, while spraying 1.0 mmol · L-1of MeJA had lesser effects. After re-watering, all the leaf chlorophyll fluorescence indices had obvious recovery, and spraying MeJA made the indices more close to the original levels before drought. It was suggested that foliar spraying MeJA could alleviate the degradation of chlorophyll and play definite role in protecting the PSII under drought stress, decrease the damage of drought stress on the seedlings, promote the rapid MeJA recovery of chlorophyll fluorescence parameters after re-watering, and thus, ensure the regrowth of flue-cured tobacco seedlings.关键词
烤烟/干旱和复水/茉莉酸甲酯/叶绿素荧光特性Key words
flue-cured tobacco/ drought and re-watering/ methyl jasmonate/ chlorophyll fluorescence characteristics分类
农业科技引用本文复制引用
金微微,王炎,张会慧,焦志丽,王鹏,李鑫,岳冰冰,孙广玉..茉莉酸甲酯对干旱及复水条件下烤烟幼苗叶绿素荧光特性的影响[J].应用生态学报,2011,22(12):3157-3162,6.基金项目
国家自然科学基金项目(30771746,31070307)和黑龙江省烟草专卖局项目(2007,2009)资助. （30771746,31070307）
