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  • 1
    Online Resource
    Online Resource
    Draft Genome Sequence of Paenibacillus sonchi IIRRBNF1, a Nitrogen-Fixing and Plant Growth-Promoting Bacterium Isolated from Rice Rhizosphere
    American Society for Microbiology ; 2022
    In:  Microbiology Resource Announcements Vol. 11, No. 5 ( 2022-05-19)
    Details
    In: Microbiology Resource Announcements, American Society for Microbiology, Vol. 11, No. 5 ( 2022-05-19)
    Abstract: Paenibacillus sonchi IIRRBNF1 is a rice-rhizospheric, endospore-forming, Gram-positive, plant growth-promoting rhizobacterium. Here, we report the draft genome sequence of Paenibacillus sonchi IIRRBNF1, which consists of an∼7.3-Mb (7,323,556-bp) genome with 6,271 coding sequences (CDSs), 13 rRNAs, and 67 tRNAs. The genome reveals the presence of a nitrogen-fixing gene cluster and genes associated with multiple plant growth-promoting traits.
    Type of Medium: Online Resource
    ISSN: 2576-098X
    URL: Article
    DOI: 10.1128/mra.00126-22
    Language: English
    Publisher: American Society for Microbiology
    Publication Date: 2022
    detail.hit.zdb_id: 2968655-6
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  • 2
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    Online Resource
    PGPR improve physiological and yield attributes in mustard under different regimes of water supply
    Informa UK Limited ; 2023
    In:  Archives of Agronomy and Soil Science Vol. 69, No. 9 ( 2023-07-29), p. 1482-1493
    Details
    In: Archives of Agronomy and Soil Science, Informa UK Limited, Vol. 69, No. 9 ( 2023-07-29), p. 1482-1493
    Type of Medium: Online Resource
    ISSN: 0365-0340 , 1476-3567
    URL: Article
    DOI: 10.1080/03650340.2022.2099540
    RVK:
    ZA 2233
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2023
    detail.hit.zdb_id: 2068377-7
    detail.hit.zdb_id: 121282-5
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  • 3
    Online Resource
    Online Resource
    Data_Sheet_1.docx
    Frontiers Media SA ; 2023
    In:  Frontiers in Microbiology Vol. 14 ( 2023-7-13)
    Details
    In: Frontiers in Microbiology, Frontiers Media SA, Vol. 14 ( 2023-7-13)
    Abstract: Heat stress caused due to increasing warming climate has become a severe threat to global food production including rice. Silicon plays a major role in improving growth and productivity of rice by aiding in alleviating heat stress in rice. Soil silicon is only sparingly available to the crops can be made available by silicate solubilizing and plant-growth-promoting bacteria that possess the capacity to solubilize insoluble silicates can increase the availability of soluble silicates in the soil. In addition, plant growth promoting bacteria are known to enhance the tolerance to abiotic stresses of plants, by affecting the biochemical and physiological characteristics of plants. The present study is intended to understand the role of beneficial bacteria viz. Rhizobium sp. IIRR N1 a silicate solublizer and Gluconacetobacter diazotrophicus , a plant growth promoting bacteria and their interaction with insoluble silicate sources on morpho-physiological and molecular attributes of rice ( Oryza sativa L.) seedlings after exposure to heat stress in a controlled hydroponic system. Joint inoculation of silicates and both the bacteria increased silicon content in rice tissue, root and shoot biomass, significantly increased the antioxidant enzyme activities (viz. superoxidase dismutase, catalase and ascorbate peroxidase) compared to other treatments with sole application of either silicon or bacteria. The physiological traits (viz. chlorophyll content, relative water content) were also found to be significantly enhanced in presence of silicates and both the bacteria after exposure to heat stress conditions. Expression profiling of shoot and root tissues of rice seedlings revealed that seedlings grown in the presence of silicates and both the bacteria exhibited higher expression of heat shock proteins (HSPs viz., OsHsp90 , OsHsp100 and 60 kDa chaperonin ), hormone-related genes ( OsIAA6 ) and silicon transporters ( OsLsi1 and OsLsi2 ) as compared to seedlings treated with either silicates or with the bacteria alone. The results thus reveal the interactive effect of combined application of silicates along with bacteria Rhizobium sp. IIRR N1, G. diazotrophicus inoculation not only led to augmented silicon uptake by rice seedlings but also influenced the plant biomass and elicited higher expression of HSPs, hormone-related and silicon transporter genes leading to improved tolerance of seedling to heat stress.
