Bioengineering of Dioscorea nipponica with rhizospheric Proteus spp. for enhanced tuber size and diosgenin content

Jimtha, John C.; Mathew, Jyothis; Radhakrishnan, E. K.

doi:10.1007/s13205-017-0886-3

Cited by 7 publications

(4 citation statements)

References 29 publications

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“…Previously, it has been demonstrated that P. rhodesiae GRC140 promotes the growth of A. thaliana seedlings, being the main effects observed at the root system and the length of hypocotyl, which in turn increases the total fresh weight in plantlets ). This agrees with other studies that demonstrated that P. rhodesiae strains promote the growth of Solanum lycopersicum (Romero et al 2016), C. aconitifolius, Phaseolus vulgaris, and Bacopa monnieri (Jimtha and Radhakrishnan 2018). The beneficial effects described for some P. rhodesiae strains have been mainly observed at the level of the root system, increasing the length of the primary root, and promoting secondary roots generation.…”

Section: P Rhodesiae Grc140 Negatively Affects the Growth Of C Sativus L Seedlingssupporting

confidence: 92%

“…The beneficial effects described for some P. rhodesiae strains have been mainly observed at the level of the root system, increasing the length of the primary root, and promoting secondary roots generation. Article Because of this, the effects of P. rhodesiae strains have been attributed to IAA produced by the bacterium (Romero et al 2016, Jimtha and Radhakrishnan 2018.…”

Section: P Rhodesiae Grc140 Negatively Affects the Growth Of C Sativus L Seedlingsmentioning

confidence: 99%

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Effect of Pseudomonas rhodesiae GRC140 on Cucumis sativus L. seedlings with and without Cadmium

Rolón-Cárdenas

Morales

Arvizu-Gómez

et al. 2020

JNAS

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Pseudomonas rhodesiae GRC140 is an endophytic bacterium isolated from the roots of Typha latifolia collected in a Cd-contaminated site. This bacterium has biochemical abilities similar to those exerted by plant growth-promoting rhizobacteria. Moreover, it has been shown that P. rhodesiae GRC140 improves the growth of Arabidopsis thaliana seedlings in the absence and presence of Cd. The aim of this work was to determine the effect of P. rhodesiae GRC140 in Cucumis sativus L. growing in nutritive medium with and without Cd. For this, cucumber seeds were superficially disinfected and exposed to a suspension of P. rhodesiae GRC140. Inoculated seeds were placed in a nutritive medium with and without Cd, then were incubated at 28 oC for eight days. After incubation, seedlings were recovered and determined the length of the primary root, the number of roots per plant, hypocotyl length, and the fresh weight. The results showed that P. rhodesiae GRC140 negatively affects the growth of C. sativus L. seedlings grown in the absence of Cd. On the other hand, in Cd-exposed seedlings, P. rhodesiae GRC140 improves the growth of C. sativus L. These results suggest that P. rhodesiae GRC140 decreases the deleterious effect of Cd in C. sativus L.

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Section: P Rhodesiae Grc140 Negatively Affects the Growth Of C Sativus L Seedlingssupporting

confidence: 92%

Section: P Rhodesiae Grc140 Negatively Affects the Growth Of C Sativus L Seedlingsmentioning

confidence: 99%

Effect of Pseudomonas rhodesiae GRC140 on Cucumis sativus L. seedlings with and without Cadmium

Rolón-Cárdenas

Morales

Arvizu-Gómez

et al. 2020

JNAS

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“…Individual N 2 supplying capability of P. polymyxa, B. cereus, and Proteus sp. in association with cereal crops were also reported by Jimtha et al (2017) and Akintokun et al (2019). The potentiality of N 2 fixation by applied inoculant was reflected in the plant N uptake.…”

Section: Discussionmentioning

confidence: 59%

Bio-Organic Fertilizer: A Green Technology to Reduce Synthetic N and P Fertilizer for Rice Production

