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《Journal of Nuclear Agricultural Sciences》 2018-02
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Study on Drought Resistance of Triticale Lines at the Adult Plant Stage

LI Xue;TIAN Xinhui;DU Wenhua;Key Laboratory of Grassland Ecosystem/College of Pratacultural Science,Gansu Agricultural University;  
In order to identify the drought resistance of 3 Triticosecale Wittmack lines,which are suitable to be planted on alpine pasture of Qinghai Tibet Plateau at the adult plant stage,two triticale varieties of Shida No. 1 and Zhongsi 1048,were used as controls and the rain-proof shelter was used to prevent raining during the growth period of triticale,the content of MDA,soluble sugar and free proline,and the activities of SOD,POD and CAT in leaves of 5 Triticosecale Wittmack lines under different drought stress conditions were studied. The results showed that,the lowest content of soluble sugar( 14. 15 mg·g~(-1)) and MDA( 42. 86 μmol·g~(-1)),and the strongest activity of SOD( 131. 79 U·mg~(-1)),POD( 86. 77 U·mg~(-1)·min~(-1)) and CAT( 197. 03 U·mg~(-1)·min~(-1)) was obtained in triticale variety Shida No. 1 with the drought stress. Triticosecale Wittmack lines J7 and J9 had high content of MDA respectively,( 3. 05 μmol·g~(-1),2. 96 μmol·g~(-1)),but the activities of SOD,POD and CAT were low. Along with the prolonging of the drought stress,the content of soluble sugar,activities of SOD and CAT firstly increased and then decreased,while free proline changed in a wave shape. MDA and the activity of POD increased. No significant differences existed for the drought resistance of 5 Triticosecale Wittmack lines under light and moderate drought stress,while they showed different drought resistance under severe drought stress. The comprehensive evaluation results showed that 5 × Triticosecale Wittmack lines followed the order of Shida No. 1 P1 J7 J9 Zhongsi 1048. The study will lay the foundation for screening the triticale lines with strong drought resistance and adapted to be planted in Qinghai Tibet Plateau drought area.
【Fund】: 国家自然科学基金(31360577);; 教育部博士点基金(20136202110005);; 现代农业产业技术体系建设专项资金资助(CARS-40-09B)
【CateGory Index】: S512
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