    Type of Medium: Online Resource
    ISSN: 1664-302X
    URL: Article
    URL: Article
    DOI: 10.3389/fmicb.2023.1168415
    DOI: 10.3389/fmicb.2023.1168415.s001
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2023
    detail.hit.zdb_id: 2587354-4
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  • 4
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    Online Resource
    Sustainable Intensification of a Rice–Maize System through Conservation Agriculture to Enhance System Productivity in Southern India
    MDPI AG ; 2022
    In:  Plants Vol. 11, No. 9 ( 2022-05-01), p. 1229-
    Details
    In: Plants, MDPI AG, Vol. 11, No. 9 ( 2022-05-01), p. 1229-
    Abstract: Integrated management of rice–maize systems is an emerging challenge in southern India due to improper rice residues and tillage management in maize crops. Conservation agriculture (CA) practices such as a reduced tillage and maintaining stubble mulch may hold the potential to increase yields, reduce crop establishment costs and increase farm incomes. A five-year trial was performed to study the effect of different CA and establishment methods in rice on system productivity, profitability, and soil carbon status in a rice–maize system. In the rainy season, the trial consisted of two main treatments: (i) normal manual transplanting and (ii) direct-wet seeding, and three sub-main treatments at different sowing dates with fifteen day intervals. In addition, in the winter season, two tillage treatments (conventional and minimum tillage) were imposed over the rainy season treatments. Both rice and maize were grown under irrigated conditions. The results showed that sowing times at 15 day intervals did not impact the yield significantly. Transplanted rice obtained a significantly higher grain yield during the first four years, but in the last year, the yield was similar in both of the establishment methods. In the winter season, conventional tilled maize recorded a higher cob yield than under the minimum tilled treatment, except for the last year, where both the tillage treatment effects were the same. System productivity of CA-based minimum tilled rice–maize was inferior during the first three years but was superior to the conventionally tilled method in the fourth and fifth year. Pooled analysis revealed that the conventionally tilled rice–maize system resulted in a similar system productivity as that of the CA during the study period. The cost–benefit analysis revealed that transplanted rice and conventionally tilled maize fetched higher net returns of INR 111,074 and INR 101,658/ha, respectively, over the direct-wet seeded rice and CA. In addition, the 15 July rice sown followed by the maize system led to an increase in irrigation water productivity by 15.7%, and the total water (irrigation + rainfall) productivity by 27.1% in the maize crop compared with the 30 July sown system. The CA-based rice–maize system resulted in a significantly higher very labile (0.194%) and labile (0.196%) carbon concentration at a 0–5 cm depth of soil compared to those under the conventional system. Thus, CA can be recommended for southern India and similar agro-ecological tropic and sub-tropic conditions. This system can be followed with appropriate location-specific modification in South-Asian countries, where crop yields and soil health are declining as a result of continuous cereal–cereal crop rotation.
    Type of Medium: Online Resource
    ISSN: 2223-7747
    URL: Article
    DOI: 10.3390/plants11091229
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2704341-1
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  • 5
    Online Resource
    Online Resource
    Table_9.xlsx
    Frontiers Media SA ; 2022
    In:  Frontiers in Plant Science Vol. 13 ( 2022-11-18)
    Details
    In: Frontiers in Plant Science, Frontiers Media SA, Vol. 13 ( 2022-11-18)
    Abstract: Understanding the beneficial plant–microbe interactions is becoming extremely critical for deploying microbes imparting plant fitness and achieving sustainability in agriculture. Diazotrophic bacteria have the unique ability to survive without external sources of nitrogen and simultaneously promote host plant growth, but the mechanisms of endophytic interaction in cereals and legumes have not been studied extensively. We have studied the early interaction of two diazotrophic bacteria, Gluconacetobacter diazotrophicus (GAB) and Bradyrhizobium japonicum (BRH), in 15-day-old seedlings of rice and soybean up to 120 h after inoculation (hai) under low-nitrogen medium. Root colonization of GAB in rice was higher than that of BRH, and BRH colonization was higher in soybean roots as observed from the scanning electron microscopy at 120 hai. Peroxidase enzyme was significantly higher at 24 hai but thereafter was reduced sharply in soybean and gradually in rice. The roots of rice and soybean inoculated with GAB and BRH harvested from five time points were pooled, and transcriptome analysis was executed along with control. Two pathways, “Plant pathogen interaction” and “MAPK signaling,” were specific to Rice- Gluconacetobacter (RG), whereas the pathways related to nitrogen metabolism and plant hormone signaling were specific to Rice- Bradyrhizobium (RB) in rice. Comparative transcriptome analysis of the root tissues revealed that several plant–diazotroph-specific differentially expressed genes (DEGs) and metabolic pathways of plant–diazotroph-specific transcripts, viz. , chitinase, brassinosteroid, auxin, Myeloblastosis (MYB), nodulin, and nitrate transporter (NRT), were common in all plant–diazotroph combinations; three transcripts, viz. , nitrate transport accessory protein (NAR), thaumatin, and thionin, were exclusive in rice and another three transcripts, viz. , NAC (NAM: no apical meristem, ATAF: Arabidopsis thaliana activating factor, and CUC: cup-shaped cotyledon), ABA (abscisic acid), and ammonium transporter, were exclusive in soybean. Differential expression of these transcripts and reduction in pathogenesis-related (PR) protein expression show the early interaction. Based on the interaction, it can be inferred that the compatibility of rice and soybean is more with GAB and BRH, respectively. We propose that rice is unable to identify the diazotroph as a beneficial microorganism or a pathogen from an early response. So, it expressed the hypersensitivity-related transcripts along with PR proteins. The molecular mechanism of diazotrophic associations of GAB and BRH with rice vis-à-vis soybean will shed light on the basic understanding of host responses to beneficial microorganisms.
