Characterization of bacterial communities associated with <i>Brassica napus</i> L. growing on a Zn-contaminated soil and their effects on root growth

Montalbán, Blanca; Croes, Sarah; Weyens, Nele; Lobo, M. C.; Pérez‐Sanz, Araceli; Vangronsveld, Jaco

doi:10.1080/15226514.2016.1183566

Cited by 20 publications

(12 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other PGPB, such as the Gram‐negative Pedobacter , is also capable of colonizing roots of many crop plants, e.g. potato and oilseed rape, and could be used as a biofertilizer. However, its effects on photosynthetic mechanisms, yield and growth of plants are poorly documented.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of plant growth‐promoting bacteria on the physiology, growth and fruit quality of strawberry

et al. 2019

View full text Add to dashboard Cite

BACKGROUND: The strawberry (Fragaria × ananassa Duch.) is, among small fruits, the most cultivated and commercialized in Portugal. Recent studies have evidenced the positive effect of plant growth-promoting bacteria (PGPB) inoculation on strawberry production and, at the same time, provided an alternative strategy to reduce the use of fertilizers. In this study the effects of root inoculation with three PGPB strains (Pedobacter sp. CC1, Bacillus safensis B106 and Bacillus subtilis B167A) on the physiology, growth, fruit production and quality of strawberry cv. Camarosa are presented. RESULTS: PGPB inoculation significantly accelerated crop maturation, with inoculated plants fruiting about 2 weeks earlier than non-inoculated plants. Inoculated plants withPedobacter sp. CC1 and Bacillus safensis B106 influenced the gas exchange parameters of strawberry plants. The contents of total phenolics and flavonoids in strawberry leaves were found to be greater with Pedobacter sp. CC1, when compared with non-inoculated plants. Furthermore, plants inoculated with the same bacterial strain showed enhancement in the dimensions of fruits, especially fruit length, and shape as well as in the total soluble solids content ( ∘ Brix). CONCLUSIONS:The results showed that the PGPB Pedobacter sp. CC1 improved performance of strawberry plants, suggesting that it could be a potential biofertilizer for strawberry plant nutrition. RESULTS Plant growthIn this experiment, strawberry plants started flowering about 1 month after planting (15 April), and the first fruits appeared at the end of April, about 2 weeks earlier than non-inoculated plants (Fig. 1). First harvest date was also advanced by 2 weeks in all inoculated plants, when compared with the same occurrence in non-inoculated plants. Compared with non-inoculated plants, those inoculated with PGPB strains showed prolonged fruiting season (Fig. 1). This fact was more evident in plants inoculated with Pedobacter sp. CC1 and Bacillus subtilis B167A strains.Regarding the studied growth parameters (number of leaves and plant height), the results showed that neither was significantly affected (P > 0.05) by bacterial inoculation (Table 1). However, there was a tendency for an increase in plant height with inoculation treatments. Inoculation with Pedobacter sp. CC1, Bacillus safensis B106 and Bacillus subtilis B167A strains increased plant J Sci Food Agric 2019; 99: 5341-5349

show abstract

Section: Introductionmentioning

confidence: 99%

Comparative study of plant growth‐promoting bacteria on the physiology, growth and fruit quality of strawberry

et al. 2019

View full text Add to dashboard Cite

show abstract

“…ACC deaminase activity can reduce the ethylene levels generated due to stress, improving the growth of plants in presence of toxic concentrations of metals [ 16 ]. It is important to mention that the endophytic bacterial strains that increased the growth of H. tuberosus also increased the length of the roots of Brassica napus seedlings in vertical agar plates containing toxic concentrations of Cd and Zn [ 24 ]. This suggests that these endophytes are beneficial for plants from different families.…”

Section: Resultsmentioning

confidence: 99%

“…This leads to a reduced metal uptake and translocation inside the plant, improving its growth through decreasing phytotoxicity [ 8 , 23 ]. In a previous study, we showed that bacterial strains isolated from a Zn contaminated soil increased root length of Brassica napus seedlings in the presence of Cd and Zn under in vitro conditions [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Cultivar and Metal-Specific Effects of Endophytic Bacteria in Helianthus tuberosus Exposed to Cd and Zn

