State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agricultural Science and Technology, Lanzhou University, Lanzhou 730020, China.
Sci China Life Sci. 2012 Sep;55(9):793-9. doi: 10.1007/s11427-012-4359-y. Epub 2012 Sep 27.
Various cadmium (Cd) concentrations (0, 50, 100, 200 and 300 μmol L(-1)) affected Elymus dahuricus seed germination, seedling growth, antioxidative enzymes activities (AEA), and amounts of malondialdehyde (MDA) and proline present. These influences were determined for separate E. dahuricus cohorts known to be either infected (E+) or non-infected (E-) by a Neotyphodium endophyte. Under high Cd concentrations (100, 200 and 300 μmol L(-1)), E+ specimens showed a significantly (P<0.05) higher germination rate and index, as well as higher values for shoot length, root length and dry biomass. However, the germination rate and index, root length and dry weight did not show a significant (P<0.05) difference under the low Cd concentrations (0 and 50 μmol L(-1)). AEA and proline content increased, as did MDA content, in the E+ (vs. E-) specimens under high Cd concentrations. There was no significant (P>0.05) difference under low Cd concentrations. Endophyte infection was concluded to be of benefit to E. dahuricus exposed to high Cd concentrations.
不同浓度的镉（Cd）（0、50、100、200 和 300 μmol L（-1））影响了披碱草种子的萌发、幼苗的生长、抗氧化酶活性（AEA）以及丙二醛（MDA）和脯氨酸的含量。这些影响是针对已知被 Neotyphodium 内生真菌感染（E+）或未感染（E-）的披碱草个体进行的。在高浓度 Cd（100、200 和 300 μmol L（-1））下，E+标本的萌发率和萌发指数明显更高（P<0.05），且芽长、根长和干生物量也更高。然而，在低浓度 Cd（0 和 50 μmol L（-1））下，萌发率和萌发指数、根长和干重没有明显差异（P<0.05）。在高浓度 Cd 下，E+（相对于 E-）标本中的 AEA 和脯氨酸含量增加，MDA 含量也增加。在低浓度 Cd 下没有显著差异（P>0.05）。内生菌感染被认为对暴露于高浓度 Cd 的披碱草有益。
