Enhancing the atrazine tolerance of Pennisetum americanum (L.) K. Schum by inoculating with indole-3-acetic acid producing strain Pseudomonas chlororaphis PAS18

2020 ◽  
Vol 202 ◽  
pp. 110854
Author(s):  
Zhao Jiang ◽  
Duo Jiang ◽  
Qihang Zhou ◽  
Zhi Zheng ◽  
Bo Cao ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Pseudomonas Chlororaphis ◽  
Pennisetum Americanum ◽  
Indole 3 Acetic Acid

Production of Indole-3-Acetic Acid in the Plant-Beneficial Strain Pseudomonas chlororaphis O6 Is Negatively Regulated by the Global Sensor Kinase GacS

2006 ◽  
Vol 52 (6) ◽  
pp. 473-476 ◽  
Author(s):  
Beom Ryong Kang ◽  
Kwang Yeol Yang ◽  
Baik Ho Cho ◽  
Tae Ho Han ◽  
In Seon Kim ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Sensor Kinase ◽  
Pseudomonas Chlororaphis ◽  
Indole 3 Acetic Acid

scholarly journals Production of Indole-3-Acetic Acid via the Indole-3-Acetamide Pathway in the Plant-Beneficial Bacterium Pseudomonas chlororaphis O6 Is Inhibited by ZnO Nanoparticles but Enhanced by CuO Nanoparticles

2011 ◽  
Vol 78 (5) ◽  
pp. 1404-1410 ◽  
Author(s):  
Christian O. Dimkpa ◽  
Jia Zeng ◽  
Joan E. McLean ◽  
David W. Britt ◽  
Jixun Zhan ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Zno Nanoparticles ◽  
Pseudomonas Chlororaphis ◽  
Transcript Accumulation ◽  
Ion Release ◽  
Zno Nps ◽  
Content Type ◽  
Iaa Production ◽  
Beneficial Bacterium ◽  
Indole 3 Acetic Acid

ABSTRACTThe beneficial bacteriumPseudomonas chlororaphisO6 produces indole-3-acetic acid (IAA), a plant growth regulator. However, the pathway involved in IAA production in this bacterium has not been reported. In this paper we describe the involvement of the indole-3-acetamide (IAM) pathway in IAA production inP. chlororaphisO6 and the effects of CuO and ZnO nanoparticles (NPs). Sublethal levels of CuO and ZnO NPs differentially affected the levels of IAA secreted in medium containing tryptophan as the precursor. After 15 h of growth, CuO NP-exposed cells had metabolized more tryptophan than the control and ZnO NP-challenged cells. The CuO NP-treated cells produced higher IAA levels than control cultures lacking NPs. In contrast, ZnO NPs inhibited IAA production. Mixing of CuO and ZnO NPs resulted in an intermediate level of IAA production relative to the levels in the separate CuO and ZnO NP treatments. The effect of CuO NPs on IAA levels could be duplicated by ions at the concentrations released from the NPs. However, ion release did not account for the inhibition caused by the ZnO NPs. The mechanism underlying changes in IAA levels cannot be accounted for by effects on transcript accumulation from genes encoding a tryptophan permease or the IAM hydrolase in 15-h cultures. These findings raise the issue of whether sublethal doses of NPs would modify the beneficial effects of association between plants and bacteria.

Evaluation of Kinetic Parameters at the Transport of Indole-3-acetic Acid Through Bulk Liquid Membranes

2017 ◽  
Vol 68 (5) ◽  
pp. 903-907
Author(s):  
Ecaterina Anca Serban ◽  
Ioana Diaconu ◽  
Elena Ruse ◽  
Georgiana Ileana Badea ◽  
Adriana Cuciureanu ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Kinetic Parameters ◽  
Trioctylphosphine Oxide ◽  
Bulk Liquid ◽  
Transport Parameters ◽  
Kinetics Parameters ◽  
First Order ◽  
Phase Concentration ◽  
Feed Phase ◽  
Indole 3 Acetic Acid

Indole-3-acetic acid is a growth phytohormone considered the most important representative of auxin class. This paper presents the assessment of some kinetic parameters in the process of transport of indole-3-acetic acid taking into consideration the kinetic model of consecutive irreversible first order reactions. It was pursued the influence upon the process of parameters such as: feed phase concentration, stripping phase concentration in the presence of two type carriers: tributyl phosphate (TBP) and trioctylphosphine oxide (TOPO). Depending on these transport parameters were calculated kinetics parameters such as: pseudo-first-order apparent membrane entrance and exit rate constants, the maximum flux at the entrance and exit out of the membrane. The highest values of the transport flux is obtained in the presence of carrier trioctylphosphine oxide (TOPO) at the concentration in the feed phase of 10-4 mol/L indole-3-acetic acid and a concentration of 10--2mol/L NaOH in the stripping phase.

Production of Indole-3-Acetic Acid by Cyanobacterial Strains

2017 ◽  
Vol 7 (2) ◽  
pp. 112-120 ◽  
Author(s):  
Nazia Ahmad ◽  
Tasneem Fatma
Keyword(s):  
Acetic Acid ◽  
Indole 3 Acetic Acid
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