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兔眼蓝莓品种'Gardenblue'对锰胁迫的响应机制

作  者:
董珊珊;杨海燕;吴文龙;闾连飞;李维林
关键词:
蓝莓;锰胁迫;生理抗性
摘  要:
以兔眼蓝莓'Gardenblue'为试材,采用盆栽试验的方法,研究了不同浓度(0、1.0、2.5、5.0、10.0mmol·L-1)Mn2+胁迫下蓝莓叶片生理和结构的变化.Mn2+胁迫下,叶片中叶绿素(Chl)、类胡萝卜素(Car)和可溶性蛋白质(SP)含量先升后降;过氧化氢(H2O2)、脯氨酸(Pro)含量呈下降趋势,丙二醛(MDA)含量10mmol·L-1 Mn2+处理时有所下降;水杨酸(SA)和乙烯前体(ACC)含量呈上升趋势,脱落酸(ABA)含量在10mmol·L-1Mn2+处理之前较稳定;叶片气孔及表皮细胞无显著变化.综上所述,'Gardenblue'对过量的锰具有一定的耐受性,其中1.0~5.0mmol·L-1Mn2+处理浓度适合其生长.
作  者:
DONG Shanshan;YANG Haiyan;WU Wenlong;LYU Lianfei;LI Weilin;Institute of Botany,Jiangsu Province and Chinese Academy of Sciences;Co-innovation Center for the Sustainable Forestry in Southern China/College of Forestry,Nanjing Forestry University;
关键词:
blueberry;;Mn stress;;physiological resistance
摘  要:
The physiological and structural changes of blueberry leaves under different concentrations of Mn~(2+) were studied by pot experiment with rabbiteye blueberry‘Gardenblue'as material.Under Mn~(2+) stress,the contents of chlorophyll (Chl),carotenoid (Car) and soluble protein (SP) increased first and then decreased;hydrogen peroxide(H_2O_2)and proline (Pro) contents decreased,Malondialdehyde (MDA) content decreased under 10 mmol·L~(-1)Mn~(2+)treatment,salicylic acid (SA) and ethylene precursor (ACC) content increased and abscisic acid (ABA) content was stable before 10 mmol·L~(-1)Mn~(2+)treatment;leaf stomata and epidermal cells did not change significantly.In summary,‘Gardenblue'had a certain tolerance to excess manganese,and 1.0-5.0 mmol·L-~(-1)Mn~(2+)treatment concentration was suitable for its growth.

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