Wang Fei, Xiao Yu, Cheng Xiao-Mao, Huang Xiao-Xia
College of Landscape Architecture and Horticulture, Southwest Forestry University/Southwest Landscape Architecture Engineering Research Center of State Forestry and Grassland Administration, Kunming 650224, China.
Ying Yong Sheng Tai Xue Bao. 2021 May;32(5):1835-1844. doi: 10.13287/j.1001-9332.202105.031.
We examined the growth and physiological characteristics of and var. by hydroponics at different Cd concentrations (0, 20, 80, 200 μmol·L). The results showed that 20 μmol·L Cd did not affect those two varieties, with no changes of single leaf area, total leaf area, chlorophyll (Chl) a content, Chl (a+b) content, carotenoid content, Chla/Chlb value, intercellular carbon dioxide concentration () and transpiration rate () compared with the control (CK). Under the 80 μmol·L Cd stress, the initial fluorescence () and non-photochemical quenching coefficient (NPQ) were the highest for both varieties. As for Cd at 200 μmol·L, the biomass, chlorophyll content, maximum net photosynthetic rate (), stomatal conductance (), maximum photochemical quantum yield (), actual photochemical quantum yield , the transfer factor (TF) of both varieties and all parts biomass decreased to the lowest, while peroxidase (POD), ascorbic acid peroxidase (APX) and catalase (CAT) activities of two varieties and MDA content of var. increased in different degrees. With the increases of Cd stress, the Cd content in organs of two varieties showed an increasing trend, with higher Cd accumulation in roots. . had higher Cd content and bioconcentration factor (BCF) in all organs than . var. . It suggested that two varieties had the ability to resist Cd stress. The tolerance of . was stronger, and thus could be considered as a green plant to remediate Cd contaminated water or soil.
我们通过水培法在不同镉浓度（0、20、80、200 μmol·L）下研究了[植物名称1]和[植物名称2]变种的生长和生理特性。结果表明，20 μmol·L的镉对这两个品种没有影响，与对照（CK）相比，单叶面积、总叶面积、叶绿素（Chl）a含量、Chl（a + b）含量、类胡萝卜素含量、Chla/Chlb值、细胞间二氧化碳浓度（[具体指标英文缩写1]）和蒸腾速率（[具体指标英文缩写2]）均无变化。在80 μmol·L镉胁迫下，两个品种的初始荧光（[具体指标英文缩写3]）和非光化学猝灭系数（NPQ）均最高。至于200 μmol·L的镉，两个品种的生物量、叶绿素含量、最大净光合速率（[具体指标英文缩写4]）、气孔导度（[具体指标英文缩写5]）、最大光化学量子产量（[具体指标英文缩写6]）、实际光化学量子产量[具体指标英文缩写7]、两个品种的转移因子（TF）以及各部分生物量均降至最低，而两个品种的过氧化物酶（POD）、抗坏血酸过氧化物酶（APX）和过氧化氢酶（CAT）活性以及[植物名称2]变种的丙二醛（MDA）含量不同程度增加。随着镉胁迫的增加，两个品种器官中的镉含量呈上升趋势，根部镉积累量更高。[植物名称1]在所有器官中的镉含量和生物富集系数（BCF）均高于[植物名称2]变种。这表明两个品种具有抵抗镉胁迫的能力。[植物名称1]的耐受性更强，因此可被视为修复镉污染水体或土壤的绿色植物。
