两种青葙属植物对土壤锰的耐受性和富集差异
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摘要
以锰超富集植物青葙和同属的非富集植物台湾青葙为对象,在0,50,100,200,300,500 mg/kg 6个浓度梯度下,研究了两种青葙属植物对土壤锰污染的耐受和富集差异。当锰处理浓度为500 mg/kg时,台湾青葙死亡,而青葙仍正常生长。锰胁迫下,青葙的初始荧光(F_0)、光合电子传递速率(ETR)差异不显著(p>0.05),而台湾青葙的F_0显著上升,ETR显著下降(p<0.05)。当锰处理浓度为300 mg/kg时,青葙的总生物量与对照相比增加了11.5%,而台湾青葙的总生物量降低了29.4%。另外,相同的锰处理浓度下,青葙较台湾青葙富集的锰更多,并将85.4%的锰从根部向地上部转移。结果表明,青葙对锰的耐受性和富集性均显著高于台湾青葙,主要是因为青葙具有更强的光合系统保护机制和锰转运能力。
The accumulation and tolerance to Mn in a hyperaccumulator and Celosia argentea, were compared with those in a non-hyperaccumulator C. taitoensis using a pot experiment. The plants were exposed to the soils spiked with 0, 50, 100, 200, 300, and 500 mg/kg Mn. C. taitoensis was unable to survive, while C.argentea still grew well when Mn supply concentrations at 500 mg/kg. Under Mn tress, the initial fluorescence(F_0) and the photosynthetic electron transport rate(ETR) in C. argentea did not significantly change(p>0.05); however, F_0 was significantly increased and ETR was significantly decreased in C. taitoensis(p<0.05). At 300 mg/kg Mn treatment, the biomass increased by 11.5% in C. argentea, while this value decreased by 29.4% in C. taitoensis. Furthermore, C. argentea can accumulate more Mn than C. taitoensis, and 85.4% of the Mn was transported from root to shoot. These results indicated that C. argentea has greater accumulation and tolerance to Mn than C. taitoensis. Why Celosia argentea has stronger accumulation and tolerance to Mn than Celosia taitoensis is that it has stronger photosynthetic system protection mechanisms and Mn transportation from root to shoot.
The accumulation and tolerance to Mn in a hyperaccumulator and Celosia argentea, were compared with those in a non-hyperaccumulator C. taitoensis using a pot experiment. The plants were exposed to the soils spiked with 0, 50, 100, 200, 300, and 500 mg/kg Mn. C. taitoensis was unable to survive, while C.argentea still grew well when Mn supply concentrations at 500 mg/kg. Under Mn tress, the initial fluorescence(F_0) and the photosynthetic electron transport rate(ETR) in C. argentea did not significantly change(p>0.05); however, F_0 was significantly increased and ETR was significantly decreased in C. taitoensis(p<0.05). At 300 mg/kg Mn treatment, the biomass increased by 11.5% in C. argentea, while this value decreased by 29.4% in C. taitoensis. Furthermore, C. argentea can accumulate more Mn than C. taitoensis, and 85.4% of the Mn was transported from root to shoot. These results indicated that C. argentea has greater accumulation and tolerance to Mn than C. taitoensis. Why Celosia argentea has stronger accumulation and tolerance to Mn than Celosia taitoensis is that it has stronger photosynthetic system protection mechanisms and Mn transportation from root to shoot.
引文
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[11]李燕,刘可慧,于方明,等.Mn对超富集植物短毛蓼(Polygonum pubescens Blume)抗氧化机理的影响[J].农业环境科学学报,2011,30(12):2422-2427.
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[13]陈建明,俞晓平,程家安.叶绿素荧光动力学及其在植物抗逆生理研究中的应用[J].浙江农业学报,2006,18(1):51-55.
[14]胡绵好,袁菊红,杨肖娥. 锰超富集植物及其富集机制的研究进展[J].土壤通报,2010,41(1):248-256.
[15]徐莜,杨益新,李文华,等.锰离子浓度及其转运通道对水稻幼苗镉吸收转运特性的影响[J].农业环境科学学报,2016, 35(8):1429-1435.
[2]梁文斌,薛生国,沈吉红,等.锰胁迫对垂序商陆光合特性及叶绿素荧光参数的影响[J].生态学报,2010,30(3):619-625.
[3]尚伟伟,刘杰,张学洪,等.锰胁迫对青葙生长及叶绿素荧光特性的影响[J].生态环境学报,2013,22(8):1353-1357.
[4]LIU J,SHANG W W,ZHANG X H,et al.Mn accumulation and tolerance in Celosia argentea Linn.:A new Mn-hyperaccumulating plant species [J].Journal of Hazardous Materials,2014,267:136-141.
[5]姚诗音,刘杰,王怡璇,等.青葙对镉的超富集特征及累积动态研究[J].农业环境科学学报,2017,36(8):1470-1476.
[6]LIU J,ZHANG X H,MO L Y,et al.Decapitation improves the efficiency of Cd phytoextraction by Celosia argentea Linn [J].Chemosphere,2017,181:382-389.
[7]RALPH P J,SCHREIBER U,GADEMANN R,et al.Coral photobiology studied with a new imaging pulse amplitude modulated fluorometer [J].Phycology,2005,(41):335-342.
[8]张锡洲,张洪江,李廷轩,等.水稻镉耐性差异及镉低积累种质资源的筛选[J].中国生态农业学报,2013,21(11):1434-1440.
[9]郑柳,贺雪莲,邱文敏,等.镉处理后两种景天的光合相关参数变化[J].草业科学,2017,34(5):1024-1031.
[10]杜尧东,李键陵,王华,等.高温胁迫对水稻剑叶光合和叶绿素荧光特征的影响[J].生态学杂志,2012,31(10):2541-2548.
[11]李燕,刘可慧,于方明,等.Mn对超富集植物短毛蓼(Polygonum pubescens Blume)抗氧化机理的影响[J].农业环境科学学报,2011,30(12):2422-2427.
[12]EDGAR PINTO,ANA AGUIAR,ISABEL FERREIRA.Influence of soil chemistry and plant physiology in the phytoremediation of Cu, Mn and Zn[J].Critical Reviews in Plant Science,2014,33(5):351-373.
[13]陈建明,俞晓平,程家安.叶绿素荧光动力学及其在植物抗逆生理研究中的应用[J].浙江农业学报,2006,18(1):51-55.
[14]胡绵好,袁菊红,杨肖娥. 锰超富集植物及其富集机制的研究进展[J].土壤通报,2010,41(1):248-256.
[15]徐莜,杨益新,李文华,等.锰离子浓度及其转运通道对水稻幼苗镉吸收转运特性的影响[J].农业环境科学学报,2016, 35(8):1429-1435.