NaCl胁迫对坪山柚、福橘实生苗矿质营养吸收特性的影响  

Effects of NaCl stress on the characteristics of mineral nutrition absorption in Citrus grandis and C. reticulata seedlings

作　　者：马翠兰[1] 刘星辉[1] 陈素英[2] 

机构地区：[1]福建农林大学园艺学院,福建福州350002 [2]莆田学院环境与生命科学系,福建莆田351100

出　　处：《植物资源与环境学报》2004年第4期11-14,共4页Journal of Plant Resources and Environment

基　　金：福建农林大学校青年教师基金资助项目(03A03)

摘　　要：　通过沙培和水培实验,采用原子吸收分光光度计法和离子吸收动力学方法,对NaCl胁迫下坪山柚(CitrusgrandisOsbeck'Pingshanyou')和福橘(C.reticulataBlanco'Fuju')实生苗矿质营养吸收特性进行研究。结果表明,随NaCl浓度增加,坪山柚和福橘幼苗地上部及根部Na+、Cl-含量明显增加,K+、Ca2+含量降低。相同浓度NaCl胁迫下,坪山柚地上部及根部Na+、Cl-含量分别低于福橘,而根部K+、Ca2+含量及地上部K+含量、K+/Na+值、Ca2+/Na+值均高于福橘。NaCl胁迫下,坪山柚、福橘幼苗Na+吸收量高于Cl-吸收量,Na+及Cl-的吸收速率均随NaCl浓度的增大而增加。相同浓度NaCl胁迫下,坪山柚对Na+、Cl-的吸收速率低于福橘,这与坪山柚对Na+、Cl-的吸收具有较大的Km值及较小的Vmax值一致,表明坪山柚幼苗比福橘幼苗耐盐性强。By sand culture and hydroponics culture experiments and by using atomic absorption spectrophotometer and ion absorption kinetics method, the effects of NaCl stress on the characteristics of mineral nutrition absorption in seedlings of Citrus grandis Osbeck 'Pingshanyou' and C. reticulata Blanco 'Fuju' were studied. The results showed that Na^(+) and Cl^(-) contents in both root and the above-ground part of C. grandis and C. reticulata seedlings increased obviously with the increase of NaCl concentration, but the contents of K^(+)、Ca^(2+) decreased. The contents of Na^(+), Cl^(-) in root and the above-ground part of C. grandis seedlings were lower than that in C. reticulata respectively, but the contents of K^(+)、Ca^(2+) in root, the content of K^(+) and the value of K^(+)/Na^(+) ,Ca^(2+)/Na^(+) in above-ground part of C. grandis seedlings were higher than that in C. reticulata under the same NaCl concentration. The absorption amount of Na^(+)was higher than that of Cl^(-) in C. grandis and C. reticulata, respectively, the absorption rate of Na^(+),Cl^(-) in C. grandis and C. reticulata seedlings increased as the NaCl concentration increased. The absorption rate of Na^(+) and Cl^(-) in C. grandis was lower than that in C. reticulata under the same NaCl concentration, which coincided with the result that the C. grandis seedlings had higher K_(m) value and lower V_(max) value than that in C. reticulata seedlings under the same NaCl stress. It suggests that the salt tolerance of C. grandis seedlings is stronger than that of C. reticulata seedlings.

关 键 词：盐胁迫 坪山柚 福橘 实生苗 矿质营养吸收特性 耐盐性鉴定 

分 类 号：S666[农业科学—果树学]