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Isolated Phosphate-Solubilizing Soil Bacteria Promotes In vitro Growth of Solanum tuberosum L.

GUSTAVO YAÑEZ-OCAMPO

GUSTAVO YAÑEZ-OCAMPO

Laboratory of Edaphology and Environment, Faculty of Sciences, Autonomous University of the State of MexicoToluca, Mexico
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YAÑEZ-OCAMPO, GUSTAVO
, 
MARTHA E. MORA-HERRERA

MARTHA E. MORA-HERRERA

Tenancingo Universitary Center, Autonomous University of the State of MexicoToluca, Mexico
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MORA-HERRERA, MARTHA E.
, 
ARNOLDO WONG-VILLARREAL

ARNOLDO WONG-VILLARREAL

Agrifood Division, Technological University of the ForestOcosingo, Chiapas, Mexico
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WONG-VILLARREAL, ARNOLDO
, 
DENISSE M. DE LA PAZ-OSORIO

DENISSE M. DE LA PAZ-OSORIO

Laboratory of Edaphology and Environment, Faculty of Sciences, Autonomous University of the State of MexicoToluca, Mexico
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DE LA PAZ-OSORIO, DENISSE M.
, 
NADIA DE LA PORTILLA-LÓPEZ

NADIA DE LA PORTILLA-LÓPEZ

Laboratory of Edaphology and Environment, Faculty of Sciences, Autonomous University of the State of MexicoToluca, Mexico
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DE LA PORTILLA-LÓPEZ, NADIA
, 
JORGE LUGO

JORGE LUGO

Laboratory of Edaphology and Environment, Faculty of Sciences, Autonomous University of the State of MexicoToluca, Mexico
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LUGO, JORGE
, 
ROCIO VACA-PAULÍN

ROCIO VACA-PAULÍN

Laboratory of Edaphology and Environment, Faculty of Sciences, Autonomous University of the State of MexicoToluca, Mexico
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VACA-PAULÍN, ROCIO
 und 
PEDRO DEL ÁGUILA

PEDRO DEL ÁGUILA

Laboratory of Edaphology and Environment, Faculty of Sciences, Autonomous University of the State of MexicoToluca, Mexico
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DEL ÁGUILA, PEDRO
  
08. Sept. 2020
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Artikel-Kategorie: original-paper
Online veröffentlicht: 08. Sept. 2020
Seitenbereich: 357 - 365
Eingereicht: 04. Juni 2020
Akzeptiert: 15. Aug. 2020
DOI: https://doi.org/10.33073/pjm-2020-039
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© 2020 Gustavo Yañez-Ocampo et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1.

Phosphate solubilization assay, measured by halo formation by four bacterial strains cultured on PVK agar. The lines above each bar indicate standard deviation. The different letters above the bars denote statistical differences (LSD test (p < 0.001)).
Phosphate solubilization assay, measured by halo formation by four bacterial strains cultured on PVK agar. The lines above each bar indicate standard deviation. The different letters above the bars denote statistical differences (LSD test (p < 0.001)).

Fig. 2.

Kinetics of the bacterial growth on PVK liquid medium.a) the bacterial growth measured as optical density at a wavelength of 600 nm, b) the orthophosphates released measured with molybdenum blue method, and c) the acidification evidence (lower pH values) in PVK liquid medium. The lines shown above or below each point indicate the standard deviation.
Kinetics of the bacterial growth on PVK liquid medium.a) the bacterial growth measured as optical density at a wavelength of 600 nm, b) the orthophosphates released measured with molybdenum blue method, and c) the acidification evidence (lower pH values) in PVK liquid medium. The lines shown above or below each point indicate the standard deviation.

Fig. 3.

Phylogenetic tree of A3 bacterial strain identified by 16 S rDNA molecular analysis.
Phylogenetic tree of A3 bacterial strain identified by 16 S rDNA molecular analysis.

Fig. 4.

Development of adventitious roots in potato microplants (Solanum tuberosum L.) cv. Citlali, inoculated with PSB strain A3 and cultured for 28 d ± 2 d.
Development of adventitious roots in potato microplants (Solanum tuberosum L.) cv. Citlali, inoculated with PSB strain A3 and cultured for 28 d ± 2 d.

Potato microplants (Solanum tuberosum L_) cv_ Citlali grown for 28 ± 2 d in vitro in presence/absence of PSB strain A3_

TreatmentsStem length (cm)Root length (cm)Fresh weight (g)
Bacterial strain A3 added  10.043 ± 3.252*  2.943 ± 1.634*  0.573 ± 0.296*
Without added bacterial strain A35.6 ± 2.0264.297 ± 3.1360.174 ± 0.161

Growth evaluation of potato microplants cv_ Citlali with different P sources and sucrose concentrations_

Variable
Phosphate (A)Sucrose g/l (B)Interaction
KH2PO4 (T0, T1)Ca3(PO4)2 (T4, T5)  10 (T1, T5)  30 (T0, T4)AB
1*6.081 ± 0.154¤b6.801 ± 0.155a6.122 ± 0.153b6.760 ± 0.156aNo
215.099 ± 0.640NS16.180 ± 0.636NS14.335 ± 0.632b16.944 ± 0.644aNo
30.279 ± 0.093NS0.334 ± 0.094NS0.240 ± 0.0195b0.373 ± 0.0198aPresent
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