“南盐一号”库拉索芦荟对海水胁迫的响应

考察了4组库拉索芦荟(F0CK、F50CK、F060%、F5060%)叶片的鲜重、干重,叶片内Na+、K+、Mg2+、Ca2+离子的含量以及质膜透性,丙二醛含量。结果表明:同在60%海水(即海水∶淡水体积比3∶2)胁迫下,F5060%的干湿重比远大于F060%的干湿重比;F5060%叶片内的Na+离子含量显著小于常规芦荟,K+离子含量远高于常规芦荟,F5060%芦荟较F060%拥有更高的K+/Na+和更低的Na+/Ca++;芦荟叶片的质膜透性显著上升,丙二醛含量也有小幅度上升,但F50上升幅度都较F0小。可见,F50库拉索芦荟较F0库拉索芦荟在抗海水胁迫能力上有一定程度的提高。

Response of "Nan Yan 1" Aloe vera to Seawater

The fresh weight(FW),dry weight(DW),the contents of Na~+,K~+,Mg~(++), Ca~(++),MDA content and plasma-membrane permeability of four groups of Aloe vera leaves(F_0CK 、F_(50)CK、 F_060%、 F_(50)60%) were determined,and the results showed that: under the treatment of using 60% seawater(the volume of seawater: the volume of freshwater 3: 2),more dry matter was accumulated in F_(50)60% leaves than in the F_060% leaves;the content of Na~+ in F_(50)60% leaves was much less than that in the F_060% leaves and the content of K+ was significantly more than that in the F_060% leaves.The plasma-membrane permeability and the MDA content of Aloe vera leaves tend to increased by seawater,but the two parameters in F_(50)60% leaves were both less than that in the F_060% leaves.Therefore,F_(50) was proved to be more salt-tolerant than F_0 in a certain extend due to more dry matter accumulation,higher K~+/Na~+ ratio and lower Na~+/Ca~(2+) ratio.