Abstract:

New lines of wheat (Triticum aestivum L.) was obtained by introducing the DNA of sorghum ( Sorghum vulgare Pers.) into wheat cultivar “Longchun 13”. The changes of respiratory pathway, contents of protein, Na+ and K+ in the leaves and roots of the new lines of wheat under salt stress were determined and compared with the control cultivar, “Longchun 13”. The decrease of the content of K+ was observed with the increase of NaCl concentrations, but the decrease was more in the control than that in the new lines, and more in roots than in leaves. Content of proline and Na+ in both two wheats lines increased greatly, but the former increased more significantly in the new lines and the latter more significantly in control both in leaves and roots. The operation of the cyanide-resistant pathway of respiration was enhanced at different degrees after salt stress and it increased much more in roots and leaves of the control plant than that in the new lines, but the cytochrome pathway of electron transport was still the main one consistently. The possible significance of these changes was discussed.

盐胁迫下导入外源DNA小麦新品系生理特性与呼吸途径的变化
孔英珍 周功克 崔凯荣 王亚馥*
（兰州大学干旱农业生态国家重点实验室，兰州730000）

关键词： 盐胁迫；耐盐小麦；呼吸途径

Key words: salt stress, salt-tolerant wheat, respiratory pathway