Phytoremediation of Zinc-Contaminated Soil and Zinc-Biofortification for Human Nutrition

Zhao, Li; Yuan, Linxi; Wang, Zhangmin; Lei, Tianyu; Yin, Xuebin

doi:10.1007/978-94-007-1439-7_3

Cited by 12 publications

(8 citation statements)

References 95 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are several reasons why these plants are of interest to researchers. First, they can be studied to understand the mechanisms used by plants to take up, store and tolerate metals, and thereby provide useful insight into potential strategies for biofortification of crops (Cakmak, ; White & Broadley, ; Zhao et al ., ). Secondly, they can have practical applications in both phytoremediation of metal‐polluted soils and phytoextraction of valuable metals from the environment (Chaney et al ., ; Zhao & McGrath, ; Terry & Bañuelos, ).…”

Section: Introductionmentioning

confidence: 97%

Trade‐offs between metal hyperaccumulation and induced disease resistance in metal hyperaccumulator plants

Fones

Preston

2013

Plant Pathology

View full text Add to dashboard Cite

Metal hyperaccumulation is an unusual trait involving the uptake and storage of high concentrations of metals in the aerial tissues of plants. A number of hypotheses have been proposed to explain the evolution of the metal hyperaccumulation trait, of which the hypothesis that accumulated metal provides a defence against herbivores or pathogens has received most attention and support. Metal hyperaccumulation requires a range of physiological adaptations that enable plants to take up, transport, sequester and tolerate high concentrations of metal. Such adaptations may confer a fitness cost, and it has been suggested that metal hyperaccumulator plants may compensate for this cost by reducing investment in other traits such as induced disease resistance. This is supported by recent work that shows that metal hyperaccumulators such as Noccaea spp. show reduced or altered production of key components of induced disease resistance. However, an alternative explanation exists, which is that the physiological adaptations involved in metal hyperaccumulation require alterations to, or compromise, functional aspects of plant defence mechanisms. Here, the evidence for trade-offs between metal hyperaccumulation and disease resistance mechanisms is reviewed, and the nature of the physiological adaptations involved in metal hyperaccumulation and their potential to impact other forms of plant defence is discussed. It is suggested that defensive trade-offs may have been key to the evolution of the metal hyperaccumulation trait, resulting in increased dependence upon the protection conferred by metals.

show abstract

Section: Introductionmentioning

confidence: 97%

Trade‐offs between metal hyperaccumulation and induced disease resistance in metal hyperaccumulator plants

Fones

Preston

2013

Plant Pathology

View full text Add to dashboard Cite

show abstract

“…AZ6 coated on urea may acidify the environment through producing organic acids and chelating Zn as previously reported by Hussain et al [ 25 , 26 ] and Mumtaz et al [ 29 ]. This treatment might also cause improvement in the uptake and translocation of Zn from the roots, shoots, and grains [ 54 ]. A similar increase in grain Zn contents was also reported to be caused by Bacillus and Pseudomonas strains [ 55 ].…”

Section: Discussionmentioning

confidence: 99%

Impact of Coating of Urea with Bacillus-Augmented Zinc Oxide on Wheat Grown under Salinity Stress

