Subcellular distribution and chemical forms of cadmium in Impatiens walleriana in relation to its phytoextraction potential

Lai, Hung-Yu

doi:10.1016/j.chemosphere.2015.06.047

Cited by 119 publications

(43 citation statements)

References 32 publications

(55 reference statements)

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“…Relative to D25 plants, the Cd accumulation in the roots and shoots of D50 plants also increased or significantly (p < 0.05) increased (Table 1) which was possibly resulted from the development of detoxification mechanism. Besides and in accordance with previous studies (Salt et al 1995;Liu et al 2010;Lai 2015a;Lai 2015b), higher LA is beneficial for the upward translocation of Cd from root to shoot. Relative to D25 plants, the D50 plants had higher LA (data not shown) and thus also had higher TF (Table 1).…”

Section: Discussionsupporting

confidence: 90%

“…Liu et al (2010) also reported a positive relationship between the shoots' Cd concentration and transpiration in Phytolacca americana. As already indicated, the root Cd in the F s has a high migration capacity compared with the other two fractions, so it will translocate to aerial parts by transpiration (Lai 2015a;Lai 2015b). The chemical forms of Cd in the F E and F W also have higher migration abilities, compared with the other fractions (Wang et al 2008).…”

Section: Discussionmentioning

confidence: 87%

“…Impatiens, a common garden flower in Taiwan, can be propagated from cuttings. Our previous study showed that rooted cuttings accumulated high concentrations of Cd and its BCF was greater than unity (Lai 2015a;Lai 2015b). However, the TF of plants was less than 0.2, which possibly reflected the incomplete leaf area development compared with marketable seedlings.…”

Section: Introductionmentioning

confidence: 80%

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Effects of extended growth periods on subcellular distribution, chemical forms, and the translocation of cadmium inImpatiens walleriana

Lai

Cai

2015

International Journal of Phytoremediation

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Impatiens walleriana plants accumulate sufficiently high concentrations of cadmium (Cd) for this species to be considered a potential Cd hyperaccumulator. Rooted cuttings were grown hydroponically for 25 and 50 days in solutions spiked with various Cd concentrations. The subcellular distribution and chemical forms of Cd in different organs were analyzed, and its upward translocation was also assessed. The plants accumulated large amounts of Cd; the Cd concentration in the roots and shoots reached 120-1900 and 60-1600 mg/kg, respectively. Regardless of the growth period, the Cd accumulated in the roots was primarily compartmentalized in the soluble fraction or ethanol and deionized water extractable chemical forms with high migration abilities. Translocation to the shoots was followed by an association of Cd mainly in the cell wall or with pectate and protein. The roots' Cd showed a high migration capacity for predicting the shoots' Cd concentrations. Different exposure periods significantly affected the subcellular distribution of Cd in the stems, and thus the upward translocation.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 80%

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Effects of extended growth periods on subcellular distribution, chemical forms, and the translocation of cadmium inImpatiens walleriana

Lai

Cai

2015

International Journal of Phytoremediation

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“…Compared to Cd-sensitive barley genotypes, Cd-resistant genotypes accumulated more Cd in cell wall and soluble containing fractions, and less Cd in organelle containing fractions (Wu et al, 2005). Once absorbed by plants, Cd will distribute in different chemical forms, including inorganic, water soluble Cd-organic acid, pectate- and protein-integrated, insoluble phosphate, and oxalate forms (Lai, 2015). To reduce Cd mobility and toxicity in plants, Cd can be converted into undissolved phosphate or pectate- and protein-bound forms (Wu et al, 2005; Wang et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Integration of Cadmium Accumulation, Subcellular Distribution, and Physiological Responses to Understand Cadmium Tolerance in Apple Rootstocks

Zhou

Wan

et al. 2017

Front. Plant Sci.

