外源Ca^(2+)对喜钙植物、随遇植物和嫌钙植物POD活性和相对含水量的影响  

Effects of External Ca^(2+) on the Relative Water Content and POD Activity of Plants being Calcicole,Indifference and Calcifuge

作　　者：王传明[1] 乙引[2] 

机构地区：[1]黔南民族医学高等专科学校,贵州都匀558000 [2]贵州师范大学生命科学学院,贵阳550000

出　　处：《湖北农业科学》2014年第10期2347-2351,共5页Hubei Agricultural Sciences

基　　金：国家自然科学基金项目(30460031)

摘　　要：为了探讨外源Ca2+对喀斯特环境中喜钙植物生理生化的影响,选取喜钙植物单性木兰和伞花木、随遇植物青冈栎与嫌钙植物华山松作为试验材料,通过使用不同浓度外源Ca2+对其进行胁迫处理,并测定其对植物相对含水量、POD活性的影响。结果表明,在较低浓度Ca2+如喜钙植物单性木兰和伞花木、随遇植物青冈栎在0~20 mmol/L、嫌钙植物华山松在0~5 mmol/L等Ca2+浓度具有较高的相对含水量和较低的POD活性,而在较高浓度Ca2+如喜钙植物单性木兰、伞花木和随遇植物青冈栎在30~50 mmol/L嫌钙植物华山松在20~50mmol/L等Ca2+浓度相对含水量降低和POD活性升高,喜钙植物单性木兰和伞花木、随遇植物青冈栎与嫌钙植物华山松相比表现出对高浓度钙离子处理具有较强的适应能力,适宜生长于富钙的环境。To explore effects of external Ca2＋ on physiology and biochemistry of karst plants,the activities of POD and relative water content of Kmeria septentrionalis Dandy （calcicole）, Eurycorymbus cavalerei （calcicole）, Cyclobalanopsis glauca （indifference）and Pinus kwangtungensis Che （calcifuge）were measured and compared. Results showed that to Kmeria septentrionalis Dandy （calcicole）,Eurycorymbus cavalerei（calcicole） and Cyclobalanopsis glauca（indifference）,the activities of POD in leaves were generally low and relative water content in leaves were generally high after treated with 0～20 mmol/L Ca2＋ concentration. The activities of POD in leaves increased or relative water content decreased after treatment with 30～50 mmol/L Ca2＋ concentration. As for Pinus kwangtungensis Chen （calcifuge）,the activities of POD in leaves showed a sustained increasing trend or relative water content in leaves showed a sustained decreasing trend with the increase of Ca2 ＋concentration.

关 键 词：外源CA2+ 相对含水量 POD活性 

分 类 号：S718[农业科学—林学] Q945.78[生物学—植物学]