Untitled

Fang, Wei-Ching; Wang, Jen-Wu; Lin, Chuan Chi; Kao, Ching Huei

doi:10.1023/a:1013879019368

Cited by 82 publications

(23 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This cell damage, however, did not reflect an increase in membrane lipid peroxidation (Table 2). Nevertheless, lipid peroxidation has been reported for several plant species exposed to iron in excess (Fang et al 2001;Souza-Santos et al 2001). In spite of Table 2 Catalase (CAT), peroxidase (POX), ascorbate peroxidase (APX) and superoxide dismutase (SOD) activities, relative membrane permeability and malondialdehyde (MDA) concentration in Clusia hilariana after application of different doses of SPM Fe onto the soil or leaf surface SPM Fe (mg cm -2 day -1 ) CAT (lmol min -1 g -1 FW) POX (lmol min -1 g -1 FW) APX (lmol min -1 g -1 FW) SOD (lmol min -1 g -1 FW) that, the changes in SOD and CAT activities observed here indicate the occurrence of oxidative stress, contributing to the photosynthetic impairment.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Photosynthetic changes and oxidative stress caused by iron ore dust deposition in the tropical CAM tree Clusia hilariana

Pereira

Oliva

Kuki

et al. 2008

Trees

View full text Add to dashboard Cite

The effect of iron solid particulate matter (SPM Fe ) deposited onto soil and leaves on photosynthesis and oxidative stress was evaluated in Clusia hilariana, a CAM tropical tree of high occurrence in Brazilian restingas. Significant increases in iron content were found in plants exposed to SPM Fe applied onto leaf and soil surfaces. However, only the application of SPM Fe on leaves of C. hilariana caused significant reductions in some evaluated characteristics such as photosynthetic rate, stomatal conductance, transpiration, organic acid accumulation, potential quantum yield of PSII, and changes in daily CAM photosynthesis pattern. Increase in relative membrane permeability and reduction in catalase and superoxide dismutase activities in the leaves of plants exposed to SPM Fe also were observed; however, lipid peroxidation did not change. These responses seem to be due to the combination of physical effects such as increase of leaf temperature, reduction in light absorption, obstruction of stomatal pores, and biochemical effects triggered by oxidative stress.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Chlorophyll a, b, and carotenoid determination followed the protocol established by Wellburn (1994), using dimethylsulphoxide (DMSO) as extractant. In these same leaves, titratable acidity was determined at the beginning and the end of the day (Eastmond and Ross 1997) and membrane permeability by electrolyte leakage (Tarhanen et al 1999).…”

Section: Methodsmentioning

confidence: 99%

Photosynthetic changes and oxidative stress caused by iron ore dust deposition in the tropical CAM tree Clusia hilariana

Pereira

Oliva

Kuki

et al. 2008

Trees

View full text Add to dashboard Cite

show abstract

“…in the rhizosphere to Fe 3? using oxygen transported in the aerenchyma of the roots (Doran et al 2006); exclusion by the root surface and retention within the root tissue (Sahrawat 2004); storage of excessive iron in the apoplasm and vacuole; adsorption of iron by ferritin in plastids (Briat 1996) and detoxication of the active oxygen species by enzymes like catalases, peroxydases and superoxyde dismutases (Becana et al 1998;Fang et al 2001;Becker and Asch 2005;Briat and Vert 2004).…”

Section: Introductionmentioning

confidence: 99%

QTL mapping for biomass and physiological parameters linked to resistance mechanisms to ferrous iron toxicity in rice

et al. 2009

View full text Add to dashboard Cite

Lowland rice is often subject to iron toxicity which may lead to yield reduction. In order to cope with this nutrient disorder, plants have developed resistance strategies. The aim of this research was to assess morphological and physiological parameters linked to iron toxicity resistance mechanisms and to identify quantitative trait loci (QTLs) involved in their genetic determinism. A segregating population consisting of 164 recombinant inbred lines (RILs) derived from a cross between Azucena and IR64 was tested twice in hydroponics at the vegetative stage at 0 and 250 mg Fe 2? l -1 . Morphological traits were measured on all 164 RILs. Physiological traits, which were too time-consuming to allow their measurement on all the population, were measured on the two parents and extreme individuals only, selected on the basis of their leaf bronzing index and shoot dry weight. A total of 24 putative QTLs was identified on chromosomes 1, 2, 3, 4, 7 and 11 for leaf bronzing index, shoot water content, shoot and root dry weight, relative variation of shoot and root dry weight, shoot iron concentration, stomatal resistance and chlorophyll content index. Several QTLs were detected in overlapping regions for different parameters. The pertinence of phenotyping extreme RILs only for a QTL analysis is discussed in this study. The QTL analysis allowed to better understand the physiological response of rice in the presence of an excess of ferrous iron, inclusive the relations existing between the stomata closure, the shoot water content reduction and the oxidative stress linked to these growth conditions.

show abstract

“…This iron accumulation causes serious damages to the plant, mainly because free iron catalyzes an oxidative stress through the formation of reactive oxygen species such as the extremely reactive OH . radical (Becana et al 1998;Fang et al 2001;Robello et al 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Some species may also tolerate elevated Fe concentrations in leaf tissue. They may detoxify reactive oxygen species by using antioxidant molecules like glutathione (GSH) or ascorbate (ASA) and through the activation of antioxidative enzymes including superoxide dismutase, catalase, enzymes of the ascorbate-glutathione cycle and non-specific peroxidases (Becana et al 1998;Fang et al 2001). Finally, plants can also accumulate iron in a non toxic form by disposing it in vacuoles and apoplast or by sequestering it in ferritin (Briat and Lobréaux 1997).…”

Section: Introductionmentioning

confidence: 99%

Abscisic acid and oxidative stress implications in overall ferritin synthesis by African rice (Oryza glaberrima Steud.) seedlings exposed to short term iron toxicity

2009

View full text Add to dashboard Cite

Iron toxicity occurs under flooded conditions such as those prevailing in lowland rice fields and is due to an excess of ferrous ions. Ferritin is a multimeric protein responsible for Fe sequestration and storage, playing a key role in Fe homeostasis. Our aim was to study the modalities of overall ferritin synthesis in different organs of young seedlings from the African rice species (Oryza glaberrima) in relation to the putative involvement of abscisic acid (ABA) and oxidative stress in signalling processes.

show abstract

Untitled

Cited by 82 publications

References 31 publications

Photosynthetic changes and oxidative stress caused by iron ore dust deposition in the tropical CAM tree Clusia hilariana

Photosynthetic changes and oxidative stress caused by iron ore dust deposition in the tropical CAM tree Clusia hilariana

QTL mapping for biomass and physiological parameters linked to resistance mechanisms to ferrous iron toxicity in rice

Abscisic acid and oxidative stress implications in overall ferritin synthesis by African rice (Oryza glaberrima Steud.) seedlings exposed to short term iron toxicity

Contact Info

Product

Resources

About