木霉Ta650对杨树移栽苗生长及光合特性的影响  

Effects of Trichoderma asperellum 650 on the Growth and Leaf Photosynthetic Characteristics of Transplanted Poplar Seedlings (Populus davidiana×P.alba var.pyramidlis)

作　　者：朱国栋[1] 吕曼曼[1] 杨兴堂[1] 王慧[1] 刘志华[2] 张荣沭[1] 

机构地区：[1]东北林业大学园林学院,哈尔滨150040 [2]东北林业大学林学院,哈尔滨150040

出　　处：《中国农学通报》2015年第10期7-12,共6页Chinese Agricultural Science Bulletin

基　　金：国家自然科学基金资助项目"木霉诱导下杨树ARF转录因子对其生长及抗病的分子调控机制"(31370642);国家自然科学基金资助项目"棘孢木霉的刺激植物响应蛋白Epl1诱导杨树系统抗病性机制"(31170601);黑龙江省博士后科研启动金资助项目"棘孢木霉Epl1基因高效表达工程菌的构建及其生防机制研究"(LBH-Q11176)

摘　　要：为了研究棘孢木霉Ta650对木本植物的促生长作用,笔者以‘山新杨’组培移栽苗为供试材料,采用盆栽试验方法,分析根施5×103cfu/cm3土(T)水平的木霉Ta650分生孢子对杨树苗生长状况和光合特性的影响。结果表明:木霉分生孢子诱导后杨树苗苗高、地茎和生物量均显著高于对照(CK)(P<0.05)。T与CK组的净光合速率(Pn)日变化均呈单峰型,在12:00点处达到峰值。并且T组的Pn值在10:00—14:00期间显著高于CK(P<0.05)。同时,T组的气孔导度和蒸腾速率(除8:00)外均显著高于CK(P<0.05)、胞间CO2浓度在8:00和12:00处与CK相比出现显著差异(P<0.05),且均与CK变化趋势相同。另外,木霉诱导后杨树苗的最大净光合速率、光饱和点和表观量子效率等参数均高于CK。说明棘孢木霉Ta650能显著增强杨树的光合能力,从而促进其生长。The paper aims to study the growth promotion action on woody plant induced by Trichoderma asperellum 650. Taking tissue-cultured Shanxin poplar（Populus davidiana×P. alba var. pyramidlis） seedlingstransplanted into pots as the material, the effects of the addition of T. asperellum 650 conidia onto the root at T（5×10^3cfu/cm^3soil） concentration on the growth and photosynthetic characteristics of seedlings were studied.The results showed that the average plant heights, base diameters and biomass yield of T group were allsignificantly higher than those of CK（P0.05）. The net photosynthetic rate（Pn） curves of T and CK groupswere both single-peaked and the peak values were achieved at the time point of 12：00. The Pn of T remainedsignificantly higher than that of CK throughout the duration of 10：00-14：00（P〈0.05）. On the other hand, thestomatal conductance and transpiration rate of T also remained significantly higher than those of CK（P〈0.05）except for the time point of 8：00. Although T showed significant difference from CK in the daily intercellularCO2 concentration at the time points of 8：00 and 12：00（P〈0.05）, the trends of its changes still coincided withthat of CK. What＇s more, the maximum net photosynthetic rate, light saturation points and apparent quantumefficiency of the poplar seedlings all exceeded those of CK after T. asperellum 650 induction. All the above results indicated that T. asperellum 650 induction significantly improved the photosynthetic efficiency of theShanxin poplar thus promoted seedling growth.

关 键 词：棘孢木霉 山新杨 生长促进 光合特性 

分 类 号：S476[农业科学—农业昆虫与害虫防治]