Plant growth‐promoting rhizobacteria Shewanella putrefaciens and Cronobacter dublinensis enhance drought tolerance of pearl millet by modulating hormones and stress‐responsive genes

Journal: Physiologia Plantarum, published 1 Mar 2022
DOI: 10.1111/ppl.13676
PubMed: PMID 35316540 · Cited in PubMed: 31 articles

Citation figures are shown for reference only. They are not used to judge whether a study is standalone or a follow-up.

Assessment

Rule-based score: Unclear (follow-up index 53/100, see the score card)

Score card

Calculated by fixed rules from the data on this page. Each line shows what earned the points. Citation counts are not used.

Follow-up index

53/100

Unclear, following the group's own earlier work

55+ follow-up · 25 or less standalone · in between unclear

+27	Similar earlier article by the same group 40% keyword match: Evaluation of Endophytic Bacteria for their Influence on Plant Growth and Seed Germination under Water Stress Conditions (2017)
+15	Cites earlier studies by its own authors 9 studies
+11	Self-citations by ORCID iD 9 of 82 references (11%)
+0	Continuation wording none
+0	Very similar earlier article by another group 20% keyword match: THE EXPRESSION OF SELECTED DROUGHT RESPONSIVE GENES OF MAIZE IS INFLUENCED BY ENDOPHYTIC BACTERIAL INOCULATION (2020)

Impact

27/100

Overall = 35% scientific advancement + 25% economic / commercial + 15% human resource development + 25% technologies & techniques

Scientific advancement34

mentions “significant” · mentions “improve” · novelty (100 − follow-up index) × 0.3 = +14
Economic / commercial30

mentions “product” · mentions “crop”
Human resource development28

no matching terms · 6 institutions, 14 authors = +28
Technologies & techniques15

1 × 15: chemical synthesis

Keywords used for the assessment (20)

System studied

Pennisetum
Rhizobacteria
Pearl

Technologies & techniques

chemical synthesis

Topic

drought tolerance
pearl millet
endophytic bacteria
Shewanella putrefaciens
Cronobacter dublinensis
plant growth-promoting rhizobacteria
phytohormone production
abscisic acid
indole-3-acetic acid
gibberellin
proline accumulation
DREB2A
9-cis-epoxycarotenoid dioxygenase
gibberellin 20-oxidase
root architecture
seed inoculation

Self-citations

9 of 82 references (11%) share an ORCID iD with this article's authors. 9 share an author by any match. 8 of 14 authors have an ORCID iD.

Sangeeta Paul: 8
Nagarajan Nivetha: 2
Viswanathan Chinnusamy: 2
Ajinath Shridhar Dukare: 2
Gopinathan Kumar Krishna: 1

Cited earlier studies by the same authors

Works in this article's reference list that share at least one author.

Amelioration of short‐term drought stress during different growth stages in Brassica juncea by rhizobacteria mediated maintenance of ROS homeostasis (2021)
Shared authors: Arambam Devi Asha, Nagarajan Nivetha, Gopinathan Kumar Krishna, Viswanathan Chinnusamy, Sangeeta Paul · DOI · PubMed
Diversity and Tissue Preference of Osmotolerant Bacterial Endophytes Associated with Pearl Millet Genotypes Having Differential Drought Susceptibilities (2018)
Shared authors: Sangeeta Paul, Chetana Aggarwal, Sonth Bandeppa, Ajinath Shridhar Dukare · DOI · PubMed
Antioxidant, physiological and biochemical responses of drought susceptible and drought tolerant mustard (Brassica juncea L) genotypes to rhizobacterial inoculation under water deficit stress (2019)
Shared authors: Sonth Bandeppa, Sangeeta Paul, Chetana Aggarwal · DOI · PubMed
Characterization of osmotolerant rhizobacteria for plant growth promoting activities in vitro and during plant-microbe association under osmotic stress (2018)
Shared authors: Sangeeta Paul, Chetana Aggarwal
Standardization and Validation of a LC-Method for Quantification of Indole-3-Acetic Acid in Rice Genotypes (2018)
Shared authors: Suchitra Pushkar, Viswanathan Chinnusamy · DOI
Plant Growth-Promoting Rhizobacteria for Abiotic Stress Alleviation in Crops (2017)
Shared authors: Sangeeta Paul, Ajinath Shridhar Dukare · DOI
Evaluation of Endophytic Bacteria for their Influence on Plant Growth and Seed Germination under Water Stress Conditions (2017)
Shared authors: Nagarajan Nivetha, Sangeeta Paul · DOI
Assessment of the Osmotolerant Endophytic Bacteria from Mustard and Nagphani for their Plant Growth Promoting activities under Osmotic stress (2018)
Shared authors: Sangeeta Paul · DOI
Interactive effect with AM fungi and Azotobacter inoculated seed on germination, plant growth and yield in cotton (Gossypium hirsutum) (2011)
Shared authors: Sangeeta Paul · DOI

Authors

ORCID iDs as recorded in OpenAlex.

Booragamakalapalli Subbarayappa Manjunatha no ORCID
Nagarajan Nivetha ORCID 0000-0001-5577-7923
Indian Agricultural Research Institute
Gopinathan Kumar Krishna ORCID 0000-0002-8851-0042
Narsee Monjee Institute of Management Studies
Allimuthu Elangovan ORCID 0000-0001-7889-5762
Indian Agricultural Research Institute
Suchitra Pushkar no ORCID
Indian Agricultural Research Institute
Narayanappa Chandrashekar no ORCID
Central Institute for Cotton Research
Chetana Aggarwal no ORCID
National Research Centre on Plant Biotechnology
Arambam Devi Asha no ORCID
Indian Agricultural Research Institute
Viswanathan Chinnusamy ORCID 0000-0003-2174-9064
Indian Agricultural Research Institute
Ritesh Kumar Raipuria ORCID 0000-0002-5127-6459
National Research Centre on Plant Biotechnology
Anshul Watts ORCID 0000-0003-1014-5302
National Research Centre on Plant Biotechnology
Sonth Bandeppa no ORCID
Indian Institute of Rice Research
Ajinath Shridhar Dukare ORCID 0000-0002-6488-4920
ICAR - Central Institute for Research on Cotton Technology
Sangeeta Paul ORCID 0000-0003-3103-7159
Indian Agricultural Research Institute

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.

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