Effects of Plant Growth Promoting Rhizobacteria (PGPRs) on the Biological Nitrogen Fixation, Nodulation, and Growth of Lupinus albus l. cv. Multolupa
The effects of five plant growth promoting rhizobacteria on the biological nitrogen fixation (BNF), nodulation, and growth promotion of plants of Lupinus albus cv. Multolupa were investigated. The plants were selected for their capacity to use 1‐aminocyclopropane‐1‐carboxylic acid (ACC) as the sole...
Saved in:
Published in | Engineering in life sciences Vol. 4; no. 1; pp. 71 - 77 |
---|---|
Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
05.02.2004
WILEY‐VCH Verlag Wiley-VCH |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The effects of five plant growth promoting rhizobacteria on the biological nitrogen fixation (BNF), nodulation, and growth promotion of plants of Lupinus albus cv. Multolupa were investigated. The plants were selected for their capacity to use 1‐aminocyclopropane‐1‐carboxylic acid (ACC) as the sole source of nitrogen. Four strains belonged to the genus Pseudomonas (Luc 1, Luc 2, Luc 3, and Luc 4) and one (Luc 5) belonged to the genus Bacillus. Three patterns of inoculation were examined. In the first pattern, PGPRs were inoculated seven days before being inoculated with B. japonicum. In the second pattern, PGPRs and B. japonicum were co‐inoculated, and in the last pattern, PGPRs were inoculated seven days after being inoculated with B. japonicum. The plants were sampled 30 and 45 days after being inoculated with B. japonicum (T1 and T2). In the first pattern of inoculation, Luc 5 significantly increased the biological nitrogen fixation compared to the control at the first sampling time, as did Luc 1 and Luc 4 at the second sampling time. In the second pattern of inoculation, Luc 5 negatively effected the biological nitrogen fixation at both sampling times. In the third pattern of inoculation, all PGPRs caused a decrease in the nitrogen content of the plants compared to the control. The results obtained according to the patterns of inoculation showed that the mechanisms of action of the effects and routes used by Gram‐negative and Gram‐positive strains were clearly different. Competition between PGPRs and B. japonicum, competition for the niches in the rhizoplane, production of auxins, and induction of systemic resistance (ISR) by the production of siderophores or by lipopolysaccharides present in the outer membrane (LPS) are discussed as probable reasons for the effects observed.
The effects of five plant growth promoting rhizobacteria on the biological nitrogen fixation, nodulation, and growth promotion of plants of Lupinus albus cv. Multolupa were investigated. The plants were selected for their capacity to use 1‐aminocyclopropane‐1‐carboxylic acid as the sole source of nitrogen. Probable reasons for the clearly different effects and routes used by Gram‐negative and Gram‐positive strains for the patterns of inoculation are discussed. |
---|---|
Bibliography: | istex:347F51A8C62443B0A1390FD050A8A6C6FAA8AA93 ark:/67375/WNG-DL15VQBT-C ArticleID:ELSC200400013 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 1618-0240 1618-2863 |
DOI: | 10.1002/elsc.200400013 |