不同小麦品种的抗旱性鉴定
关键词：干旱胁迫；小麦幼苗；生长发育；生理生化9623
Identification of the Drought Resistance of Different Wheat Cultivars
Abstract: In order to study the drought resistance of different wheat varieties, taking six wheat varieties (Zhoumai22, Yumai57, Huaimai22, Luomai22, Jiaomai668 and Wanmai19) as experimental materials, sand culture was used to study the effects of drought stress on growth, development physiological and biochemical changes of wheat seedlings. The results are as follows: being compared with the control group, after drought stress for 6 days, the seedlings of six wheat varieties get wilting, the relative water content of wheat seedling leaves and the relative dry matter growth rate of wheat seedlings decreased, the relative electrolyte leakage rate of wheat seedling leaves increased, the content of soluble sugar, soluble protein and proline increased, and there are differences among different varieties. These results show that drought stress affects the growth and development of wheat seedling via effecting the physiological and biochemical changes of wheat seedlings, and there are certain differences among different varieties.
Key words: Drought stress; Wheat seedling; Growth and development; Physiology and biochemistry
目 录
摘 要 1
引言 2
1.材料和方法 2
1.1材料 2
1.2材料培养与处理 2
1.3测定指标及测定方法 2
1.3.1植株形态测定 3
1.3.2植株相对含水量的测定 3
1.3.3相对干物质增长速率的测定 3
1.3.4电解质渗漏率的测定 3
1.3.5可溶性蛋白含量的测定 4
1.3.6可溶性糖含量的测定 4
1.3.7植物体内的脯氨酸含量的测定 5
2.结果与分析 6
2.1干旱胁迫对小麦幼苗生长发育的影响 6
2.2干旱胁迫对小麦幼苗相对含水量的影响 7
2.3干旱胁迫对小麦幼苗干物质增长率的影响 8
2.4干旱胁迫对小麦幼苗渗漏率的影响 8
2.5干旱胁迫对小麦幼苗可溶性蛋白质含量的影响 9
2.6干旱胁迫对小麦幼苗可溶性糖含量的影响 9
2.7干旱胁迫对小麦幼苗脯氨酸含量的影响 10
3.结论与讨论 10
参考文献 11
致谢 13
不同小麦品种的抗旱性鉴定
引言
小麦是小麦系植物的统称，是一种在世界各地广泛种植的禾本科植物，是世界上最重要的粮食作物之一[1]，在中国的粮食作物中占重要地位[2]。近些年来，随着全球气候的变暖，干旱程度的加剧，干旱成为制约我国粮食生产重要的逆境因素之一，因此研究小麦的抗逆性具有重要的意义。