Abstract:

To select the salt tolerant variety of sweet sorghum, the physiological characters, as chloroplast and MDA of three sweet sorghum varieties (T601, Liaotian-1 and XT-2) under the condition that 0%, 0.4%, 0.8%, 1.2%, 1.6% of NaCl stress were analyzed. And the physiological shapes were observed. The results indicated that: the content of chlorophyll a, chlorophyll b and chlorophyll a+b decreased following the treating time and increasing NaCl percentages. Chlorophyll of three varieties under treatment were lower than the CK. Chlorophyll of T601 was the highest, while of XT-2 was the lowest; the MDA of all three varieties increased following the treating time and increasing NaCl percentages. The MDA of T601 and ‘Liaotian-1’ were lower than XT-2. And during NaCl treating period, the MDA of XT-2 was also higher until the end of treating period. The MDA of T601 was higher than of ‘Liaotian-1’. According to the chlorophyll and MDA, it could be concluded that: the salt tolerance of them were T601 > ‘Litaotian-1’ > XT-2.