欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报 ›› 2004, Vol. ›› Issue (1): 145-148.

• 研究论文 • 上一篇    下一篇

日本曲霉产生的黑麦酮酸F对玉米的化感作用

曾任森, 骆世明, 施月红   

  1. 华南农业大学热带亚热带生态研究所, 广州, 510642
  • 收稿日期:2003-01-21 修回日期:2003-07-02 出版日期:2004-01-15
  • 通讯作者: 曾任森,男,1965年8月生,博士,副教授,从事植物化学生态学研究.在国内外刊物上发表论文30多篇,其中4篇被SCI收录.E-mail:rszeng@scau.edu.cn.
  • 基金资助:
    国家自然科学基金(30270230);广东省自然科学基金(990682);广东省科技计划项目(2002C20506);中国科学院昆明植物研究所植物化学重点实验室基金资助项目

Allelopathic effects of secalonic acid F produced by Aspergillus japonicus on Zea mays

ZENG Rensen, LUO Shiming, SHI Yuehong   

  1. Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou 510642, China
  • Received:2003-01-21 Revised:2003-07-02 Online:2004-01-15

摘要: 日本曲霉(Aspergillus japonicus)是土壤和谷物种子表面的一种常见真菌.研究结果表明,日本曲霉所产生的大量黑麦酮酸F(SAF)对玉米(Zea mays)有很强的化感作用,低浓度显著促进玉米幼苗生长,高浓度则抑制.在0.0375mmol·L-1SAF下,玉米幼苗根长增长31.7%,根数量增加13.2%,根活力提高4.73倍,并促进玉米对P、K、Ca、Mg、S等5种营养元素的吸收.高浓度SAF(0.3mmol·L-1)下玉米根活力受抑制(72.1%),根对N、P、K、Ca、Mg、Fe等营养元素的吸收也受抑制.0.6mmol·L-1的SAF下根完全失去活力.电镜观察表明,有SAF的情况下玉米叶绿体片层结构模糊、混乱,双层膜不完整.

Abstract: Aspergillus japonicus Saito is a common soil-borne fungus, and exists on the surface of some cereal crop seeds. Secalonic acid F (SAF) abstract is the main allelochemical from the fungus. Bioassays showed that SAF significantly stimulated the seedling growth of corn (Zea mays L.) abstract at a concentration of 0.0375 mmol稬-1. The root length, root numbers and root oxidation activities increased by 31.7%, 13.2%, and 373%, respectively. Secalonic acid F also increased the nutrient absorption of P, K, Ca, Mg, and S at the same concentration. However, SAF inhibited the seedling growth of corn at concentrations of 0.3 mmol稬-1 and 0.6 mmol稬-1. The root length, root dry weight, and shoot length were inhibited by 27.7%, 39.1% and 35.8% by 0.3 mmol稬-1 of SAF, and root activities were inhibited by 72.1% and 100% by 0.3 mmol稬-1 and 0.6 mmol稬-1 of SAF, respectively. The nutrient absorption of N, P, K, Ca, Mg and Fe was reduced when the corn seedlings were treated with 0.3 mmol稬-1 SAF. Transmission electron microscope observations showed that the corn treated with 0.3 mmol稬-1 of SAF had a swelling and disorderly arrangement chloroplast, and the stratiform structure of chloroplast became unconspicuous.

中图分类号: