电场处理油葵种子后对其萌发期抗旱性的影响  

EFFECT OF ELECTRIC FIELD TREATMENT OF SUNFLOWER SEEDS ON THE DROUGHT RESISTANCE IN THE GERMINATION STAGE

作　　者：侯建华[1] 杨体强[2] 吕剑刚[2] 杨丽君[1] 邓一兵 

机构地区：[1]内蒙古农业大学农学院,内蒙古呼和浩特010018 [2]内蒙古大学理工学院,内蒙古呼和浩特010021 [3]浙江海洋大学海洋技术学院,浙江舟山316004

出　　处：《生物物理学报》2003年第2期193-197,共5页Acta Biophysica Sinica

基　　金：国家自然科学基金项目(39860026)

摘　　要：用不同电场条件处理油葵种子,以PEG(聚乙二醇)模拟水分胁迫,通过高渗溶液萌发法、种子吸水率和膜脂过氧化检测法测定电场处理对油葵种子萌发期抗旱性的影响。结果表明,不同处理条件对油葵种子在萌发期对水分胁迫的适应性影响不同。通过电场处理能够提高油葵种子吸水速率及在水分胁迫条件下的发芽势、发芽率;降低水分胁迫对种子细胞膜的伤害,提高种子萌发期体内超氧化物歧化酶、过氧化物酶的活性,减少了膜脂过氧化产物丙二醛的积累。所有这些变化都有利于缓解水分胁迫对油葵种子的伤害,提高其对水分胁迫的适应性。After the sunflower seeds were treated with different electric field strength and water stressed with PEG, the effects of electric field on drought resistance of sunflower seeds in the germinat-ing stage were tested. The germination in high osmotic solution, the seed water absorption and the mem-brane lipid peroxidation were determined. The results have shown that different electric field strength has different effects on the water stress adaptability of the seeds in the germinating stage. The electric field treatment can increase seed water absorption rate, germinating energy, germination rate and decrease the damage to the cell membrane of the seeds. It also can enhance the activity of superoxide dismutase and peroxidase and so the accumulation of malon-di-aldehyde in the seeds can be diminished. All these changes were favorable for reducing the damage and strengthening the adaptability of water stress of the seeds.

关 键 词：电场处理 油葵 种子 萌发期 抗旱性 

分 类 号：S565.5[农业科学—作物学] Q689[生物学—生物物理学]