Characterization of plant growth promoting traits of bacterial isolates from the rhizosphere of barley ( Hordeum vulgare L.) and tomato ( Solanum lycopersicon L.) grown under Fe sufficiency and deficiency

Scagliola, Marina; Pii, Youry; Mimmo, Tanja; Cesco, Stefano; Ricciuti, Patrizia; Crecchio, Carmine

doi:10.1016/j.plaphy.2016.06.002

Cited by 61 publications

(41 citation statements)

References 61 publications

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“…Barley seeds were germinated in the dark on a filter paper moistened with 0.5 mM CaSO 4 . After 4 days, homogeneous seedlings were transferred to a complete nutrient solution (Ca (NO 3 ) x 4H 2 O 0.01μM; Fe-EDTA 100μM) and grown hydroponically under continuous aeration for other 4 days under controlled conditions in a climate chamber with a 14/10 h day/night regime, 24˚C/19˚C, 70% relative humidity and 250 μmol m -2 s -1 light intensity as described by [45]. The first leaf and whole root system roots were sampled at 2 and 4 days separately and extracted in 1 mL of pure methanol for 24 hours under continuous shaking as previously described by [25].…”

Section: Growth Conditions and Samplingmentioning

confidence: 99%

New insights in the allelopathic traits of different barley genotypes: Middle Eastern and Tibetan wild-relative accessions vs. cultivated modern barley

et al. 2020

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The two alkaloids gramine and hordenine have been known for playing a role in the allelopathic ability in barley (Hordeum vulgare L.). These allelochemicals can be both found in leaves and roots in some barley cultivars whereas in others one seems to exclude the other. In this study eighteen accessions of barley from the Middle-East area, one accession from Tibet and the modern spring cultivar Barke, already used as parental donor in a nested associated mapping (NAM) population, were screened for their gramine, hordenine and Nmethyltyramine (the direct precursor of hordenine) content in leaves, roots and exudates. Moreover, the toxicity of the three allelochemicals on root growth inhibition on lettuce (Lactuca sativa L.) was evaluated. Results of this study showed the preferential production of gramine and hordenine in leaves and roots, respectively, in the nineteen barley accessions. On the other hand, in the modern barley cultivar Barke, the highest content of hordenine in roots and the general lack of gramine suggests a favored biosynthesis of the former. Gramine was not detected in the root exudates. In additions, different metabolomic profiles were observed in wild relatives compared to modern barley genotypes. The results also showed the phytotoxic effects of the three compounds on root growth of lettuce seedlings, with a reduction in root length and an increase of root surface area and diameter. In conclusion, this study highlighted the impact of the domestication effects on the production and distribution of the two allelopathic alkaloids gramine and hordenine in barley.

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Section: Growth Conditions and Samplingmentioning

confidence: 99%

New insights in the allelopathic traits of different barley genotypes: Middle Eastern and Tibetan wild-relative accessions vs. cultivated modern barley

et al. 2020

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“…2015; Orhan, 2016; Li and Jiang, 2017), which precludes the discrimination of the individual contribution of each of these traits. An increase in root Fe chelate reductase activity was observed in barley and tomato plants exposed to Fe deficiency conditions, after inoculation with bacterial strains capable of producing high levels of siderophores, but expressing also IAA and phosphate solubilization activity (Scagliola et al, 2016). Therefore, the evidence that bacterial siderophores actually contribute to relief Fe limitation in saline soils is still indirect.…”

Section: Chryseobacterium Balustinum Rhizobium Tropicimentioning

confidence: 99%

Siderophore-Producing Rhizobacteria as a Promising Tool for Empowering Plants to Cope with Iron Limitation in Saline Soils: A Review

2019

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In addition to draught, plants growing in arid soils face two major challenges: high salinity and iron (Fe) deficiency. Salinity attenuates growth, affects plant physiology and causes nutrient imbalance which is, in fact, one of the major consequences of saline stress. Fe is a micro-nutrient essential for plant development. It is required for several metalloenzymes involved in photosynthesis and respiration and Fe-deficiency is associated to chlorosis and low crop productivity. The role of microbial siderophores in Fe supply to plants is well documented as well as the effect of plant growth promoting rhizobacteria (PGPR) on the Page 1 of 41 http://pedosphere.issas.ac.cn Pedosphere mitigation of saline stress in crop cultures. However, the dual effect of siderophore-producing PGPR both on salt-stress and on Fe limitation is still poorly explored. This review provides a critical perspective on the combined effect of Fe limitation and soil salinization as challenges to modern agriculture and intends to summarize some indirect evidence that argue in favour of siderophore-producing PGPR as bio-fertilization agents in salinized soils. Recent developments as well as future perspectives on the use of PGPR are discussed as clues to sustainable agriculture practices, in the context of present and future climate change scenarios.

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“…The majority of credible group of PGPR belongs to genera Acinetobacter, Azadirachta, Azotobacter, Azospirillium, Bacillus, Burkholderia, Pantoea, Pseudomonas, Rahnella, Rhizobium, Serratia, and Streptomyces sp. (Bakhshandeh et al 2014, Scagliola et al 2016, Yaghoubi Khanghahi et al 2018c.…”

Section: Introductionmentioning

confidence: 99%

Leaf photosynthetic characteristics and photosystem II photochemistry of rice (Oryza sativa L.) under potassium-solubilizing bacteria inoculation

Khanghahi¹,

Pirdashti²,

Rahimian³

et al. 2019

Photosynt.

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The current research was performed to investigate the effects of three potassium-solubilizing bacteria (KSB) strains (Pantoea agglomerans, Rahnella aquatilis, and Pseudomonas orientalis) on leaf photosynthetic characteristics in rice (Oryza sativa L. cv. Pajohesh). A pot and a field experiment were conducted in a paddy field. The results indicated that the KSB inoculums significantly enhanced chlorophyll (Chl) a, Chl a+b, SPAD value, and stomatal conductance as compared to the control in both experiments, especially when applied along with half the recommended dose of the potassium chemical fertilizer. KSB inoculations, alone or combined with K fertilizer, significantly increased the value of photochemical quenching, photosynthetic electron transport rate, and the effective quantum efficiency as compared to the control. In conclusion, these native KSB strains could be used as inoculants to reduce consumption of K chemical fertilizer and improve the efficiency of photosynthesis for rice production under the flooding irrigation conditions.

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Characterization of plant growth promoting traits of bacterial isolates from the rhizosphere of barley ( Hordeum vulgare L.) and tomato ( Solanum lycopersicon L.) grown under Fe sufficiency and deficiency

Cited by 61 publications

References 61 publications

New insights in the allelopathic traits of different barley genotypes: Middle Eastern and Tibetan wild-relative accessions vs. cultivated modern barley

New insights in the allelopathic traits of different barley genotypes: Middle Eastern and Tibetan wild-relative accessions vs. cultivated modern barley

Siderophore-Producing Rhizobacteria as a Promising Tool for Empowering Plants to Cope with Iron Limitation in Saline Soils: A Review

Leaf photosynthetic characteristics and photosystem II photochemistry of rice (Oryza sativa L.) under potassium-solubilizing bacteria inoculation

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