Acid phosphatase role in chickpea/maize intercropping

Annals of Botany
S M LiC Tang

Abstract

Organic P comprises 30-80 % of the total P in most agricultural soils. It has been proven that chickpea facilitates P uptake from an organic P source by intercropped wheat. In this study, acid phosphatase excreted from chickpea roots is quantified and the contribution of acid phosphatase to the facilitation of P uptake by intercropped maize receiving phytate is examined. For the first experiment using hydroponics, maize (Zea mays 'Zhongdan No. 2') and chickpea (Cicer arietinum 'Sona') were grown in either the same or separate containers, and P was supplied as phytate, KH2PO4 at 0.25 mmol P L(-1), or not at all. The second experiment involved soil culture with three types of root separation between the two species: (1) plastic sheet, (2) nylon mesh, and (3) no barrier. Maize plants were grown in one compartment and chickpea in the other. Phosphorus was supplied as phytate, Ca(H2PO4)2 at 50 mg P kg(-1), or no P added. In the hydroponics study, the total P uptake by intercropped maize supplied with phytate was 2.1-fold greater than when it was grown as a monoculture. In the soil experiment, when supplied with phytate, total P uptake by maize with mesh barrier and without root barrier was 2.2 and 1.5 times, respectively, as much as...Continue Reading

Citations

Jun 27, 2007·Proceedings of the National Academy of Sciences of the United States of America·Long LiFu-Suo Zhang
Jul 23, 2014·Journal of Integrative Plant Biology·Jianna XieHong Liao
Oct 31, 2017·Frontiers in Plant Science·Grace Z H TanSagadevan G Mundree
Jan 11, 2020·Frontiers in Microbiology·Ming LangJunling Zhang

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