Yao Xiaoqin, Chu Jianzhou, Wang Guangyin
The College of Life Sciences, Hebei University, Baoding 071002, People's Republic China.
Biol Trace Elem Res. 2009 Sep;130(3):283-90. doi: 10.1007/s12011-009-8328-7. Epub 2009 Feb 13.
The paper reports the effects of selenium (Se) supply on growth and some physiological traits of wheat (Triticum aestivum L. cv Shijiazhuang NO. 8) seedlings exposed to drought stress. The growth and physiological responses of seedlings were different depending on the Se concentration. The higher (3.0 mg Se kg(-1)) and lower amount used (0.5 mg Se kg(-1)) did not significantly affect on biomass accumulation. Treatments with 1.0 and 2.0 mg Se kg(-1) promoted biomass accumulation of wheat seedlings. Treatments at 1.0, 2.0, and 3.0 mg Se kg(-1) significantly increased root activity, proline content, peroxidase (POD), and catalase (CAT) activities, carotenoids (Car) content, chlorophyll content, and reduced malondialdehyde (MDA) content of wheat seedlings. Lower Se treatment did not significantly effect on chlorophyll content and MDA content, although it also increased some antioxidant index (proline and Car content, POD and CAT activities) in wheat seedlings. These results suggest that optimal Se supply is favorable for growth of wheat seedlings during drought condition.
该论文报道了硒（Se）供应对遭受干旱胁迫的小麦（普通小麦品种石家庄8号）幼苗生长及一些生理特性的影响。根据硒浓度不同，幼苗的生长和生理反应有所差异。较高用量（3.0毫克硒/千克）和较低用量（0.5毫克硒/千克）对生物量积累没有显著影响。1.0和2.0毫克硒/千克的处理促进了小麦幼苗的生物量积累。1.0、2.0和3.0毫克硒/千克的处理显著提高了小麦幼苗的根系活力、脯氨酸含量、过氧化物酶（POD）和过氧化氢酶（CAT）活性、类胡萝卜素（Car）含量、叶绿素含量，并降低了丙二醛（MDA）含量。较低硒处理对叶绿素含量和MDA含量没有显著影响，尽管它也增加了小麦幼苗的一些抗氧化指标（脯氨酸和Car含量、POD和CAT活性）。这些结果表明，在干旱条件下，最佳硒供应有利于小麦幼苗的生长。
