L-Tryptophan-dependent biosynthesis of indole-3-acetic acid (IAA) improves plant growth and colonization of maize by Burkholderia phytofirmans PsJN
By Muhammad Naveed, M. A. Qureshi, Z. Zahir, M. Hussain, A. Sessitsch, Birgit Mitter. Annals of Microbiology, 2014
105 citations recorded by the source corpus.
Burkholderia phytofirmans PsJN is a well-known plant growth-promoting bacterium that establishes rhizospheric and endophytic colonization in different plants. PsJN inoculation promotes growth of different horticultural crops. L-Tryptophan (L-TRP) application may further improve its effectiveness, due to substrate (L-TRP)-dependent inoculum (PsJN)-derived auxins in the rhizosphere. In the present study, the substrate (L-TRP)-dependent response of PsJN inoculation to maize growth and auxin biosynthesis was evaluated under pot conditions. In vitro auxin biosynthesis by PsJN was determined in the absence and presence of L-TRP, a physiological precursor of auxins. Surface-disinfected seeds were treated with peat-based inoculum and L-TRP solutions (10−4 and 10−5 M). Results revealed that L-TRP application and PsJN inoculation, when applied separately, significantly increased the growth parameters of maize compared to untreated control. However, PsJN inoculation supplemented with L-TRP (10−5 M) gave the most promising results and significantly increased plant height, photosynthesis, chlorophyll content, root biomass and shoot biomass up to 18, 16, 45, 62 and 55 %, respectively, compared to the uninoculated control. Similarly, higher values of N, P and IAA content were observed with precursor (L-TRP)–inoculum (PsJN) interaction. The inoculant strain efficiently colonized maize seedlings and was recovered from the rhizosphere, root and shoot of plants. The results imply that substrate (L-TRP)-derived IAA biosynthesis in the rhizosphere by PsJN inoculation could be a useful approach for improving the growth, photosynthesis and nutrient content of maize plants.
Subfields: Plant Science
View Paper: https://www.semanticscholar.org/paper/02180d62ba611c5f2b18fd000b372641270fb1c5
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In Plant Science
- Ahmad Nawaz
- Muhammad Naveed
- Muhammad Farooq
- L. Ozturk
- V. Stanys
- A. Wahid
- Kadambot H. M. Siddique
- S. M. A. Basra
Citations in the corpus
- Pseudomonas-aided zinc application improves the productivity and biofortification of bread wheat (2018, background): “PGPR increase plant growth by multiple mechanisms, most probably by modulation of phytohormone and nutrient solubilisation and uptake (Dobbelaere et al. 2003; Naveed et al. 2015).”
- Bacterial endophytes in agricultural crops and their role in stress tolerance: a review (2015, background): “, 2001) and indole acetic acid (IAA) (Naveed et al., 2015).”