当前位置：
X-MOL 学术
›
Ecotox. Environ. Saf.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Genotypic variation for cadmium tolerance in common bean (Phaseolus vulgaris L.).
Ecotoxicology and Environmental Safety ( IF 6.2 ) Pub Date : 2020-01-08 , DOI: 10.1016/j.ecoenv.2020.110178 Ramin Bahmani 1 , Mahsa Modareszadeh 2 , Mohammad Reza Bihamta 3
Ecotoxicology and Environmental Safety ( IF 6.2 ) Pub Date : 2020-01-08 , DOI: 10.1016/j.ecoenv.2020.110178 Ramin Bahmani 1 , Mahsa Modareszadeh 2 , Mohammad Reza Bihamta 3
Affiliation
|
Given the limitation of crop production in Cd-polluted areas, the identification and selection of plant genotypes tolerant to Cd stress are of great significance. In the present work, we show the existence of genotypic variation for Cd tolerance in common bean. The laboratory screening of 25 bean genotypes indicated a significant positive correlation of the mean productivity (MP) and the geometric mean productivity (GMP) with plant fresh weight both in control and Cd-treated plants. A principal component analysis further confirmed this variation and, together with other analyses, led to the selection of genotypes G-11867, Taylor, Emerson, and D-81083 as tolerant genotypes. A total of six bean genotypes with different degrees of Cd tolerance were selected, and their long-term physiological responses to Cd (0, 45, and 90 mg/kg soil) were evaluated. Increasing Cd concentrations led to higher Cd accumulation both in roots and shoots, and to significant rises in the levels of the oxidative stress biomarkers malondialdehyde (MDA), dityrosine (D-T), and 8-hydroxy-2'-deoxyguanosine (8-OH-2'-dG). Remarkable reductions in plant hormone levels and chlorophyll contents, as well as in dry and fresh weight, were observed in Cd-treated plants. Among the examined genotypes, Emerson, Taylor, and G-11867 were found to be more tolerant to Cd owing to lower Cd accumulation and lower oxidative stress levels, as well as higher chlorophyll and hormone contents. Our results contribute to the understanding of the physiological and biochemical basis of Cd tolerance in bean plants and may therefore, be useful for breeding programs directed towards obtaining bean varieties showing low Cd accumulation.
中文翻译：
普通豆（菜豆）对镉的耐受性的基因型变异。
鉴于镉污染地区的作物生产受到限制，对耐镉胁迫的植物基因型的鉴定和选择具有重要意义。在目前的工作中，我们显示了普通豆中Cd耐性的基因型变异。实验室筛查的25个豆类基因型表明，对照和镉处理植物的平均生产力（MP）和几何平均生产力（GMP）与植物鲜重之间呈显着正相关。主成分分析进一步证实了这种变异，并与其他分析一起，导致选择了基因型G-11867，Taylor，Emerson和D-81083作为耐受基因型。总共选择了六种具有不同Cd耐性等级的豆基因型，并评估了它们对Cd的长期生理反应（0、45和90 mg / kg土壤）。Cd浓度的增加导致根和芽中Cd的积累量增加，氧化应激生物标志物丙二醛（MDA），二氢酪氨酸（DT）和8-羟基-2'-脱氧鸟苷（8-OH- 2'-dG）。在镉处理过的植物中，观察到植物激素水平和叶绿素含量以及干重和鲜重的显着降低。在检查的基因型中，由于较低的Cd积累和较低的氧化应激水平以及较高的叶绿素和激素含量，发现Emerson，Taylor和G-11867对Cd的耐受性更高。我们的研究结果有助于人们理解豆类植物对Cd的耐受性的生理和生化基础，因此可能对旨在获得低Cd积累的豆类品种的育种计划很有用。
更新日期：2020-01-08
中文翻译：
普通豆（菜豆）对镉的耐受性的基因型变异。
鉴于镉污染地区的作物生产受到限制，对耐镉胁迫的植物基因型的鉴定和选择具有重要意义。在目前的工作中，我们显示了普通豆中Cd耐性的基因型变异。实验室筛查的25个豆类基因型表明，对照和镉处理植物的平均生产力（MP）和几何平均生产力（GMP）与植物鲜重之间呈显着正相关。主成分分析进一步证实了这种变异，并与其他分析一起，导致选择了基因型G-11867，Taylor，Emerson和D-81083作为耐受基因型。总共选择了六种具有不同Cd耐性等级的豆基因型，并评估了它们对Cd的长期生理反应（0、45和90 mg / kg土壤）。Cd浓度的增加导致根和芽中Cd的积累量增加，氧化应激生物标志物丙二醛（MDA），二氢酪氨酸（DT）和8-羟基-2'-脱氧鸟苷（8-OH- 2'-dG）。在镉处理过的植物中，观察到植物激素水平和叶绿素含量以及干重和鲜重的显着降低。在检查的基因型中，由于较低的Cd积累和较低的氧化应激水平以及较高的叶绿素和激素含量，发现Emerson，Taylor和G-11867对Cd的耐受性更高。我们的研究结果有助于人们理解豆类植物对Cd的耐受性的生理和生化基础，因此可能对旨在获得低Cd积累的豆类品种的育种计划很有用。
京公网安备 11010802027423号