Effect of cadmium and nickel on ethylene biosynthesis in soybean

Pennazio, S.; Roggero, P.

doi:10.1007/bf02925896

Cited by 29 publications

(12 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, the presence of ACCD may obscure siderophore‐related effects. Based on the observation that S. tendae F4 does not show ACCD activity, we speculate that the bacterium, though a siderophore and an auxin producer, could not clearly enhance plant growth, probably, because of the occurrence of high levels of stress ethylene induced by Cd (Pennasio and Roggero 1992), which, in this case, might not have been neutralized owing to the absence of a bacterial ACCD. Possibly, the amount of siderophores produced in soil might have been insufficient to counter the inhibitory effect of Cd on auxins, which seemed apparent from the fact that most of the siderophores were involved in plant Fe uptake – hence higher Fe content in these plants – rather than in interacting with Cd.…”

Section: Discussionmentioning

confidence: 92%

Siderophores mediate reduced and increased uptake of cadmium byStreptomyces tendaeF4 and sunflower (Helianthus annuus), respectively

Dimkpa

Merten

Svatoš

et al. 2009

Journal of Applied Microbiology

324

118

View full text Add to dashboard Cite

Aims: As a toxic metal, cadmium (Cd) affects microbial and plant metabolic processes, thereby potentially reducing the efficiency of microbe or plant‐mediated remediation of Cd‐polluted soil. The role of siderophores produced by Streptomyces tendae F4 in the uptake of Cd by bacteria and plant was investigated to gain insight into the influence of siderophores on Cd availability to micro‐organisms and plants. Methods and Results: The bacterium was cultured under siderophore‐inducing conditions in the presence of Cd. The kinetics of siderophore production and identification of the siderophores and their metal‐bound forms were performed using electrospray ionization mass spectrometry. Inductively coupled plasma spectroscopy was used to measure iron (Fe) and Cd contents in the bacterium and in sunflower plant grown in Cd‐amended soil. Siderophores significantly reduced the Cd uptake by the bacterium, while supplying it with iron. Bacterial culture filtrates containing three hydroxamate siderophores secreted by S. tendae F4 significantly promoted plant growth and enhanced uptake of Cd and Fe by the plant, relative to the control. Furthermore, application of siderophores caused slightly more Cd, but similar Fe uptake, compared with EDTA. Bioinoculation with Streptomyces caused a dramatic increase in plant Fe content, but resulted only in slight increase in plant Cd content. Conclusion: It is concluded that siderophores can help reduce toxic metal uptake in bacteria, while simultaneously facilitating the uptake of such metals by plants. Also, EDTA is not superior to hydroxamate siderophores in terms of metal solubilization for plant uptake. Significance and Impact of the Study: The study showed that microbial processes could indirectly influence the availability and amount of toxic metals taken up from the rhizosphere of plants. Furthermore, although EDTA is used for chelator‐enhanced phytoremediation, microbial siderophores would be ideal for this purpose.

show abstract

Section: Discussionmentioning

confidence: 92%

Siderophores mediate reduced and increased uptake of cadmium byStreptomyces tendaeF4 and sunflower (Helianthus annuus), respectively

Dimkpa

Merten

Svatoš

et al. 2009

Journal of Applied Microbiology

324

118

View full text Add to dashboard Cite

show abstract

“…Soil contaminated by heavy metals is absorbed by the roots of the plant and diffused to the different parts of plants, which consequently disturbs the plant's metabolic activity as well as deteriorate the plant development [269,270]. When plants are exposed to heavy metal stress or other abiotic stresses the endogenous ethylene level increases [259,[271][272][273]. Pseudomonas koreensis AGB-1 isolated from Miscanthus sinensis is effective against metal toxicity and contains heavy metal marker genes in their genome [274].…”

Section: Heavy Metal Stressmentioning

confidence: 99%

PGPR‐mediated induction of systemic resistance and physiochemical alterations in plants against the pathogens: Current perspectives

