Growth-promoting effect of chloro-substituted aliphatic acids in root nodule bacteria
✍ Scribed by Jensen, H. L. ;Schr�der, Minna
- Book ID
- 104760783
- Publisher
- Springer-Verlag
- Year
- 1967
- Weight
- 370 KB
- Volume
- 58
- Category
- Article
- ISSN
- 0003-9276
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✦ Synopsis
Trichloro-, dichloro-and monochloroacetie and e-dichloro-, ccmonochloro-and fl-monochloropropionic acids as sodium salts in 0.10--1.0 nazi concentration accelerated the growth of a strain of t~hizobium leguminosarum in a liquid synthetic medium with biotin as sole accessory growth factor. The strongest effect was shown by fi-monoehlOropropionate. Concentrations of 10 m~ and above were inhibitory, a-Monochlorobutyrate did not accelerate growth.
Ca-pan~othenate and its precursor fl-alanine strongly improved growth in concentrations of 0.10 to 1.0 p.p.m. (0.001--0.011 m~r fl-alanine) and masked the effect of the chloro-substituted organic acids which seemed to function as more or less inferior substitntes for fl-alanine.
The effect of fi-alanine was approximately ten times greater than that of fl-monochloropropionate which possibly owed its relatively strong activity to its close structure analogy with #-alanine.
Two other strains of rhizobia showed a moderate response to trichloroacetate