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231223s2008 xx |||||o 00| ||eng c |
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|a 10.1016/j.plaphy.2008.05.006
|2 doi
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|a pubmed24n0602.xml
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|a (DE-627)NLM180521624
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|a (NLM)18586508
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Llamas, Andreu
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Ni2+ toxicity in rice
|b effect on membrane functionality and plant water content
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|c 2008
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 24.11.2008
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a CommentIn: Plant Signal Behav. 2009 Oct;4(10):980-2. - PMID 19826229
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|a Citation Status MEDLINE
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|a The heavy metal nickel is an essential mineral trace nutrient found at low concentrations in most natural soils. However, it may reach toxic levels in certain areas and affect a number of biochemical and physiological processes in plants. Wilting and leaf necrosis have been described as typical visible symptoms of Ni(2+) toxicity. The plasma membrane (PM) of root cells constitutes the first barrier for the entry of heavy metals but also a target of their toxic action. This work studies the relationship between disturbances of membrane functionality and the development of the typical symptoms of Ni(2+) toxicity. Rice plants (Oryza sativa L. cv. Bahia) grown in nutrient medium containing 0.5mM Ni(2+) showed a significant decrease in water content as a consequence of the stress. Addition of Ni(2+) to the solution bathing the roots induced a concentration-dependent PM depolarization but the activity of the PM-H(+)-ATPase was not inhibited by the presence of Ni(2+) and the initial resting potential recovered in less than 1h. In the short term (hours), membrane permeability of root cells was not significantly affected by Ni(2+) treatments. However, in the long term (days) a drastic loss of K(+) was measured in roots and shoots, which should be responsible for the changes in the water content measured, since stomatal conductance and the transpiration rate remained unaffected by Ni(2+) treatment. The effects induced by Ni(2+) were not permanent and could be reverted, at least in part, by transferring the plants to a medium without Ni(2+)
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|a Journal Article
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|a Water
|2 NLM
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| 650 |
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|a 059QF0KO0R
|2 NLM
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|a Nickel
|2 NLM
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| 650 |
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|a 7OV03QG267
|2 NLM
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| 700 |
1 |
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|a Ullrich, Cornelia I
|e verfasserin
|4 aut
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| 700 |
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|a Sanz, Amparo
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Plant physiology and biochemistry : PPB
|d 1991
|g 46(2008), 10 vom: 15. Okt., Seite 905-10
|w (DE-627)NLM098178261
|x 1873-2690
|7 nnns
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| 773 |
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|g volume:46
|g year:2008
|g number:10
|g day:15
|g month:10
|g pages:905-10
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|u http://dx.doi.org/10.1016/j.plaphy.2008.05.006
|3 Volltext
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