Physiological responses of needles of Pinus massoniana elite families to phosphorus stress in acid soil

编号 zgly0000818200

文献类型 期刊论文

文献题名 Physiological responses of needles of Pinus massoniana elite families to phosphorus stress in acid soil

作者 HE  You-lan  LIU  Ai-qin  Mulualem  Tigabu  WU  Pengfei  MA  Xiang-qing  WANG  Chen  Per  Christer  Oden 

作者单位 Forestry  College  Swedish  University  of  Agricultural  Sciences 

母体文献 林业研究: 英文版 

年卷期 2013(2)

页码 325-332

年份 2013 

分类号 S 

关键词 Masson  pine  phosphorus  stress  anti-oxidative  system  lipid  peroxidation 

文摘内容 Pinus massoniana Lamb. is a major timber species widely planted in the South China, where the soil is acidic and deficient in phosphorus (P) due to fixation by aluminum and iron. Understanding the physiological responses to rhizospheric insoluble P is essential for enhancing plantation productivity. Thus, a sand culture experiment was conducted with four levels of P treatment (0, 5, 20 g insoluble P and 10 g soluble P), and 11 P. massoniana elite families. Physiological responses were measured after two months of stress. Compared to the normal soluble P treatment, the insoluble P treatment significantly reduced the proline content and the APase activity in the needles, while it significantly increased the catalase activity by 1.3-fold and malondialdehyde content by 1.2-fold. Soluble protein content was unaffected by the treatments, but chlorophyll content was significantly lower in P-deprived treatment compared with soluble and insoluble P treatments. These physiological responses also exhibited highly significant variation among families (p 〈 0.01). The findings suggest that increased catalase activities in the presence of insoluble P might be involved in the activation of an anti-oxidation defense mechanism that scavenges the reactive oxygen species elicited by the stress. And this response has a strong genetic control that can be exploited to identify desirable genotypes.