et al. 2021

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Decomposed organic materials, in combination with plant growth-promoting bacteria (PGPB), are environmentally friendly and reduce synthetic fertilizer use in rice production. A bio-organic fertilizer (BoF) was prepared using kitchen waste (79%), chita-dhan (unfilled rice grain) biochar (15%), rock phosphate (5%), and a consortium of 10 PGPB (1%) to supplement 30% nitrogen and to replace triple superphosphate (TSP) fertilizer in rice production with an improvement of soil health. PGPB were local isolates and identified using 16S ribosomal RNA partial gene sequences as Bacillus mycoides, Proteus sp., Bacillus cereus, Bacillus subtilis, Bacillus pumilus, Paenibacillus polymyxa, and Paenibacillus spp. Isolates could fix N2 by 0.7–1.4 g kg–1, solubilize 0.1–1.2 g kg–1 phosphate, and produce 0.1–40 g kg–1 indoleacetic acid. The performance of BoF was evaluated by 16 field experiments and 18 farmers’ field demonstration trials during the year 2017–2020 in different parts of Bangladesh. Performances of BoF were evaluated based on control (T1), full synthetic fertilizer dose of N, P, and K (T2), BoF (2 t ha–1) + 70% N as urea + 100% K as muriate of potash (T3), 70% N as urea + 100% P as TSP + 100% K as muriate of potash (T4), and 2 t ha–1 BoF (T5) treatments. At the research station, average grain yield improved by 10–13% in T3 compared with T2 treatment. Depending on seasons, higher agronomic N use efficiency (19–30%), physiological N use efficiency (8–18%), partial factor productivity (PFP)N (114–150%), recovery efficiency (RE)N (3–31%), N harvest index (HIN) (14–24%), agronomic P use efficiency (22–25%), partial factor productivity of P (9–12%), AREP (15–23%), and HIP (3–6%) were obtained in T3 compared with T2 treatment. Research results were reflected in farmers’ field, and significant (P < 0.05) higher plant height, tiller, panicle, grain yield, partial factor productivity of N and P were obtained in the same treatment. Application of BoF improved soil organic carbon by 6–13%, along with an increased number of PGPB as compared with full synthetic fertilizer dose. In conclusion, tested BoF can be considered as a green technology to reduce 30% synthetic N and 100% TSP requirements in rice production with improved soil health.

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“…Previous studies have reported the beneficial effects of inoculated bacteria on yam plants. The study of Jimtha et al (2017) reported that tuber size and root number of Dioscorea nipponica plants were improved after inoculation with Proteus spp. R6.…”

Section: Introductionmentioning

confidence: 99%

Replacement of water yam (Dioscorea alata L.) indigenous root endophytes and rhizosphere bacterial communities via inoculation with a synthetic bacterial community of dominant nitrogen-fixing bacteria

Liswadiratanakul

Yamamoto²,

Matsutani³

et al. 2023

Front. Microbiol.

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Biofertilizers containing high-density plant growth-promoting bacteria are gaining interest as a sustainable solution to environmental problems caused by eutrophication. However, owing to the limitations of current investigative techniques, the selected microorganisms are not always preferred by the host plant, preventing recruitment into the native microbiota or failing to induce plant growth-promoting effects. To address this, five nitrogen-fixing bacteria previously isolated from water yam (Dioscorea alata L.) plants and showing dominant abundance of 1% or more in the water yam microbiota were selected for analysis of their plant growth-promoting activities when used as a synthetic bacterial inoculant. Water yam cv. A-19 plants were inoculated twice at 10 and 12 weeks after planting under greenhouse conditions. Bacterial communities in root, rhizosphere, and bulk soil samples were characterized using high-throughput 16S rRNA amplicon sequencing. Compared with non-inoculated plants, all bacterial communities were significantly altered by inoculation, mainly at the genus level. The inoculation effects were apparently found in the root communities at 16 weeks after planting, with all inoculated genera showing dominance (in the top 35 genera) compared with the control samples. However, no significant differences in any of the growth parameters or nitrogen contents were observed between treatments. At 20 weeks after planting, the dominance of Stenotrophomonas in the inoculated roots decreased, indicating a decline in the inoculation effects. Interestingly, only the Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium clade was dominant (>1% relative abundance) across all samples, suggesting that bacteria related to this clade are essential core bacteria for water yam growth. This is the first report on addition of a synthetic nitrogen-fixing bacterial community in water yam plants showing that native bacterial communities can be replaced by a synthetic bacterial community, with declining in the effects of Stenotrophomonas on the modified communities several weeks after inoculation.

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Bioengineering of Dioscorea nipponica with rhizospheric Proteus spp. for enhanced tuber size and diosgenin content

Cited by 7 publications

References 29 publications

Effect of Pseudomonas rhodesiae GRC140 on Cucumis sativus L. seedlings with and without Cadmium

Effect of Pseudomonas rhodesiae GRC140 on Cucumis sativus L. seedlings with and without Cadmium

Bio-Organic Fertilizer: A Green Technology to Reduce Synthetic N and P Fertilizer for Rice Production

Replacement of water yam (Dioscorea alata L.) indigenous root endophytes and rhizosphere bacterial communities via inoculation with a synthetic bacterial community of dominant nitrogen-fixing bacteria

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