Ain

Naveed

Hussain

et al. 2020

Plants

View full text Add to dashboard Cite

Zinc (Zn) availability is limited in salt-affected soils due to high soil pH and calcium concentrations causing Zn fixation. The application of synthetic Zn fertilizer is usually discouraged due to the high cost and low Zn use efficiency. However, salt-tolerant Zn-solubilizing bacteria (ZSB) are capable of solubilizing fixed fractions of Zn and improving fertilizer use efficiency. In the current study, a product was formulated by coating urea with bioaugmented zinc oxide (ZnO) to improve wheat productivity under a saline environment. The promising ZSB strain Bacillus sp. AZ6 was used for bioaugmentation on ZnO powder and termed as Bacillus sp. AZ6-augmented ZnO (BAZ). The experiment was conducted in pots by applying urea granules after coating with BAZ, to evaluate its effects on wheat physiology, antioxidant activity, and productivity under saline (100 mM NaCl) and non-saline (0 mM NaCl) conditions. The results revealed that the application of BAZ-coated urea alleviated salt stress through improving the seed germination, plant height, root length, photosynthetic rate, transpiration rate, stomatal conductance, soil plant analysis development (SPAD) value, number of tillers and grains, spike length, spike weight, 1000-grain weight, antioxidant activity (APX, GPX, GST, GR, CAT, and SOD), and NPK contents in the straw and grains of the wheat plants. Moreover, it also enhanced the Zn contents in the shoots and grains of wheat by up to 29.1 and 16.5%, respectively, over absolute control, under saline conditions. The relationships and variation among all the studied morpho-physio and biochemical attributes of wheat were also studied by principal component (PC) and correlation analysis. Hence, the application of such potential products may enhance nutrient availability and Zn uptake in wheat under salt stress. Therefore, the current study suggests the application of BAZ-coated urea for enhancing wheat’s physiology, antioxidant system, nutrient efficiency, and productivity effectively and economically.

show abstract

“…These treatments might also improve the plant's ability to uptake higher Zn contents because of available Zn contents in the soil for longer periods. Moreover, efficient translocation to shoots and remobilization of Zn [38] might be the reasons for improved Zn loading in grains (biofortification). Previously, an increase in grains Zn contents was also reported when the crop was inoculated with ZSB genera of Pseudomonas and Bacillus [13,39,40].…”

Section: Discussionmentioning

confidence: 99%

Efficiency of Various Formulations of Urea Coated with Bioaugmented (<i>Bacillus</i> sp.) ZnO to Improve Growth, Yield and Zn Contents of Wheat Grains

Nazir¹,

Hussain²,

Mumtaz³

et al. 2020

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

Zinc (Zn) biofortification in staple cereal grains is a low-cost and viable option to overcome the Zn deficiency in humans beings in developing countries. Intensive cropping with no/low micronutrient fertilization has resulted in soil Zn deficiency around the globe. Moreover, the Zn use efficiency of soils is usually low owing to its fixation into unavailable forms. Hence, the present study was conducted to investigate the integrated effects of urea coated with bioaugmented Zn on wheat growth, yield, and Zn biofortification. The bioaugmented Zn was prepared by inoculating ZnO with Bacillus sp. AZ6. Three levels (0.5, 1.0, and 1.5%) of ZnO, bioaugmented Zn, and bioaugmented Zn+organic material were coated on urea fertilizer and applied to investigate the performance of the wheat crop. The applied treatments were compared with absolute control and sole application of ZnSO 4 , and Bacillus sp. AZ6. Results revealed that the application of urea coated with 1.5% bioaugmented Zn significantly increased wheat growth, yield, and Zn biofortification as compared to the sole ZnSO 4 , and Bacillus sp. AZ6 treatments. The application of urea coated with 1.5% bioaugmented Zn improved the accumulation of Zn in shoots and grains by 83.3% and 144.0%, respectively, compared to absolute control. The increase in grain Zn content was owing to the significant reduction in grain phytic acid (69.9%) and phytate:Zn molar ratios (87.6%) compared to absolute control. Therefore, it was concluded that the application of urea coated with bioactivated ZnO can improve Zn biofortification in wheat grain by reducing phytic acid concentrations, consequently fulfilling human Zn needs through the consumption of such Zn enrich wheat grains.

show abstract

Phytoremediation of Zinc-Contaminated Soil and Zinc-Biofortification for Human Nutrition

Cited by 12 publications

References 95 publications

Trade‐offs between metal hyperaccumulation and induced disease resistance in metal hyperaccumulator plants

Trade‐offs between metal hyperaccumulation and induced disease resistance in metal hyperaccumulator plants

Impact of Coating of Urea with Bacillus-Augmented Zinc Oxide on Wheat Grown under Salinity Stress

Efficiency of Various Formulations of Urea Coated with Bioaugmented (<i>Bacillus</i> sp.) ZnO to Improve Growth, Yield and Zn Contents of Wheat Grains

Contact Info

Product

Resources

About