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林业科学 ›› 2005, Vol. 41 ›› Issue (3): 58-62.doi: 10.11707/j.1001-7488.20050310

• 论文及研究报告 • 上一篇    下一篇

低磷胁迫下马尾松种源酸性磷酸酶活性差异

谢钰容1 周志春1 廖国华2 金国庆1 陈跃3   

  1. 1.中国林业科学研究院亚热带林业研究所,富阳311400;2.福建省三明市林业局,三明365000;3.福建省南纸股份有限公司,南平353000
  • 收稿日期:2003-05-12 修回日期:1900-01-01 出版日期:2005-05-25 发布日期:2005-05-25

Difference of Induced Acid Phosphate Activity Under Low Phosphorus Stress of Pinus massoniana Provenances

Xie Yurong1,Zhou Zhichun1,Liao Guohua2,Jin Guoqing1,Chen Yue3   

  1. 1 Research Institute of Subtropical Forestry,CAF Fuyang311400;2 Sanming Forest Bureau of Fujian Province Sanming365000; 3 Fujian Nanping Paper Co.Ltd. Nanping353000
  • Received:2003-05-12 Revised:1900-01-01 Online:2005-05-25 Published:2005-05-25

摘要:

设计3种磷水平的水培和土培试验,研究马尾松5个不同种源酸性磷酸酶(Apase)活性和分泌性Apase活性以进一步阐明造成马尾松不同种源对磷肥反应差异的适应机制及与磷效率等关系。结果表明,低磷胁迫会刺激马尾松根系Apase向根际的分泌,其中福建武平和广东信宜种源根系分泌性Apase活性较强,浙江淳安、江西崇义种源较低,仅为福建武平种源的50%左右。在磷饥饿的诱导下,生长高峰期马尾松种源根系和针叶的Apase活性显著提高,表现出与磷素水平的负相关,根系的Apase活性在总体上高于针叶。统计分析发现,低磷水平下马尾松不同种源根系和针叶Apase的活性存在显著的遗传差异,以福建武平和广东信宜2种源的活性最高。结合这2种源具有较高的光合速率和磷效率,可以认为福建武平和广东信宜乃耐低磷型优良种源。测定结果还发现,马尾松幼苗Apase的活性在生长高峰期过后将急剧下降,不同种源间未显示出明显的差异。

关键词: 马尾松, 种源, 低磷胁迫, 酸性磷酸酶活性

Abstract:

Liquid and soil culture experiment at 3 phosphorus levels were conducted to study the acid phosphatase (Apase) and secreted Apase activity of 5 Masson Pine provenances and further illustrate their adaptive mechanisms to phosphorus deficiency and relationship with phosphorus efficiency. The results indicated that phosphate starvation would intensively stimulate the release of Apase by root of seedlings. The Apase activity secreted by root in Wuping of Fujian and Xinyi of Guangdong was found to be stronger, and that in Chunan of Zhejiang and Chongyi of Jiangxi was the weaker, which was only about half of Wuping of Fujian. Apase activity in seedling root and leaf increased obviously under low phosphorus stress during growth peak period, showing negatively related to phosphate supply. In general, the Apase activity of root system was stronger than that of leaf. The statistic analysis showed that there existed marked differences among provenances tested for Apase activity in root and leaf under phosphorus starvation. Likewise, Wuping of Fujian and Xinyi of Guangdong had stronger activity, which were thought to be excellent provenances adapted to low phosphorus environment with stronger photosynthesis and higher phosphate efficiency. Apase activity of seedling was found to decline so drastically after growth peak period that there were no obvious differences among all provenances tested.

Key words: Pinus massoniana, provenances, low phosphorus stress, Apase activity