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Cadmium (Cd) is a nonessential and highly toxic element causing agricultural problems. However, little information is available about the variation in Cd tolerance among apple rootstocks and its underlying physiological regulation mechanisms. This study investigated Cd accumulation, subcellular distribution, and chemical forms as well as physiological changes among four apple rootstocks exposed to either 0 or 300 μM CdCl2. The results showed that variations in Cd tolerance existed among these rootstocks. Cd exposure caused decline in photosynthesis, chlorophyll and biomass in four apple rootstocks, which was less pronounced in M. baccata, indicating its higher Cd tolerance. This finding was corroborated with higher Cd tolerance indexes (TIs) of the whole plant in M. baccata than those in the other three apple rootstocks. Among the four apple rootstocks, M. baccata displayed the lowest Cd concentrations in roots, wood, and leaves, the smallest total Cd amounts as well as the lowest BCF. In apple rootstocks, it was found that to immobilize Cd in cell wall and soluble fraction (most likely in vacuole) and to convert it into pectate- or protein- integrated forms and undissolved Cd phosphate forms may be the primary strategies to reduce Cd mobility and toxicity. The physiological changes including ROS, carbohydrates and antioxidants were in line with the variations of Cd tolerance among four apple rootstocks. In comparison with the other three apple rootstocks, M. baccata had lower concentrations of ROS in roots and bark, H2O2 in roots and leaves and MDA in roots, wood and bark, but higher concentrations of soluble sugars in bark and starch in roots and leaves, and enhanced antioxidants. These results indicate that M. baccata are more tolerant to Cd stress than the other three apple rootstocks under the current experiment conditions, which is probably related to Cd accumulation, subcellular partitioning and chemical forms of Cd and well-coordinated antioxidant defense mechanisms.

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“…The chemical form of Cd determines the characteristics of Cd migration, potential phytotoxicity, and accumulation in plants and then influences the detoxification and tolerance to Cd of plants [10][11][12][13]. Yin et al [12] found that the different capacity to binding Cd different forms (such as F HCl -Cd and F r -Cd) played an important role in the genotype difference in Cd accumulation of spinach.…”

Section: Introductionmentioning

confidence: 99%

The Response of Duckweed (Lemna minor L.) Roots to Cd and Its Chemical Forms

Xue

Wang

Huang

et al. 2018

Journal of Chemistry

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The response of duckweed (Lemna minor L.) roots to Cd and its chemical forms was investigated. The relative root growth rate and concentrations of Cd and its different chemical forms in the root, that is, ethanol-extractable (F E -Cd), HCl-extractable (F HClCd), and residual fractions (F r -Cd), were quantified. Weibull model was used to unravel the regression between the relative root elongation (RRL) with chemical forms of Cd. Parameters assessed catalase (CAT), peroxidases (POD), and superoxide dismutase (SOD), as well as malondialdehyde (MDA) and total antioxidant capacity (A-TOC). Our results show that both the relative root growth rate and relative frond number were affected by Cd concentrations. The chemical forms of Cd were influenced by Cd content in the medium. Relative root elongation (RRL) showed a significant correlation with chemical forms of Cd. Additionally, POD and SOD increased at lower Cd concentrations followed by a decrease at higher Cd concentrations (at more than 5 M Cd). Moreover, MDA and A-TOC increased and CAT decreased with increasing Cd exposure. Furthermore, CAT showed a significant correlation with F HCl -Cd. Taken together, it can be concluded that the chemical forms of Cd are statistically significant predictors of Cd toxicity to duckweed and to the other similar aquatic plants.

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Subcellular distribution and chemical forms of cadmium in Impatiens walleriana in relation to its phytoextraction potential

Cited by 119 publications

References 32 publications

Effects of extended growth periods on subcellular distribution, chemical forms, and the translocation of cadmium inImpatiens walleriana

Effects of extended growth periods on subcellular distribution, chemical forms, and the translocation of cadmium inImpatiens walleriana

Integration of Cadmium Accumulation, Subcellular Distribution, and Physiological Responses to Understand Cadmium Tolerance in Apple Rootstocks

The Response of Duckweed (Lemna minor L.) Roots to Cd and Its Chemical Forms

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