Gluconic acid production and phosphate solubilization by the plant growth-promoting bacterium Azospirillum spp.

被引：195

作者：

Rodriguez, H

Gonzalez, T

Goire, I

Bashan, Y

机构：

[1] Ctr Biol Res NW CIB, Environm Microbiol Grp, La PAz 23000, Baja Calif Sur, Mexico

[2] Cuban Res Inst Sugarcane Prod ICIDCA, Havana, Cuba

来源：

NATURWISSENSCHAFTEN | 2004年 / 91卷 / 11期

关键词：

D O I：

10.1007/s00114-004-0566-0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

In vitro gluconic acid formation and phosphate solubilization from sparingly soluble phosphorus sources by two strains of the plant growth-promoting bacteria A. brasilense (Cd and 8-I) and one strain of A. lipoferum JA4 were studied. Strains of A. brasilense were capable of producing gluconic acid when grown in sparingly soluble calcium phosphate medium when their usual fructose carbon source is amended with glucose. At the same time, there is a reduction in pH of the medium and release of soluble phosphate. To a greater extent, gluconic acid production and pH reduction were observed for A. lipoferum JA4. For the three strains, clearing halos were detected on solid medium plates with calcium phosphate. This is the first report of in vitro gluconic acid production and direct phosphate solubilization by A. brasilense and the first report of P solubilization by A. lipoferum. This adds to the very broad spectrum of plant growth-promoting abilities of this genus.

引用

页码：552 / 555

页数：4

共 24 条

[1] The effect of compatible and incompatible Azospirillum brasilense strains on proton efflux of intact wheat roots -: Azospirillum and proton efflux of wheat root [J].