Bacterial indole-3-acetic acid influences soil nitrogen acquisition in barley and chickpea
| Autor: | Martin Buck, Shraddha Gang, Sheetal Sharma, Meenu Saraf, Jörg Schumacher |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine chemistry.chemical_element Plant Science engineering.material root architecture Nitrate reductase 01 natural sciences Article nitrogen use efficiency 03 medical and health sciences chemistry.chemical_compound Nitrate ROOT Klebsiella USE EFFICIENCY TRITICUM-AESTIVUM FIXATION nitrogen utilization efficiency Microbial inoculant Ecology Evolution Behavior and Systematics GROWTH-PROMOTING RHIZOBACTERIA REDUCTASE-ACTIVITY Science & Technology Ecology Plant Sciences AZOSPIRILLUM Botany food and beverages INOCULATION indole acetic acid Nitrogen TRANSPORT Horticulture 030104 developmental biology chemistry QK1-989 Nitrogen fixation engineering Diazotroph Fertilizer Indole-3-acetic acid nitrogen uptake efficiency Life Sciences & Biomedicine 010606 plant biology & botany NITRATE |
| Zdroj: | Plants Volume 10 Issue 4 Plants, Vol 10, Iss 780, p 780 (2021) |
| Popis: | Farming of barley and chickpea is nitrogen (N) fertilizer dependent. Using strategies that increase the nitrogen use efficiency (NUE) and its components, nitrogen uptake efficiency (NUpE) and nitrogen utilization efficiency (NUtE) would reduce the N fertilizer application in the soil and its adverse environmental effects. We evaluated the effects of three different strains of diazotroph Klebsiella (K.p. SSN1, K.q. SGM81, and K.o. M5a1) to understand the role of biological nitrogen fixation (BNF) and bacterial indole-3-acetic acid (IAA) on NUE of the plants. A field study revealed that K.p. SSN1 results in profound increment of root surface area by eightfold and threefold compared to uninoculated (control) in barley and chickpea, respectively. We measured significant increase in the plant tissue nitrogen, chlorophyll content, protein content, nitrate reductase activity, and nitrate concentration in the inoculated plants (p ≤ 0.05). Treated barley and chickpea exhibited higher NUE and the components compared to the control plants (K.p. SSN1 ≥ K.q. SGM81> K.o. M5a1). Specifically, K.q. SGM81 treatment in barley increased NUpE by 72%, while in chickpea, K.p. SSN1 increased it by 187%. The substantial improvement in the NUpE and NUE by the auxin producers K.p. SSN1 and K.q. SGM81 compared with non-auxin producer K.o. M5a1 was accompanied by an augmented root architecture suggesting larger contribution of IAA over marginal contribution of BNF in nitrogen acquisition from the soil. |
| Databáze: | OpenAIRE |
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