铝胁迫对白苦瓜幼苗光合特性和丙二醛含量的影响
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摘要
为明确铝胁迫下白苦瓜幼苗光合特性和丙二醛含量的变化规律,本研究以自来水为对照(CK),分别用50 mg/L(T1)、300 mg/L(T2)、500 mg/L(T3)、800 mg/L(T4)的AlCl_3溶液对白苦瓜幼苗进行处理,20 d后测定白苦瓜幼苗光合指标和丙二醛含量。结果表明:白苦瓜幼苗叶片的净光合速率、蒸腾速率、气孔导度、胞间CO_2浓度在T1处理下未发生显著抑制,但随处理浓度的增大光合指标均呈现下降趋势,其中T4处理显著低于CK。随处理浓度的增大,白苦瓜幼苗的膜脂过氧化程度逐渐增强,丙二醛含量显著升高。T2、T3、T4处理的白苦瓜幼苗光合作用既受到气孔因素制约,也受到非气孔因素制约。
In order to study the effects of aluminum stress on photosynthetic characteristics and MDA content of white balsam pear seedlings,with clear water treatment as control(CK),50,300,500 and 800 mg/L AlCl_3 solutions were designed to determine the photosynthetic characters and MDA content after treated for 20 days. The results showed that 50 mg/L Al Cl3 had no significant inhibit effect on the net photosynthetic rate(Pn),transpiration rate,stomatal conductance and intercelluar CO_2 concentration of white balsam pear seedling leaves after 20-day stress. With the increase of the concentration of aluminum,the inhibition effect on photosynthetic characteristics of white balsam pear seedlings gradually became stronger,and all the photosynthetic characters showed decreasing trends. Under the stress of 800 mg/L AlCl_3,they were significantly inhibited compared with CK. With the increase of aluminum concentration,the degree of membrane lipid peroxidation increased gradually,and the content of MDA increased significantly. Under the stress of 300,500 or 800 mg/L AlCl_3,the photosynthesis of white balsam pear was restricted by stomatal factors as well as non stomatal factors.
In order to study the effects of aluminum stress on photosynthetic characteristics and MDA content of white balsam pear seedlings,with clear water treatment as control(CK),50,300,500 and 800 mg/L AlCl_3 solutions were designed to determine the photosynthetic characters and MDA content after treated for 20 days. The results showed that 50 mg/L Al Cl3 had no significant inhibit effect on the net photosynthetic rate(Pn),transpiration rate,stomatal conductance and intercelluar CO_2 concentration of white balsam pear seedling leaves after 20-day stress. With the increase of the concentration of aluminum,the inhibition effect on photosynthetic characteristics of white balsam pear seedlings gradually became stronger,and all the photosynthetic characters showed decreasing trends. Under the stress of 800 mg/L AlCl_3,they were significantly inhibited compared with CK. With the increase of aluminum concentration,the degree of membrane lipid peroxidation increased gradually,and the content of MDA increased significantly. Under the stress of 300,500 or 800 mg/L AlCl_3,the photosynthesis of white balsam pear was restricted by stomatal factors as well as non stomatal factors.
引文
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[14]贾松涛,郑阳霞,邱爽,等.铝胁迫对西瓜幼苗生长及生理特性的影响[J].农业环境科学学报,2014,33(8):1485-1492.
[2]Rout G R,Samantaray S,Das P.Aluminum toxicity in plants:a review[J].Agronomie,2001,21:3-21.
[3]赵会娥,贺立源,章爱群,等.铝胁迫对植物光合作用的影响及其机理的研究进展[J].华中农业大学学报,2008,27(1):155-160.
[4]许中坚,徐冬梅,刘广深,等.红壤中铝、锰和铁在酸雨作用下的释放特征[J].水土保持学报,2004,18(3):20-23,27.
[5]应小芳,刘鹏.铝胁迫对大豆叶片光合特性的影响[J].应用生态学报,2005,16(1):166-170.
[6]郝鲁宁,刘厚田.铝对水稻幼苗的生理影响[J].植物学报,1989,31(11):847-853.
[7]曹洪法,高吉喜,舒俭民.铝对马尾松幼苗影响的研究[J].生态学报,1992,12(3):239-246.
[8]刘家尧,刘新.植物生理学实验教程[M].北京:高等教育出版社,2010.
[9]李淮源,刘柏林,邓世媛,等.铝胁迫对烤烟生长和光合特性的影响[J].烟草科技,2015,48(9):9-13,26.
[10]Sierra J,NёI C,Dufour L,et al.Mineral nutrition and growth of tropical maize as affected by soil acidity[J].Plant and Soil,2003,252(2):215-226.
[11]肖祥希,刘星辉,杨宗武,等.铝胁迫对龙眼幼苗光合作用的影响[J].热带作物学报,2005,26(1):63-69.
[12]Matsumoto H.Cell biology of aluminum toxicity and tolerance in higher plants[J].International Review of Cytology,2000:1-46.
[13]任立民,刘鹏,谢忠雷,等.植物对铝毒害的抗逆性研究进展[J].土壤通报,2008,39(1):177-181.
[14]贾松涛,郑阳霞,邱爽,等.铝胁迫对西瓜幼苗生长及生理特性的影响[J].农业环境科学学报,2014,33(8):1485-1492.