ORGANIC-ACIDS IN THE RHIZOSPHERE OF BANKSIA-INTEGRIFOLIA LF

被引：115

作者：

GRIERSON, PF

机构：

[1] School of Botany, University of Melbourne, Parkville, 3052, Victoria

来源：

PLANT AND SOIL | 1992年 / 144卷 / 02期

关键词：

CITRIC ACID; GC; HPLC; PROTEOID ROOTS; RHIZOSPHERE; ROOT EXUDATES;

D O I：

10.1007/BF00012883

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Water leachates of the proteoid root layer of a mature stand of Banksia integrifolia were analysed for low molecular weight (LMW) organic acids by GC, HPLC and colorimetric techniques. Large amounts of organic acids (2500-mu-g in 100 mL of leachate) were found in the proteoid root layer compared to the surrounding soil and leaf litter (approximately 230-mu-g in 100 mL of leachate). Citric acid represented approximately 50% of the total organic acids leached, malic acid approximately 18%, and aconitic acid constituted approximately 17%. Concentration of citric acid in the proteoid root layer may enhance the availability of phosphorus for plant uptake.

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页码：259 / 265

页数：7

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