摘要
以2种蓖麻KM1和KM2为材料,在镉浓度为0.0、0.1、0.3、0.5、1.0和2.0 mmol/L的溶液处理下研究了镉胁迫下蓖麻种子萌发的影响。结果表明,KM1在镉离子浓度为0.1 mmol/L时出芽率就降到10%,与对照(0.0 mmol/L)90%出芽率存在极显著差异。而KM2则表现出较强的耐性,在镉离子浓度为2.0 mmol/L时仍有30%以上的出芽率。通过对KM2幼苗的根、茎长度及侧根的数量进行测量,结果表明镉对蓖麻主根长、侧根数、茎长表现低浓度时促进,高浓度时抑制,且随着镉离子浓度的增加,抑制作用增强。
Under the stress of different cadmium concentration,the seed germination of two Ricinus communis L.was studied in this study.The results showed that after treated with 0.0,0.1,0.3,0.5,1.0 and 2.0 mmol/L of Cd2＋,the seed germination rate,root growth and stem growth were restrained evidently.Different Ricinus communis L.varieties had different germination responses to Cd2＋.KM1 was impacted seriously with 10 % seed germination rate in 100μmol/L Cd2＋,while KM2 still had 31 %germination rate in 2.0mmol/L Cd2＋.The seedling roots,stem length and the numbers of lateral roots of KM2 were measured,and the results showed that the low concentration Cd2＋could promote,but the high concentration Cd2＋ might suppress the growth of these indexes.With the increase of Cd2＋ concentration,the suppressing function was enhanced.
出处
《西南农业学报》
CSCD
北大核心
2013年第3期1245-1248,共4页
Southwest China Journal of Agricultural Sciences
基金
云南省环境科学与工程创新人才联合培养项目(A3003015)
鲁地拉水电站土地评价项目(KX132051)
关键词
种子
蓖麻
镉污染
耐性
出芽率
Seed
Ricinus communis L.
Cd contamination
Tolerance
Germination rate
