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| 糜子幼苗对不同强度干旱胁迫的形态与生理响应 | |
| 引用本文： | 冯晓敏,张永清,李鹏,闫江艳,王海茹,景小元.糜子幼苗对不同强度干旱胁迫的形态与生理响应[J].干旱地区农业研究,2013,31(2):176-181. |
| 作者姓名： | 冯晓敏 张永清 李鹏 闫江艳 王海茹 景小元 |
| 作者单位： | 1. 山西师范大学生命科学学院,山西临汾,041000 2. 山西师范大学生命科学学院,山西临汾041000;山西师范大学城市与环境学院 山西临汾041000 3. 山西师范大学城市与环境学院 山西临汾041000 |
| 基金项目： | 国家自然科学基金项目，山西省自然科学基金项目 |
| 摘 要： | 采用盆栽方法,研究了人工控水条件下,不同糜子品种苗期干旱条件下的形态和生理特性.结果表明,(1)与正常供水条件相比,轻度水分胁迫下陇糜4号、5283黄、晋黍7号3个品种在株高、叶面积、总根长、根系总体积等形态指标方面变化不大,但在重度胁迫时差异达显著水平；且随着胁迫程度的加剧,3品种各值呈下降趋势,晋黍7号的降幅小于陇糜4号和5283黄；(2)3品种根系的活性氧清除系统和渗透调节物质,随着胁迫程度的增加,SOD、POD、脯氨酸和可溶性糖的含量均呈上升趋势,上升幅度表现为陇糜4号＜5283黄＜晋黍7号,与正常供水相比,3品种的SOD、脯氨酸和可溶性糖在不同处理下与对照相比差异显著,除陇糜4号外,其它2品种的POD在中度和重度水分胁迫下与对照相比差异显著；(3)对叶绿素含量、叶片相对含水量和光合速率,随着胁迫程度的增加,3品种各值均呈下降趋势,晋黍7号受影响最大,3品种的各值在重度胁迫下与对照相比差异显著；(4)对根系活力及细胞膜透性而言,晋黍7号的根系活力受水分胁迫的影响较大,且晋黍7号的细胞膜透性和MDA含量增加幅度大,受干旱损害也大,抵御干旱的能力较弱,其抗旱性相对较弱,雨陇糜4号的抗旱性较强. |
| 关 键 词： | 糜子 干旱胁迫 形态指标 生理生态 综合评价 |
Morphological and physiological responses of broomcorn millet seedlings to drought stress |
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| FENG Xiaomin,ZHANG Yongqing,LI Peng,YAN Jiangyan,WANG Hairu,JING Xiaoyuan.Morphological and physiological responses of broomcorn millet seedlings to drought stress[J].Agricultural Research in the Arid Areas,2013,31(2):176-181. | |
| Authors: | FENG Xiaomin ZHANG Yongqing LI Peng YAN Jiangyan WANG Hairu JING Xiaoyuan |
| Institution: | College of Life Science, Shanxi Normal University, Linfen, Shanxi 041000, China;College of Life Science, Shanxi Normal University, Linfen, Shanxi 041000, China; College of Urban and Environmental Science, Shanxi Normal University, Linfen, Shanxi 041000, China |
| Abstract: | With pot cultivation method, the morphological and physiological characters of different broomcorn millet cultivars at seedling stage were studied under controlled water conditions. The results showed that: (1) Under mild water stress, the morphological parameters of Longmi 4, 5283 Huang and Jinshu 7 such as plant height, leaf area, total root length and total root volume were changed little compared with the control treatment, but they were influenced significantly under severe stress. The values of these parameters of the three tested cultivars tended to decrease with the intensification of water stress, in which, the decrease rate of Jinshu 7 was lower than that of Longmi 4 and 5283 Huang. (2) As for the active oxygen scavenging system and osmolytes, the activity of SOD and POD, and the content of proline and soluable sugar in the tested cultivars wholly tended to increase with the intensification of water stress. The increase rate of the cultivars was ranked as: Longmi 4>5283 Huang>Jinshu 7. The activity of SOD and the content of proline and soluable sugar in the three cultivars under water stress conditions differed significantly with those under the control. The activity of POD in 5283 Huang and Jinshu 7 under moderate and severe water stress differed significantly with that under the control. (3) The chlorophyll content, relative leaf water content and net photosynthetic rate of the three cultivars wholly tended to decrease with the intensification of water stress, in which Jinshu 7 was affected with the largest degree. The values of these parameters under severe stress differed significantly with those under the control. (4) The root activity of Jinshu 7 was influenced remarkably by water stress, and its membrance permeabilitity and MDA content increased largely, so it was injured seriously and its drought-resistant ability was poor, while the droght-resistant ability of Longmi 4 was relatively strong. |
| Keywords: | broomcorn millet drought stress morphological character physiological character synthetic evaluation |
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