Plant Growth Promoting Rhizobacteria (PGPR) Reduces Application Rates of Fertilizers in Chili (Capsicum frutescens L.) Cultivation

Batool, Saneya; Altaf, Muhammad Ahsan

doi:10.4172/2376-0354.1000215

Cited by 8 publications

(3 citation statements)

References 16 publications

(25 reference statements)

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“…The first season showed that application of both isolates resulted in a decline in wheat yield when P levels fell below 50%, however, a significant increase in wheat yield was observed when P levels reached or exceeded 50% P. This resonates with previous research findings on tomato, chilli, and wheat regarding optimal fertilizer-use efficiency using PGPR that suggested a 75% fertilizer level precedes PGPR performance stability deterioration [ 22 , 29 , 30 ], albeit using a PGPR consortium. During the second season, T19 exhibited its capacity to enhance wheat yield, while isolate T29 consistently reduced wheat yield across all levels of P. During the final season, both isolates increased wheat yield above 25% P, except for isolate T19 which demonstrated a significant decrease at 25% P and 100% P. This phenomenon emphasizes the context-dependent nature of PGPR performance, which can vary even among individual isolates.…”

Section: Discussionsupporting

confidence: 83%

“…Contextualizing our findings alongside the impact of soil phosphate (P i ) levels on the individual isolates sourced from the Breedt et al [ 23 ] consortium, it becomes evident that soil P i concentration plays a pivotal role in shaping the ability of these individual isolates to influence wheat yield. Studies by Wang et al [ 22 ], Adesemoye et al, [ 29 ], and Batool and Altaf [ 30 ] have similarly emphasized the importance of soil nutrient dynamics in modulating PGPR efficacy. This reinforces the need to consider soil P i levels as a critical factor in the design and execution of future PGPR optimization trials within wheat cultivation.…”

Section: Discussionmentioning

confidence: 99%

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Influence of Soil Phosphate on Rhizobacterial Performance in Affecting Wheat Yield

Breedt,

Korsten,

Gokul

2024

Curr Microbiol

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As a primary nutrient in agricultural soils, phosphorus plays a crucial but growth-limiting role for plants due to its complex interactions with various soil elements. This often results in excessive phosphorus fertilizer application, posing concerns for the environment. Agri-research has therefore shifted focus to increase fertilizer-use efficiency and minimize environmental impact by leveraging plant growth-promoting rhizobacteria. This study aimed to evaluate the in-field incremental effect of inorganic phosphate concentration (up to 50 kg/ha/P) on the ability of two rhizobacterial isolates, Lysinibacillus sphaericus (T19), Paenibacillus alvei (T29), from the previous Breedt et al. (Ann Appl Biol 171:229–236, 2017) study on maize in enhancing the yield of commercially grown Duzi® cultivar wheat. Results obtained from three seasons of field trials revealed a significant relationship between soil phosphate concentration and the isolates’ effectiveness in improving wheat yield. Rhizospheric samples collected at flowering during the third season, specifically to assess phosphatase enzyme activity at the different soil phosphate levels, demonstrated a significant decrease in soil phosphatase activity when the phosphorus rate reached 75% for both isolates. Furthermore, in vitro assessments of inorganic phosphate solubilization by both isolates at five increments of tricalcium phosphate-amended Pikovskaya media found that only isolate T19 was capable of solubilizing tricalcium at concentrations exceeding 3 mg/ml. The current study demonstrates the substantial influence of inorganic phosphate on the performance of individual rhizobacterial isolates, highlighting that this is an essential consideration when optimizing these isolates to increase wheat yield in commercial cultivation.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Influence of Soil Phosphate on Rhizobacterial Performance in Affecting Wheat Yield

Breedt,

Korsten,

Gokul

2024

Curr Microbiol

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“…and optimizing the chili production. Microorganisms that naturally associated with plant roots or better known as PGPR can improve growth and control plant diseases (Batool & Altaf, 2017).…”

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confidence: 99%

Characterization of Plant Growth Promoting Rhizobacteria (PGPR) on Capcissum annum

et al. 2021

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Plant Growth Promoting Bacteria Rhizobacteria (PGPR) is one of the potential bacteria to enhance of Capsicum annuum through inhabitation the growth of pathogenic fungi. This study aimed to characterize PGPR in chili plants (Capsicum annuum). PGPR was isolated from the soil habitat of the red chili plant in Cilegon, Indonesia. Screening was then carried out with the dual culture method on Petri dishes and tested through in vivo method on the red chili plant. The selected bacteria were characterized morphologically, biochemically, and physiologically. The results revealed that there were 14 single isolates of bacteria from the roots of the red chili plants. The five single bacterial isolates, namely Azostobacter, Azospirillum, Pseudomonas, Serratia, and Beijerinckia have good potential as PGPR based on multiple culture screening by producing clear zones and positively effect the growth of chili plants.

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Plant–microbe–soil fertility interaction impacts performance of a Bacillus‐containing bioproduct on bell pepper

Ping

Kloepper

2019

J Basic Microbiol

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Limited information is available on the performance of plant growth‐promoting inoculants or bioproducts under different soil nutritional or fertility conditions. Consequently, the objective of this study was to evaluate the effects of a commercially available Bacillus‐containing bioproduct, Microlife Abundance, at concentrations of 5.5 and 6.5 log cfu/ml on early growth, fertilizer use–efficiency, and fruit yield of bell pepper (Capsicum annuum L.) under two different soil fertility conditions (25% and 100% recommended N rates). Two pot experiments were conducted with bell pepper: (a) a 4‐week‐long early growth test with inoculant treatments applied once at transplanting; and (b) a 13‐week‐long yield test with inoculant treatments applied at transplanting and again at first blossom‐set. Results from the early growth test indicated that at both N fertilization levels, applying Abundance once at transplanting at 6.5 log cfu/ml rather than 5.5 log cfu/ml significantly increased root dry weight, total root length, root volume, root surface area, and total length of very fine roots compared with the noninoculated control by 20%, 13%, 17%, 15%, and 12%, respectively. In contrast to the early growth, results from the yield test showed that only at the 100% recommended N rate, applying Abundance twice at both concentrations significantly enhanced N fertilizer use–efficiency and marketable yield of bell pepper over the noninoculated control by 34% (5.5 log cfu/ml) and 30% (6.5 log cfu/ml). Therefore, the efficacy of the Bacillus‐containing bioproduct Abundance in enhancing fertilizer use–efficiency and marketable yield of bell pepper varied between soil nutritional conditions, but the early growth promotion effect of Abundance did not. Our results also demonstrate that selected microbial‐based bioproducts, like Abundance, can be compatible with chemical fertilizers to enhance fertilizer use–efficiency and crop yields, but cannot be used as complete substitutes for chemical fertilizers.

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Plant Growth Promoting Rhizobacteria (PGPR) Reduces Application Rates of Fertilizers in Chili (Capsicum frutescens L.) Cultivation

Cited by 8 publications

References 16 publications

Influence of Soil Phosphate on Rhizobacterial Performance in Affecting Wheat Yield

Influence of Soil Phosphate on Rhizobacterial Performance in Affecting Wheat Yield

Characterization of Plant Growth Promoting Rhizobacteria (PGPR) on Capcissum annum

Plant–microbe–soil fertility interaction impacts performance of a Bacillus‐containing bioproduct on bell pepper

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