CAJ | 학술논문

通过室内光照培养箱种子萌发试验,研究了Cd2＋和NaCl胁迫对紫花苜蓿(Medicago sativa L．cv．)种子萌发的影响.结果表明,在 NaCl单一胁迫下,随浓度增加对紫花苜蓿种子萌发有明显的抑制作用,种子的发芽势和发芽率抑制作用增强,发芽指数和活力指数下降,丙二醛含量先增加后降低.在 Cd2＋单一胁迫下,低剂量 Cd2＋可促进种子的萌发,高剂量Cd2＋对紫花苜蓿种子的萌发有抑制作用,且随浓度升高,Cd2＋对种子细胞膜的作用强烈,种子的生理受到干扰,MDA 值随 Cd2＋浓度的增加而增加.在 NaCl 和 Cd2＋联合胁迫下,发芽率、发芽势、芽长、根长等胁迫效应介于两种化学物质单独作用效应之间.
통과실내광조배양상충자맹발시험,연구료Cd2＋화NaCl협박대자화목숙(Medicago sativa L．cv．)충자맹발적영향.결과표명,재 NaCl단일협박하,수농도증가대자화목숙충자맹발유명현적억제작용,충자적발아세화발아솔억제작용증강,발아지수화활력지수하강,병이철함량선증가후강저.재 Cd2＋단일협박하,저제량 Cd2＋가촉진충자적맹발,고제량Cd2＋대자화목숙충자적맹발유억제작용,차수농도승고,Cd2＋대충자세포막적작용강렬,충자적생리수도간우,MDA 치수 Cd2＋농도적증가이증가.재 NaCl 화 Cd2＋연합협박하,발아솔、발아세、아장、근장등협박효응개우량충화학물질단독작용효응지간.
Seeds of Medicago sativa L.cv.were used as test material to study the effects of different Cd2+and Salt contents on seed germination.The results showed that under the single stress of NaCl,with the in‐creasing of the concentration,seed germination had been inhibitied obviously,seed germination force and germination percentage had been strongly inhibited,germination indexes and vigour indexes decreased.But MDA gradually increased then decreased ;Under Cd2+ stress,lower concentration of Cd2+ promoted seeds germination,but the higher concentration of Cd2+ inhibited seed germination,and with the concentration of Cd2+ increasing,the MDA decreased and cell membrane of seeds had been affected strongly by Cd2+.Under the stress of the combination of NaCl and Cd2+,the stress effects such as seeds germinate percentage,ger‐mination vigour,bud length and root length were between two chemicals conducts stress separatly.