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Cited by 85Plant-Microbe Interactions and ImmunityPlant Stress Responses and ToleranceLegume Nitrogen Fixing Symbiosis

Salt-tolerant plant growth-promoting bacteria enhanced salinity tolerance of salt-tolerant alfalfa (Medicago sativa L.) cultivars at high salinity

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Ansari, Mohammad, Shekari, Farid, Mohammadi, Mohammad Hossein, Juhos, Katalin, Végvári, György, Biró, Borbála·2019·Acta Physiologiae Plantarum
DOI 10.1007/s11738-019-2988-5
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Abstract

Alfalfa (Medicago sativa L.) plant growth decreases when cultivated under salinity or irrigated with salty water. Inoculation with plant growth-promoting bacteria (PGPB) is a method for mitigating the harmful effects of salinity on plants growth. To investigate salt-tolerant PGPB with salt-tolerant and salt-sensitive alfalfa cultivar interactions under salinity, some physiological and agronomical aspects were investigated. The inoculated plants of alfalfa cultivars with Hartmannibacter. diazotrophicus and Pseudomonas sp. bacteria were compared with non-inoculated plants. Plants were grown in growth room and irrigated with tap water until 6–7 weeks, and then, salinity stress imposed by irrigating with tap water (control), 10 dS m−1 and 20 dS m−1 NaCl. Salinity reduced relative water content (RWC), membrane stability index (MSI), K+, photosynthesis rate (Pn) and stomatal conductance (gs), leaf number, height, and dry weight, and increased sodium in all cultivars. Inoculation of cultivars with both PGPB mitigated the negative effects of salinity on plants growth by increasing the root length and weight, nodule number, chlorophyll pigments, RWC, MSI, Pn, and gs. Chlorophyll pigments, plant height and leaf number, Na+, K+/Na+, and nodule number improved more pronounced through inoculating with Pseudomonas sp., whereas K+, carotenoids, and RWC improved more pronounced through H. diazotrophicus under salinity. The results showed inoculation with two bacteria improved growth performance in salt-tolerant and salt-sensitive cultivars under 10 dS m−1, but at high salinity (20 dS m−1), inoculation was successful only in salt-tolerant alfalfa cultivars.

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  • Greater Mg absorption correlates with increased chlorophyll content in plants inoculated with A. brasilense.

    “Ansari et al. [56] point out that greater Mg absorption correlates with increased chlorophyll content in plants inoculated with A. brasilense.”

    From Azospirillum brasilense affects survival, growth and nutrient status of micropropagated sugarcane (Saccharum spp.) plantlets during ex vitro conditions (2025) · cites this paper as [56]

    The Discussion (page unavailable) says higher chlorophyll pigment content in inoculated plants was related to greater magnesium absorption. It does not make that association specifically for A. brasilense; the study’s chlorophyll results concern alfalfa inoculated with Pseudomonas sp. or H. diazotrophicus. (LLM, conf=0.87)

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Research works printed but not linked: 7

  1. Arora NK, Tewari S, Singh S, Lal N, Maheshwari DK (2012) PGPR for protection of plant health under saline conditions. Bacte- ria in agrobiology: stress management. Springer, Berlin, pp 239-258
  2. Baset M, Shamsuddin ZH, Wahab Z, Marziah M (2010) Effect of plant growth promoting rhizobacterial (PGPR) inoculation on growth and nitrogen incorporation of tissue-cultured 'Musa' plantlets under nitrogen-free hydroponics condition. Aust J Crop Sci 4(2):85
  3. Gupta G, Parihar SS, Ahirwar NK, Snehi SK, Singh V (2015) Plant growth promoting rhizobacteria (PGPR): current and future pros- pects for development of sustainable agriculture. J Microb Bio- chem Technol. 7(2):096-102
  4. Han HS, Lee KD (2005) Plant growth promoting rhizobacteria effect on antioxidant status, photosynthesis, mineral uptake and growth of lettuce under soil salinity. Res J Agric Biol Sci. 1(3):210-215
  5. Jaleel CA, Sankar B, Sridharan R, Panneerselvam R (2008) Soil salin- ity alters growth, chlorophyll content, and secondary metabolite accumulation in Catharanthus roseus. Turkish J Biol 32(2):79-83
  6. Torabi M, Halim RA, Choukan R (2014) Physiological adaptation of alfalfa genotypes to salt stress (one of deleterious impacts of cli- mate change). Science, policy and politics of modern agricultural system. Springer, Dordrecht, pp 181-194
  7. Werner D, Newton WE (eds) (2005) Nitrogen fixation in agriculture, forestry, ecology, and the environment, vol 4. Springer Science & Business Media, New York

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Authors
Ansari, M., Shekari, F., Mohammadi, M. H., Juhos, K., Végvári, G., & Biró, B.
Affiliations
  • Magyar Agrár- és Élettudományi Egyetem (HU)
  • University of Zanjan (IR)
  • University of Tehran (IR)
Corresponding author
  • Shekari, Farid
  • Végvári, György
ORCID
Venue
Acta Physiologiae Plantarum
Publisher
Springer Science and Business Media LLC
Published
2019-11-27
Volume
41
Issue
12
ISSN
  • 0137-5881 (ISSN-L)
  • 1861-1664
DOI
10.1007/s11738-019-2988-5
OpenAlex
W2990167354
Cited by
85
References
47
Citations by year
2026: 6 · 2025: 11 · 2024: 15 · 2023: 19 · 2022: 17 · 2021: 10 · 2020: 7
FWCI
6.27
Type
journal article
Language
en
Open access
Licence
Locations
Acta Physiologiae Plantarum (publishedVersion, cc-by)
Funders
  • University of Zanjan
  • Szent István Egyetem
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant-Microbe Interactions and Immunity
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Stress Responses and Tolerance
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Legume Nitrogen Fixing Symbiosis
Keywords
alfalfa, salt stress, salt-tolerant cultivars, plant growth-promoting bacteria, Pseudomonas, bacterial inoculation, root nodulation, relative water content, membrane stability index, photosynthesis, stomatal conductance, sodium accumulation, Na+/K+ ratio, chlorophyll, cultivar tolerance

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