摘要
为了明确重金属铬胁迫对丹参种子萌发、幼苗生长与生理指标的影响,采用不同浓度(0、50、100、150、200、250 mg/L)K_(2)Cr_(2)O_(7)处理丹参种子,测定种子发芽率和幼苗根长、苗鲜质量、叶绿素含量及抗逆酶活性等指标。结果表明,丹参种子发芽率及幼苗根长、苗鲜质量、叶绿素含量均随着Cr^(6+)浓度增加而下降;随着Cr^(6+)浓度增加,丹参幼苗POD活性显著升高,CAT活性先升高后降低,SOD活性逐渐下降,Pro和MDA含量增加。研究表明,Cr^(6+)对丹参种子萌发及幼苗生长有显著的胁迫和毒害作用,幼苗根的生长受Cr^(6+)胁迫最为严重。
To clarify the effects of heavy metal Cr^(6+)stress on seed germination,seedling growth,and physiological indicators of Salvia miltiorrhiza Bunge.Different concentrations of K_(2)Cr_(2)O_(7) with 0,50,100,150,200,250 mg/L were used to treat Salvia miltiorrhiza Bunge seeds,and measure indicators such as seed germination rate,seedling root length,fresh weight,chlorophyll content,and stress resistant enzyme activity.The results showed that with the increase of chromium concentration,the germination rate of Salvia miltiorrhiza seeds,root length,fresh weight,and chlorophyll content of seedlings decreased,the POD activity of Salvia miltiorrhiza seedlings significantly increased,CAT activity first increased and then decreased,SOD activity gradually decreased,and the content of proline and MDA increased.Cr^(6+)had significant stress and toxicity effects on the germination of Salvia miltiorrhiza seeds and seedling growth,and the growth of seedling roots was most severely affected by Cr^(6+)stress.
作者
李秋莹
于婵
周艳
李贺敏
夏至
陈欣
黄勇
LI Qiuying;YU Chan;ZHOU Yan;LI Hemin;XIA Zhi;CHEN Xin;HUANG Yong(College of Agronomy,He'nan Agricultural University,Zhengzhou 450046,China)
出处
《种子》
北大核心
2024年第1期124-129,共6页
Seed
基金
河南省科技研发计划联合基金(222103810008)
河南省重点研发与推广专项(172102110051)。
关键词
铬
丹参
种子
发芽率
生理特性
chromium
Salvia miltiorrhiza Bunge
seed
germination rate
physiological characteristics
