钠离子和水杨酸对大蒜根部生命活动的影响
毕业论文关键词：化学试剂；大蒜；根系生长；生理指标
Effects of Sodium and Salicylic Acid on
Vital Movement of Garlic Root
Abstract: Using garlic as experimental material to research the effect of sodium chloride and salicylic acid on root growth and root activity of garlic and soluble protein content and soluble sugar content of apical cells. The results indicated that compared with the control group, low concentrations of sodium chloride solution（0.4％）and salicylic acid（0.5mmol/L）could increase the amount of garlic root, accelerate root growth, enhanced root activity and increase soluble protein and soluble sugar content of root tip cells. When the concentration of sodium chloride and salicylic acid increased, roots of garlic would grow slowly, the root’s color would become yellow, root activity would decrease significantly and soluble protein and soluble sugar content of root tip cells would reduce. The above showed that two kinds of chemical reagents could produce different effects on the growth of garlic. That is to say low concentration of chemical reagents could play a driving role, high concentration of chemical reagents could play an inhibiting role.
Key words: Chemical reagent；Garlic；Root growth；Physical signs
摘 要 1
引言 2
1. 材料与方法 2
1.1 材料 2
1.2 药品与试剂 2
1.3 器具 2
1.4 方法 2
1.4.1 2种化学试剂的配制 2
1.4.2 大蒜处理 3
1.4.3 各种指标测定 3
2. 结果与分析 3
2.1 2种化学试剂对大蒜发根量的影响 3
2.2 2种化学试剂对大蒜种子根尖生长速度的影响 4
2.3 2种化学试剂对大蒜根系活力的影响 4
2.4 2种化学试剂对大蒜根尖细胞可溶性蛋白含量的影响 5
2.5 2种化学试剂对大蒜根尖细胞可溶性糖含量的影响 5
3. 结论与讨论 5
3.1 氯化钠和水杨酸对大蒜根部生长的影响 5
3.2 氯化钠和水杨酸对大蒜根尖细胞可溶性蛋白含量的影响 6
3.3 氯化钠和水杨酸对大蒜根尖细胞可溶性糖含量的影响 6
参考文献 7
致谢 8
钠离子和水杨酸对大蒜根部生命活动的影响
引言
高浓度的钠离子对植物的生长不利，适当浓度的钠离子对植物的生长不仅没有危害，相反还有利于植物的生长。合适浓度的钠离子之所以有益于植物诸多生理功能的顺利进行，主要在于：一、钠元素能够增加植物细胞的渗透势，在具有一定盐浓度的土壤中能提高植物吸水吸肥的能力；二、钠元素可以提高细胞原生质的亲水性，植物吸收部分钠元素以后，细胞内的电解质增加，组成原生质体的胶体即发生变化膨胀，从而提高了原生质体与水的亲和力，提高了细胞的保水潜力，在一定程度上可以降低植物的蒸腾作用；三、钠元素可以促进细胞体积的增大和细胞数目的增多，使植物生长得更快，发育得更好；四、钠元素可以调节叶片的气孔开闭，增强植物光合功能[1]。
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