Biological activity of soil organic matter mobilized by root exudates

被引：67

作者：

Nardi, S

Sessi, E

Pizzeghello, D

Sturaro, A

Rella, R

Parvoli, G

机构：

[1] Univ Padua, Dipartimento Biotecnol Agr, I-35020 Padua, Italy

[2] CNR, Serv Prevenz & Protez, I-38127 Padua, Italy

来源：

CHEMOSPHERE | 2002年 / 46卷 / 07期

关键词：

organic acids; Pinus sylvestris; Picea abies; auxin- and gibberellin-like activities; gas chromatographic/mass spectrometric; measurements; dissolved organic matter;

D O I：

10.1016/S0045-6535(01)00160-6

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In order to study the biological activity of soil organic matter mobilized by agrarian (Zea mays : cultivars Mytos and Samantha) and forest (Picea abies Karst. and Pinus sylvestris L.) root exudates, two different soils, an Eutric Cambisol (EC) and a Rendzic Leptosol (RL), were considered. Soil organic matter extracts were obtained by treating the soils with water (control) or plant root exudates. The extracts were characterized by hormone-like activities and gas chromatographic/mass spectrometric (GC/MS) measurements. Their effects on the nitrogen metabolism in maize seedlings were evaluated. The nitrogen organification in the maize seedlings has been greatly stimulated by all the organic acid extracts from the agrarian soil, while the extracts from the forest soil had no influence upon the metabolism; this indicated a probable link between the plant and the environment. The different biological activities of the extracts are discussed. (C) 2002 Published by Elsevier Science Ltd.

引用

页码：1075 / 1081

页数：7

共 34 条

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