    Type of Medium: Online Resource
    ISSN: 1664-462X
    URL: Article
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    DOI: 10.3389/fpls.2022.939395
    DOI: 10.3389/fpls.2022.939395.s001
    DOI: 10.3389/fpls.2022.939395.s002
    DOI: 10.3389/fpls.2022.939395.s003
    DOI: 10.3389/fpls.2022.939395.s004
    DOI: 10.3389/fpls.2022.939395.s005
    DOI: 10.3389/fpls.2022.939395.s006
    DOI: 10.3389/fpls.2022.939395.s007
    DOI: 10.3389/fpls.2022.939395.s008
    DOI: 10.3389/fpls.2022.939395.s009
    DOI: 10.3389/fpls.2022.939395.s010
    DOI: 10.3389/fpls.2022.939395.s011
    DOI: 10.3389/fpls.2022.939395.s012
    DOI: 10.3389/fpls.2022.939395.s013
    DOI: 10.3389/fpls.2022.939395.s014
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2022
    detail.hit.zdb_id: 2687947-5
    detail.hit.zdb_id: 2613694-6
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  • 6
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    Plant Growth-Promoting Potential of Entomopathogenic Fungus Metarhizium pinghaense AAUBC-M26 under Elevated Salt Stress in Tomato
    MDPI AG ; 2023
    In:  Agronomy Vol. 13, No. 6 ( 2023-06-11), p. 1577-
    Details
    In: Agronomy, MDPI AG, Vol. 13, No. 6 ( 2023-06-11), p. 1577-
    Abstract: Entomopathogenic fungi Metarhizium species are generally employed to manage the soil-dwelling stage of insect pests, and are known for their rhizocompetency property. Since this fungus is typically recommended for use in soil, it could potentially be investigated as a bioinoculant to reduce abiotic stress, such as salinity, along with improved plant growth promotion. Salt stress tolerance potential of native Metarhizium isolates was evaluated based on mycelial fresh weight, dry weight, and spore yield. All the isolates were found to tolerate NaCl concentrations (50 mM, 100 mM, 150 mM, 200 mM, 250 mM, and 300 mM) supplemented in the culture medium. Metarhizium anisopliae (AAUBC-M15) and Metarhizium pinghaense (AAUBC-M26) were found to be effective at tolerating NaCl stress up to 200 mM NaCl. These two isolates were analyzed in vitro for plant growth-promoting traits at elevated salt concentrations (100 and 200 mM NaCl). No significant effect on IAA production was reported with the isolate M. pinghaense (AAUBC-M26) (39.16 µg/mL) or in combination with isolate M. anisopliae (AAUBC-M15) (40.17 µg/mL) at 100 mM NaCl (38.55 µg/mL). The salinity stress of 100 mM and 200 mM NaCl had a significant influence on the phosphate solubilization activity, except in the co-inoculation treatment at 100 mM NaCl. The isolates were positive for ACC deaminase enzyme activity. An increase in salt concentration was accompanied by a steady and significant increase in chitinase enzyme activity. Total phenolics (149.3 µg/mL) and flavonoids (79.20 µg/mL) were significantly higher in the culture filtrate of Metarhizium isolates at 100 mM NaCl, and gradual decline was documented at 200 mM NaCl. M. pinghaense (AAUBC-M26) proved to be promising in reducing the salt stress in tomato seedlings during the nursery stage. In the pot culture experiment, the treatment comprising soil application + seedling root dip + foliar spray resulted in improved growth parameters of the tomato plant under salt stress. This study shows that Metarhizium, a fungus well known for controlling biotic stress brought on by insect pests, can also help plants cope with abiotic stress, such as salinity.
