盐胁迫对茄科种子萌发的影响
毕业论文关键词：盐胁迫 茄科 耐盐性 萌发
Effect of Salt Stress on Seeds Germination of Solanaceae
Abstract Using three solanaceae plant seeds (tomatoes, peppers, eggplants) as materials, we studied in seven different concentration of NaCl solution (0, 50mmol/L, 100mmol/L, 150mmol/L, 200mmol/L, 250mmol/L , 300mmol/L) to simulate different degrees of salt stress on the influence of three kinds of solanaceae seed germination, in order to obtain the optimal concentration of three kinds of solanaceae seed germination, to select crop seeds of higher salt resistance, and to provide guidance for regional different soil qualification. Results have shown that under different degrees of salt stress, the tomato seeds, pepper seeds, eggplant seeds, germination of each are not identical. In general, a low salt concentration has promoting to advance the seed germination, and a high salt concentration inhibits seed germination; Among them, under NaCl50mmol/L concentration, seed germination rate of the tomato seeds is the highest (86%), more than control (84%), when the concentration > 50mmol/L, germination rate of tomato seeds dropped, lower than the control, especially in the concentration of 150mmol/L falling significantly; in NaCl concentration not more than 150mmol/L, the role of performance of salt stress on pepper seeds and eggplant seeds is to promote both, germination rate higher than that of control (25%), the difference is that the germination rate of eggplant seeds began to decline after concentration 50mmol/L, and that of pepper seeds began to decline after concentration 100mmol/L, thus we preliminarily concluded that the salt resistance of three kinds of solanaceae seed ranks in the order: pepper seeds > tomato seeds > eggplant seeds.
Key Words: salt stress solanaceae salt tolerance germination
目录
绪论1
1材料与方法2
1.1供试材料及处理..2
1.2各项指标测定及方法.2
2结果与分析.3
2.1盐胁迫对3种茄科种子发芽率和发芽势影响.3
2.2盐胁迫对3种茄科种子相对发芽率和相对发芽势的影响..4
2.3盐胁迫对3种茄科种子发芽指数和相对发芽指数的影响..5
2.4盐胁迫对3种茄科种子相对盐害率的影响6
3讨论与结论6
参考文献..8
致谢10
绪论 茄科（Solanaceae）是双子叶植物中的一类，广泛分布在全世界热带及温带地区，我国产 24 属 105 种，35 变种。茄科植物有重要的经济价值和药用价值，而马铃薯、番茄、优尔椒、茄子等又是重要的粮食和蔬菜作物。本次研究实验即以番茄、优尔椒、茄子这三种茄科种子为实验材料，探究盐胁迫对此三种茄科种子萌发的影响。 番茄（Lycopersicon esculentum） 是茄科茄属番茄亚属的多年生草本植物，是塑料大棚或温室等设施条件下大面积栽培的重要茄果类蔬菜作物之一[1]。俗称西红柿,又叫洋柿子,六月柿,番李子。它既是蔬菜,又可当水果食用,深受人们的喜爱。番茄不仅色泽艳丽,形美喜人,而且道酸甜适口,营养丰富,经常食用不仅可以为人们提供多种天然的维生素,矿物元素和纤维素,而且对强身健体,防病治病亦有一定的作用[2]。 优尔椒 (Capsicum frutescence L)是茄科优尔椒属，是能结优尔椒浆果的一年生或多年生草本植物，又名番椒、海椒、秦椒、优尔茄[3]。优尔椒的果实因果皮含有优尔椒素而有芬芳的辛优尔。因优尔椒含有丰富的营养物质（维生素 C含量在蔬菜中居第一位），所以优尔椒是菜肴中不可缺少的营养食品之一[4]。