Evaluating the Effects of Different Acidic Conditions on the Plant Growth-Promoting Rhizobacteria (PGPR) Activity of Phosphate-Solubilising Bacteria | Chapter 3 | Agricultural Sciences: Techniques and Innovations Vol. 3

One of the primary challenges in Indonesian marginal soil is the limited availability of macronutrients, particularly nitrogen and phosphate (P). Soil P plays an important role in plant growth and soil fertility. The acidity of the soil influences the amount of phosphorus available in the soil; acidic soils have low phosphorus availability. The phosphorus fixation reaction is pH-dependent. The use of phosphorus-solubilising bacteria improves phosphorus availability in acidic soils. The production of dissolved phosphorus and organic acids is one of the functions of the plant growth-promoting rhizobacteria (PGPR) activity of phosphorus-solubilising bacteria. The purpose of this study was to examine how acidity affects the organic acid production and dissolved phosphorus levels of phosphate-solubilising bacteria (PSB). Experiments were carried out in the Laboratory of Soil Biology, Department of Soil and Land Resources, Faculty of Agriculture, Universitas Padjadjaran. Two isolates of PGPR (Burkholderia sp. strain WK 11 and Burkholderia sp. strain MQ-14W) were used in this study, both of which were isolated from an acidic soil ecosystem. The pH 4.5, normal pH (7) and 10.5 were the levels of acidity. The result showed that the pH of the media had a significant effect on dissolved P in the media after being incubated for 7 days. The results revealed that the acidity of the water had an effect on the amount of dissolved phosphorus and the amount of organic acid produced by the phosphate-solubilising bacteria. PSB produced more organic acid (lactic, citric, oxalic, and tartaric acid) and dissolved phosphorus at pH 4.5 than at pH 7 or pH 10.5. The mechanism of phosphate solubilization by bacteria is related to their ability to produce organic acids. Each bacterium has a genetically different ability to produce organic acids, both in the amount and organic matter. The amount and organic matter are important in determining the high dissolution of P.

 

Author(s) Details

 Betty Natalie Fitriatin
Department of Soil Sciences and Land Resouces Management, Agriculture Faculty, Universitas Padjadjaran, Indonesia.

 

Detty Asna Fauziah
Agrotechnology, Agriculture Faculty, Universitas Padjadjaran, Indonesia.

 

Reginawanti Hindersah
Department of Soil Sciences and Land Resouces Management, Agriculture Faculty, Universitas Padjadjaran, Indonesia.

 

Tualar Simarmata
Department of Soil Sciences and Land Resouces Management, Agriculture Faculty, Universitas Padjadjaran, Indonesia.

 

Please see the book here:- https://doi.org/10.9734/bpi/asti/v3/5710

 

The Effect of Organic Acids Produced by Phosphate Solubilizing Microbes on Phosphorus Solubilization | Chapter 5 | Novel Aspects on Chemistry and Biochemistry Vol. 1

 The shift of phosphorus in the soil is aided by the activity of the phosphate solubilizing bacteria. These microbes have the skill to dissolve established P in the soil. The mechanism that plays a function for the phosphorus solubilization  is the production of various types of organic acids by phosphate solubilizing bacteria. This difference is affected by two factors, namely the support constant of basic acid complex compounds with ions, and the building of the hydroxyl and carboxyl molecules in the main element chain. By increasing the basic acids produced by phosphate solubilizing bacteria, it will be followed for one formation of organic chelate, because the bound P becomes separated. The reaction that happens due to the binding process between natural acids and various Al phosphate and Fe phosphate ions The talent of each organic acid to chelate the ion further varies. Each bacteria produces different quality and capacity of organic acids. This study aims to decide the relationship 'tween the  organic acids secreted by PSM to planet seen at dawn solubilization seen through highest in rank regression shaping that connects 'tween the two variables The relationship 'tween the type and amount of organic acid and planet seen at dawn solubilization still needs to be intentional. This study showed that there was a beneficial correlation 'tween the organic acids created by phosphate solubilizing microbes (Burkholderia/ Pseudomonas, Bacillus and Aspergillus) and phosphorus solubilization.

Author(s) Details:

Betty Natalie Fitriatin,
Department of Soil Science and Land Resource, Faculty of Agriculture, Universitas Padjadjaran, Jatinangor, Sumedang-45363, West Java, Indonesia.

Nadia Nuraniya Kamaluddin,
Department of Soil Science and Land Resource, Faculty of Agriculture, Universitas Padjadjaran, Jatinangor, Sumedang-45363, West Java, Indonesia.

Diyan Herdiyantoro,
Department of Soil Science and Land Resource, Faculty of Agriculture, Universitas Padjadjaran, Jatinangor, Sumedang-45363, West Java, Indonesia.

Livia Adila,
Agrotechnology, Faculty of Agriculture, Universitas Padjadjaran, Jatinangor, Sumedang-45363, West Java, Indonesia.

Please see the link here: https://stm.bookpi.org/NACB-V1/article/view/10246

Determining the Function of Roots of Tea Plant (Camellia sinensis) Cultured by a Novel Form of Hydroponics and Soil Acidification| Chapter 9 | Research Highlights in Agricultural Sciences Vol. 5

 To interrogate the physiological function of beverage plant (Camellia sinensis)  roots, an unique means of hydroponic culture was secondhand. During culture, the pH of the fiber solution with an energetically developing beverage plant fell. Furthermore, no oxalic acid, tartaric acid, malic acid, or citric acid, all of that might contribute to acidification, were in the direction of a growing plant's digestive solution. Recent overuse of nitrate-holding fertilisers has resulted in acridness of the soil near beverage fields, which has led to loud noises, and this has grown into a important issue. A proton pump prevention prevented the fluid from acidifying. Soil acidification grant permission have been hurried by a proton released selectively from ammoniacal nitrogen for progress, implying the unique means of the tea plant as a working food.

Author(s) Details:

Kieko Saito,
Institute for Environmental Sciences, University of Shizuoka, Shizuoka, Japan.

Masahiko Ikeda,
Graduate School of Environment and Disaster Research, Tokoha University, Shizuoka, Japan.

Please see the link here: https://stm.bookpi.org/RHAS-V5/article/view/8827