    Type of Medium: Online Resource
    ISSN: 2073-4395
    URL: Article
    DOI: 10.3390/agronomy13061577
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2607043-1
    SSG: 23
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  • 7
    Online Resource
    Online Resource
    Effect of Nitrogen-fixing Bacteria on Germination, Seedling Vigour and Growth of Two Rice (Oryza sativa L.) Cultivars
    Sciencedomain International ; 2022
    In:  International Journal of Plant & Soil Science ( 2022-04-27), p. 94-106
    Details
    In: International Journal of Plant & Soil Science, Sciencedomain International, ( 2022-04-27), p. 94-106
    Abstract: To evaluate the effect of isolated nitrogen fixing plant growth-promoting bacteria (PGPB) on seed germination and growth promotion of rice cultivars (cv. BPT 5204 and Improved Samba Mahsuri). Eight promising N-fixing PGPB along with two standard cultures (viz. B. japonicum and G. diazotrophicus) were inoculated as seed treatment to rice genotypes and the effect on seed germination, seed vigour index and plant growth promotion of rice cultivars was assessed under in vitro (agar method) and in vivo (pot experiment) net house conditions. PGPBs (viz., Paenibacillus sonchi IIRRBNF1, Paenibacillus sp. IIRRNF2, Ochrobactrum sp. IIRRNF3, Burkholderia cepacia IIRRNF4, Burkholderia sp. IIRRNF5, Stenotrophomonas sp. IIRRNF6, Rhizobium sp. IIRRNF7 and Xanthomonas sacchari IIRRNF8) were enhanced seed germination, seed vigour index, seedling growth and dry matter accumulation (root and shoot dry matter) of rice cultivars under in vitro as well as in vivo conditions. Among all PGPB, Paenibacillus sonchi IIRRBNF1 exhibited the highest ability to stimulate plant growth promotion under both the conditions. The eight PGPB isolates exhibited positive influence on seed germination indices as well as growth promotion traits of rice cultivars at seedling stage and can be further evaluated at different growth stages under pot and field experiment.
    Type of Medium: Online Resource
    ISSN: 2320-7035
    URL: Article
    DOI: 10.9734/ijpss/2022/v34i1631028
    Language: Unknown
    Publisher: Sciencedomain International
    Publication Date: 2022
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  • 8
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    Plant growth‐promoting rhizobacteria Shewanella putrefaciens and Cronobacter dublinensis enhance drought tolerance of pearl millet by modulating hormones and stress‐responsive genes
    Wiley ; 2022
    In:  Physiologia Plantarum Vol. 174, No. 2 ( 2022-03)
    Details
    In: Physiologia Plantarum, Wiley, Vol. 174, No. 2 ( 2022-03)
    Abstract: Drought is a major abiotic stress that affects crop productivity. Endophytic bacteria have been found to alleviate the adverse effects of drought on plants. In the present study, we evaluated the effects of two endophytic bacteria Shewanella putrefaciens strain MCL‐1 and Cronobacter dublinensis strain MKS‐1 on pearl millet ( Pennisetum glaucum (L.) R. Br.) under drought stress conditions. Pearl millet plants were grown under three water levels: field capacity (FC), mild drought stress (MD), and severe drought stress (SD). The effects of inoculation on plant growth, physiological attributes, phytohormone content, and drought stress‐responsive genes were assessed. The inoculation of pearl millet seeds with endophytes significantly improved shoot and root dry weight and root architecture of plants grown under FC and drought stress conditions. There was a significant increase in relative water content and proline accumulation in the inoculated plants. Among the phytohormones analyzed, the content of ABA and IAA was significantly higher in endophyte‐treated plants under all moisture regimes than in uninoculated plants. C. dublinensis ‐inoculated plants had higher GA content than uninoculated plants under all moisture regimes. The expression level of genes involved in phytohormone biosynthesis ( SbNCED , SbGA20oX , and SbYUC ) and coding drought‐responsive transcription factors ( SbAP2 , SbSNAC1 and PgDREB2A ) was significantly higher under SD in endophyte‐inoculated plants than in uninoculated plants. Thus, these endophytic bacteria presumably enhanced the tolerance of pearl millet to drought stress by modulating root growth, plant hormones, physiology and the expression of genes involved in drought tolerance.
    Type of Medium: Online Resource
    ISSN: 0031-9317 , 1399-3054
    URL: Issue
    URL: Article
    DOI: 10.1111/ppl.v174.2
    DOI: 10.1111/ppl.13676
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 208872-1
    detail.hit.zdb_id: 2020837-6
    SSG: 12
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