Montalbán

Thijs

Lobo³

et al. 2017

IJMS

Self Cite

View full text Add to dashboard Cite

Plant growth promoting endophytic bacteria (PGPB) isolated from Brassica napus were inoculated in two cultivars of Helianthus tuberosus (VR and D19) growing on sand supplemented with 0.1 mM Cd or 1 mM Zn. Plant growth, concentrations of metals and thiobarbituric acid (TBA) reactive compounds were determined. Colonization of roots of H. tuberosus D19 by Pseudomonas sp. 262 was evaluated using confocal laser scanning microscopy. Pseudomonas sp. 228, Serratia sp. 246 and Pseudomonas sp. 262 significantly enhanced growth of H. tuberosus D19 exposed to Cd or Zn. Pseudomonas sp. 228 significantly increased Cd concentrations in roots. Serratia sp. 246, and Pseudomonas sp. 256 and 228 resulted in significantly decreased contents of TBA reactive compounds in roots of Zn exposed D19 plants. Growth improvement and decrease of metal-induced stress were more pronounced in D19 than in VR. Pseudomonas sp. 262-green fluorescent protein (GFP) colonized the root epidermis/exodermis and also inside root hairs, indicating that an endophytic interaction was established. H. tuberosus D19 inoculated with Pseudomonas sp. 228, Serratia sp. 246 and Pseudomonas sp. 262 holds promise for sustainable biomass production in combination with phytoremediation on Cd and Zn contaminated soils.

show abstract

“…To the best of our knowledge, there are no earlier reports about the isolation of endophytic and rhizospheric bacteria from this plant species. Though, there exist many studies reporting the isolation of trace element tolerant bacteria from other species such as Arabidopsis [31], Brassica napus [32,33], Thlaspi (syn. Noccaea) caerulescens [34], Nicotiana tabacum [35].…”

Section: Discussionmentioning

confidence: 99%

Phytostabilization of Polluted Military Soil Supported by Bioaugmentation with PGP-Trace Element Tolerant Bacteria Isolated from Helianthus petiolaris

et al. 2020

Self Cite

View full text Add to dashboard Cite

Lead (Pb) and cadmium (Cd) are major environmental pollutants, and the accumulation of these elements in soils and plants is of great concern in agricultural production due to their toxic effects on crop growth. Also, these elements can enter into the food chain and severely affect human and animal health. Bioaugmentation with plant growth-promoting bacteria (PGPB) can contribute to an environmentally friendly and effective remediation approach by improving plant survival and promoting element phytostabilization or extraction under such harsh conditions. We isolated and characterised Pb and Cd-tolerant root-associated bacteria from Helianthus petiolaris growing on a Pb/Cd polluted soil in order to compose inoculants that can promote plant growth and also ameliorate the phytostabilization or phytoextraction efficiency. One hundred and five trace element-tolerant rhizospheric and endophytic bacterial strains belonging to eight different genera were isolated from the aromatic plant species Helianthus petiolaris. Most of the strains showed multiple PGP-capabilities, ability to immobilise trace elements on their cell wall, and promotion of seed germination. Bacillus paramycoides ST9, Bacillus wiedmannii ST29, Bacillus proteolyticus ST89, Brevibacterium frigoritolerans ST30, Cellulosimicrobium cellulans ST54 and Methylobacterium sp. ST85 were selected to perform bioaugmentation assays in greenhouse microcosms. After 2 months, seedlings of sunflower (H. annuus) grown on polluted soil and inoculated with B. proteolyticus ST89 produced 40% more biomass compared to the non-inoculated control plants and accumulated 20 % less Pb and 40% less Cd in the aboveground plant parts. In contrast, B. paramycoides ST9 increased the bioaccumulation factor (BAF) of Pb three times and of Cd six times without inhibiting plant growth. Our results indicate that, depending on the strain, bioaugmentation with specific beneficial bacteria can improve plant growth and either reduce trace element mobility or enhance plant trace element uptake.

show abstract

Characterization of bacterial communities associated with Brassica napus L. growing on a Zn-contaminated soil and their effects on root growth

Cited by 20 publications

References 62 publications

Comparative study of plant growth‐promoting bacteria on the physiology, growth and fruit quality of strawberry

Comparative study of plant growth‐promoting bacteria on the physiology, growth and fruit quality of strawberry

Cultivar and Metal-Specific Effects of Endophytic Bacteria in Helianthus tuberosus Exposed to Cd and Zn

Phytostabilization of Polluted Military Soil Supported by Bioaugmentation with PGP-Trace Element Tolerant Bacteria Isolated from Helianthus petiolaris

Contact Info

Product

Resources

About