et al. 2020

View full text Add to dashboard Cite

Plant growth‐promoting rhizobacteria (PGPR) are diverse groups of plant‐associated microorganisms, which can reduce the severity or incidence of disease during antagonism among bacteria and soil‐borne pathogens, as well as by influencing a systemic resistance to elicit defense response in host plants. An amalgamation of various strains of PGPR has improved the efficacy by enhancing the systemic resistance opposed to various pathogens affecting the crop. Many PGPR used with seed treatment causes structural improvement of the cell wall and physiological/biochemical changes leading to the synthesis of proteins, peptides, and chemicals occupied in plant defense mechanisms. The major determinants of PGPR‐mediated induced systemic resistance (ISR) are lipopolysaccharides, lipopeptides, siderophores, pyocyanin, antibiotics 2,4‐diacetylphoroglucinol, the volatile 2,3‐butanediol, N‐alkylated benzylamine, and iron‐regulated compounds. Many PGPR inoculants have been commercialized and these inoculants consequently aid in the improvement of crop growth yield and provide effective reinforcement to the crop from disease, whereas other inoculants are used as biofertilizers for native as well as crops growing at diverse extreme habitat and exhibit multifunctional plant growth‐promoting attributes. A number of applications of PGPR formulation are needed to maintain the resistance levels in crop plants. Several microarray‐based studies have been done to identify the genes, which are associated with PGPR‐induced systemic resistance. Identification of these genes associated with ISR‐mediating disease suppression and biochemical changes in the crop plant is one of the essential steps in understanding the disease resistance mechanisms in crops. Therefore, in this review, we discuss the PGPR‐mediated innovative methods, focusing on the mode of action of compounds authorized that may be significant in the development contributing to enhance plant growth, disease resistance, and serve as an efficient bioinoculants for sustainable agriculture. The review also highlights current research progress in this field with a special emphasis on challenges, limitations, and their environmental and economic advantages.

show abstract

“…Doelman (1985) has reported that the efficiency of revegetation and phytoremediation of heavy metal-contaminated sites is closely related to the presence of higher proportions of metal resistant microbial populations in the soil, which likely conferred a better nutritional assimilation and protection effect on plants. It is known that contamination of soil with heavy metals increases the accumulation of ACC and ethylene in plant roots (Pennasio and Roggero, 1992). It may be speculated that increased accumulation of ACC in roots, caused by stressful growth conditions, can facilitate colonization of the rhizoplane with some metal-resistant forms of ACC-utilizing bacteria to some extent by providing the bacteria with additional sources of nitrogen, such as ACC.…”

Section: Plant Growth Promoting Potential Of a Xylosoxidans Ax10mentioning

confidence: 99%

Inoculation of plant growth promoting bacterium Achromobacter xylosoxidans strain Ax10 for the improvement of copper phytoextraction by Brassica juncea

Rajkumar

Freitas

2009

Journal of Environmental Management

248

View full text Add to dashboard Cite

In this study, a copper-resistant plant growth promoting bacterial (PGPB) strain Ax10 was isolated from a Cu mine soil to assess its plant growth promotion and copper uptake in Brassica juncea. The strain Ax10 tolerated concentrations up to 600 mg CuL(-1) on a Luria-Bertani (LB) agar medium and utilized 1-aminocyclopropane-1-carboxylic acid (ACC) as a sole N source in DF salts minimal medium. The strain Ax10 was characterized as Achromobacter xylosoxidans based on its 16S rDNA sequence homology (99%). The bacterium A. xylosoxidans Ax10 has also exhibited the capability of producing indole acetic acid (IAA) (6.4 microg mL(-1)), and solubilizing inorganic phosphate (89.6 microg mL(-1)) in specific culture media. In pot experiments, inoculation of A. xylosoxidans Ax10 significantly increased the root length, shoot length, fresh weight and dry weight of B. juncea plants compared to the control. This effect can be attributed to the utilization of ACC, production of IAA and solubilization of phosphate. Furthermore, A. xylosoxidans Ax10 inoculation significantly improved Cu uptake by B. juncea. Owing to its wide action spectrum, the Cu-resistant A. xylosoxidans Ax10 could serve as an effective metal sequestering and growth promoting bioinoculant for plants in Cu-stressed soil. The present study has provided a new insight into the phytoremediation of Cu-contaminated soil.

show abstract

Effect of cadmium and nickel on ethylene biosynthesis in soybean

Cited by 29 publications

References 8 publications

Siderophores mediate reduced and increased uptake of cadmium byStreptomyces tendaeF4 and sunflower (Helianthus annuus), respectively

Siderophores mediate reduced and increased uptake of cadmium byStreptomyces tendaeF4 and sunflower (Helianthus annuus), respectively

PGPR‐mediated induction of systemic resistance and physiochemical alterations in plants against the pathogens: Current perspectives

Inoculation of plant growth promoting bacterium Achromobacter xylosoxidans strain Ax10 for the improvement of copper phytoextraction by Brassica juncea

Contact Info

Product

Resources

About