Inhibition of zeaxanthin epoxidase activity by cadmium ions in higher plants

Latowski, Dariusz; Kruk, Jerzy; Strzałka, Kazimierz

doi:10.1016/j.jinorgbio.2005.07.012

Cited by 23 publications

(12 citation statements)

References 49 publications

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“…On the other hand, no changes in the amount of pigments have been observed in Cd-treated apricot leaves [23]. In leaves of Cd-treated tomato, no changes were observed after high light illumination while significant decrease of violaxanthin and significant increase of both antheraxanthin and zeaxanthin occurred after the following 24 h of darkness [23]. Zn induced a large increase of all xanthophyll cycle pigments in duckweed plants [22] and increased de-epoxidation of violaxanthin cycle pigments in sugar beet plants [7].…”

Section: Introductionmentioning

confidence: 87%

“…For example, a significant increase in the amount of the pigments was observed in Cd-treated duckweed plants [22]. On the other hand, no changes in the amount of pigments have been observed in Cd-treated apricot leaves [23]. In leaves of Cd-treated tomato, no changes were observed after high light illumination while significant decrease of violaxanthin and significant increase of both antheraxanthin and zeaxanthin occurred after the following 24 h of darkness [23].…”

Section: Introductionmentioning

confidence: 95%

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The impact of increased soil risk elements on carotenoid contents

et al. 2014

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A pot experiment was conducted to compare the responses of a non-transgenic tobacco plant (WT) and plants with genetically prolonged life-span (SAG) to risk elements of As, Cd and Zn. Plants were grown in control soil and in soil with higher levels of risk elements. The pigment contents were established by HPLC and chlorophyll fluorescence parameters were measured from slow kinetics after a 15 min dark period with the PAM fluorometer. Top (i.e. young) leaves of both WT and SAG plants were more sensitive to photoinhibition caused by these risk elements but plants showed acclimation to such elements in the bottom leaves. Plants differed in the participation of individual pigments of xanthophyll cycle: increased levels of risk elements seem to stimulate especially first (violaxanthin to antheraxanthin) and second (anhtheraxanthin to zeaxanthin) steps of the cycle in WT plants. In SAG plants, toxic elements caused an increase in the content, particularly of the initial compound of the cycle — violaxanthin.

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Section: Introductionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 95%

The impact of increased soil risk elements on carotenoid contents

et al. 2014

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“…Heavy metals, including cadmium, can bind to the functional groups of biological molecules, leading to changes in their structure and activity (Latowski et al, 2005; Sharma et al, 2008). Cadmium might also affect protein functions by replacing other divalent ions, such as Ca 2+ or Zn 2+ (Chmielowska-Bąak et al, 2013a).…”

Section: Post-transcriptional Modification Of Proteinsmentioning

confidence: 99%

The new insights into cadmium sensing

et al. 2014

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Cadmium (Cd) is non-essential heavy metal, which in excess, exhibits deleterious effects to the most of the organisms. Mobilization of defense mechanisms against this toxic agent requires rapid activation of signaling pathways. The article presents recent advances in the research concerning cadmium signal transduction in plants. New insights into the involvement of reactive oxygen species (ROS), nitric oxide (NO), plant growth regulators, and Cd-induced protein modifications are reviewed. Moreover, the role of recently recognized Cd-associated signal elements, including micro RNAs and several cis- and trans-acting elements is discussed.

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“…Molecular oxygen, FAD, NADPH or reduced ferredoxin are known cosubstrates for the epoxidation reaction. Inhibition of ZE activity by cadmium, which is reversed by zinc, implies an important role for cysteine residue, which is located in one of the most conservative ZE domains, in the molecular mechanism of enzyme inhibition (Latowski et al, 2005). A mechanism for the reaction carried out by ZE has been postulated on the basis of the inhibition of epoxidation by amino derivatives such as 2-(4-chlorophenylthio)triethylamine (CPTA) or 2-(4-methylphenoxy)-triethylamine (MPTA) (Bouvier et al, 1996).…”

Section: Introductionmentioning

confidence: 99%