Zn对不同品种油菜光合特性、籽粒Zn含量的影响  

The Effect of Zn on Physiological Characteristics and Grain Zn Concentration in Different Varieties of Rape

作　　者：张明中[1] 陈贵青[1] 徐卫红[1] 王慧先[1] 张海波[1] 韩桂琪[1] 刘俊[1] 熊治庭[2] 张进忠[1] 周鑫斌[1] 

机构地区：[1]西南大学资源环境学院,重庆400715 [2]武汉大学资源环境学院,武汉430079

出　　处：《中国农学通报》2012年第30期135-141,共7页Chinese Agricultural Science Bulletin

基　　金：国家自然科学基金项目"重金属胁迫下金属型植物的资源分配及其机理"(20477032);重庆市自然科学基金项目"油菜体内锌素利用效率的生理基础研究"(CSTC;2009BB0008);行业计划项目"西南地区山地都市型观光果园种养模式研究与应用"(20090305604)

摘　　要：为了探讨Zn对不同品种油菜光合特性、籽粒Zn含量的影响,采用盆栽试验比较了5种Zn浓度(0、1.0、5.0、10.0、20.0mg/kg)处理下5个油菜品种的生长、光合特性、籽粒Zn含量及积累量的差异。结果表明,5个油菜品种的根、茎、叶、籽粒及植株干重、光合特性、Zn含量和积累量在品种之间、Zn处理浓度之间的差异显著,品种与Zn浓度的交互效应也达到显著水平。当Zn≤5.0mg/kg时,Zn增加了净光合速率(Pn)、气孔导度(Gs)以及蒸腾速率(Tr),提高了油菜茎、叶、籽粒及总干重。5个品种的籽粒Zn积累量以及ENW、NTHYC和H33的籽粒Zn含量随Zn浓度先增加,在5.0mg/kgZn时达到最大值,然后下降。ENW的籽粒Zn含量和籽粒Zn积累量在5.0mg/kg和10.0mg/kgZn处理时为5个品种最高或次高,分别为172.34mg/kg和164.10mg/kg、2.932mg/pot和2.575mg/pot。In order to study the influence of different Zinc （Zn） levels on physiological characteristics, Zn accumulation in grains of rape, the plant growth, physiological characteristics, concentration and accumulation of Zn in grain for five varieties （LPJCZ, ENW, SYKC, NTHYC and H33） were compared at Zn （0, 1.0, 5.0, 10.0, 20.0 mg/kg） treatments in pot experiments. The dry weights of roots, leaf, straw, grain and plant, physiological characteristics, concentration and accumulation of Zn significantly differed among different varieties and Zn levels. The activities of net photosynthetic rate （Po）, stomatal conductance （Gs）, transpiration rate （Z）, and dry weights of plant, straw, leaf and grain increased at Zn ≤ 5.0 mg/kg. Zinc concentration of roots, straw and leaf for five varieties, and grain Zn concentration for LPJCZ and SYKC increased by increasing of Zn, but grain Zn accumulation for five varieties, and grain Zn concentration for ENW, NTHYC and H33 increased at Zn ≤ 5.0 mg/kg, then decreased at Zn〉5.0 mg/kg. The high concentration and accumulation of Zn in grain were observed in ENW by 172.34 mg/kg （2.932 mg/pot） and 164.10 mg/kg （2.575 mg/pot） at 5.0 mg/kg and 10.0 mg/kg Zn treatments.

关 键 词：ZN 光合特性 籽粒Zn含量 油菜 

分 类 号：S565.4[农业科学—作物学] S143.7