The role of piscidic acid secreted by pigeonpea roots grown in an Alfisol with low-P fertility

Ae, N and Arihara, J and Okada, K and Yoshihara, T and Otani, T and Johansen, C (2010) The role of piscidic acid secreted by pigeonpea roots grown in an Alfisol with low-P fertility. In: Genetic Aspects of Plant Mineral Nutrition. Developments in Plant and Soil Sciences book series (DPSS, volume 50) . Springer, pp. 279-288. ISBN 978-94-010-4721-0

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Abstract

In India, pigeonpea (Cajanus cajan (L.) Millsp.) has been traditionally grown as an intercrop, mainly with cereals such as sorghum (Sorghum bicolor (L.) Moench) and pearl millet (Pennisetum americanum (L.) Leeke) under low inputs of fertilizers. The response of pigeonpea to applied phosphorus (P) is generally low even in low-P Alfisols where a major fraction of inorganic P is in the iron-associated form (Fe-P). Pigeonpea has a special ability to take up P from low-P Alfisols on which other crops (sorghum, maize (Zea mays L.), soybean (Glycine max (L.) Merrill), and pearl millet) cannot survive. This characteristic is attributed to piscidic acid and its derivative, which is secreted from the roots of pigeonpea, but not by those of the other crop species. These substances can release P from Fe-P by chelating Fe3+. From results of both the composition of mineral contents and the growth stimulated by the inoculation of VAM fungi we propose a mechanism of P acquisition by pigeonpea from an Alfisol.

Item Type: Book Section
Divisions: UNSPECIFIED
CRP: UNSPECIFIED
Series Name: Developments in Plant and Soil Sciences book series (DPSS, volume 50)
Uncontrolled Keywords: alfisol, iron phosphate, phosphorus uptake, pigeonpea, piscidic acid, root exudate, sorghum, vertisol
Subjects: Others > Soil Fertility
Others > Soil
Mandate crops > Pigeonpea
Depositing User: Mr Ramesh K
Date Deposited: 27 Aug 2018 04:45
Last Modified: 27 Aug 2018 04:45
URI: http://oar.icrisat.org/id/eprint/10840
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