HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Yan, X. Articles by Beebe, S. E. Search for Related Content PubMed Articles by Yan, X. Articles by Beebe, S. E. Agricola Articles by Yan, X. Articles by Beebe, S. E.

Utilization of Phosphorus Substrates by Contrasting Common Bean Genotypes

Lab. of Plant Nutrition, South China Agric. Univ., Guangzhou 510642, China
Dep. of Horticulture, The Pennsylvania State Univ., University Park, PA 16802
Bean Program, International Center for Tropical Agriculture (CIAT), A.A. 6713, Cali, Colombia

^* Corresponding author (jlynch{at}psupen.psu.edu).

Phosphorus deficiency limits common bean (Phaseolus vulgaris L.) production in tropical soils, where P may be bound to recalcitrant organic matter, or with aluminum or iron oxides. In a previous study, we showed that P-efficient genotypes perform well in contrasting soils, suggesting that interactions with specific soil constituents did not account for genetic variation. To confirm this finding, a study was done to determine if contrasting bean genotypes differ in their ability to recover P from different P compounds. Six genotypes were planted in pots of silica sand in which P was supplied at four levels as KH₂PO₄, CaHPO₄, inositol hexaphosphoric acid (IP₆), FePO₄, or AIPO₄. Most results could be explained as a function of relative aqueous solubilities of the P sources. KH₂PO₄ gave the greatest uptake and growth and FePO₄ the least. No differences were observed in the ability of the six genotypes to acquire P from the Al, Fe, or IP₆ sources. Andean genotypes, especially the Peruvian landrace G19833, extracted more P from CaHPO₄ than Mesoamerican genotypes. G19833 was capable of acidifying the rhizosphere more than other genotypes. We conclude that (i) differential ability to mobilize P from Fe, Al, and organic ligands does not account for genetic variation in P efficiency, and (ii) Andean germplasm has superior ability to mobilize P from Ca sources, which may be useful in utilizing phosphate rock fertilizers.

Received for publication July 6, 1995.

This article has been cited by other articles:

				D. B. Myers, N. R. Kitchen, K. A. Sudduth, R. E. Sharp, and R. J. Miles Soybean Root Distribution Related to Claypan Soil Properties and Apparent Soil Electrical Conductivity Crop Sci., July 30, 2007; 47(4): 1498 - 1509. [Abstract] [Full Text] [PDF]

				I. E. Ochoa, M. W. Blair, and J. P. Lynch QTL Analysis of Adventitious Root Formation in Common Bean under Contrasting Phosphorus Availability Crop Sci., May 18, 2006; 46(4): 1609 - 1621. [Abstract] [Full Text] [PDF]