外源SA对NaHCO3胁迫下蚕豆幼苗的光合特性和抗氧化系统的影响
毕业论文关键字：外源SA；NaHCO3胁迫；蚕豆幼苗；光合特性；抗氧化系统
The Influence of Exogenous SA to Broad Bean Seedling Photosynthetic Characteristics and Antioxidant System under NaHCO3 Stress
Abstract: With broad bean seeds as experimental material , adopted a hydroponic method , studied the influence of the different concentration (0 , 20 , 25 , 30 , 35 and 40 mg/L) SA to broad bean seedling photosynthetic characteristics and the antioxidant system under NaHCO3 stress , in order to use the SA alleviate soil salinization damage in the process of broad bean production provide a certain theoretical basis and technical support . Under NaHCO3 stress , plants on the absorption of ions is suppressed , ion balance of plant cells is destroyed , which affects the root physiological function , the root structure is destroyed , and even lead to a big impact on the growth of plants(such as: the photosynthetic characteristics and antioxidant system) . By the experimental results can be obtained , applied salicylic acid significantly increased the photosynthetic rate , the activity of antioxidant enzymes and root work force increased significantly , also make the membrane lipid peroxidation products MDA content significantly decreased under NaHCO3 stress(P < 0.01) . Thus it can be seen that exogenous SA can be able to maintain the stability of cell membrane , reduce the membrane lipid peroxide damage to cell membrane , to a certain extent , improve the alkali resistance of plants .
Key words : Exogenous SA ; NaHCO3 stress ; Broad bean seedling ; The photosynthetic characteristics ; Antioxidant system
目 录
摘 要 1
Abstract 1
引言 2
1. 材料与方法 3
1.1 实验材料 3
1.2 处理方法 3
1.3 测定项目与方法 3
1.4 数据分析 4
2. 结果与分析 4
2.1 外源SA对NaHCO3胁迫下蚕豆幼苗光合色素的影响 4
2.2 外源SA对NaHCO3胁迫下蚕豆幼苗根系活力的影响 5
2.3 外源SA对NaHCO3胁迫下蚕豆幼苗超氧阴离子产生速率的影响 6
2.4 外源SA对NaHCO3胁迫下蚕豆幼苗SOD活性的影响 6
2.5 外源SA对NaHCO3胁迫下蚕豆幼苗POD活性的影响 7
2.6 外源SA对NaHCO3胁迫下蚕豆幼苗CAT活性的影响 8
2.7 外源SA对NaHCO3胁迫下蚕豆幼苗MDA含量的影响 9
3. 讨论 10
参考文献 12
致谢 15
外源SA对NaHCO3胁迫下蚕豆幼苗光合特性和抗氧化系统的影响
引言
蚕豆（Vicia faba L.），一年或两年生草本植物[1]。蚕豆主要分布于亚洲中西部[2]，是我国形体最大的食用豆类[3]。我国是蚕豆种植大国，我国的的蚕豆种植面积占世界蚕豆种植面积的61%。蚕豆营养价值很高，具有粮食、饲料、肥料和蔬菜、药用等多种用途，因此被广泛栽种[5]。
下一篇：异丙嗪对果蝇生长发育的影响