Leaf-goldenning induced by high light inFicus microcarpa L. f., a tropical fig

Yamasaki, Hideo; Heshiki, Rika; Ikehara, Norikatsu

doi:10.1007/bf02344341

Cited by 31 publications

(24 citation statements)

References 29 publications

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“…Heavy metal induced changes in the phenolic compounds may further affect their functions in plant cells. Phenolic compounds, including tannins, are often involved in responses to different kinds of abiotic and biotic stresses (Rivero 2001;Booker et al 1996;Dixon and Paiva 1995;Yamasaki et al 1995). It is reported that in plant systems, phenolics can act as antioxidants by donating electrons to guaiacol-type peroxidases (GuPXs) for the detoxification of H 2 O 2 produced under stress conditions including heavy metal stress (Sakihama et al 2002).…”

Section: Resultsmentioning

confidence: 99%

Influence of Heavy Metals on the Carbohydrate and Phenolics in Mangrove, Aegiceras corniculatum L., Seedlings

Guangqiu

Yan

2007

Bull Environ Contam Toxicol

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Mangrove forest, a complex intertidal ecosystem distributed in the tropics and subtropics, appear to possess a remarkable capacity to retain heavy metals (Badarudeen et al. 1996;Machado et al. 2002;Alongi et al. 2004). Recently, mangrove forests have been shown to play an important role in the biogeochemistry of trace metal contaminants in tropical coastal areas, and are considered to have the capacity to act as a sink or buffer and to remove or immobilize heavy metals before they reach nearby aquatic ecosystems (Tam and Wong 1996). However, most of the attention has been paid to the distribution and speciation of heavy metals in mangrove plants and sediments. We have little knowledge about why mangroves could inhabit in the heavily heavy-metal polluted mangrove swamp. Therefore it is important to evaluate the response of mangroves to the heavy metals stress, so as to have an in-depth understand about the high heavy metals tolerance of mangroves.In this study, we tested the variation of foliar carbohydrate and provided the first comprehensive description of the variation in the contents of phenolic compounds in mangrove (A. corniculatum L.) seedlings under heavy metal stress. We also related the variation in the content of phenolic compounds to the antioxidant activities in response to heavy metal in A. corniculatum L. seedlings. We aimed to investigate: (1) whether heavy metals induce changes in foliar carbohydrate and phenolic metabolism and, if so (2) could carbohydrate and phenolics be indicators of heavy metal stress of A. corniculatum L. seedlings and, (3) do they do any help to the high heavy metals tolerance of mangroves? Materials and MethodsSeeds of A. corniculatum L. were collected from Yunxiao mangrove forest (latitude 23°55¢180 †, longitude 117°25¢212 †) of Fujian, China. After 2 months of cultivation in greenhouse with natural illumination, the relative humidity 85%, and the temperature ranging from 26 to 32°C, healthy seedlings similar in apparent health, height (106 ± 19 mm), and leaf number (3 ± 0.41) (mean ± SE) were selected for sandy culture in plastic pots (35 cm diameter · 15 cm deep) with Hoagland's nutrient medium (pH~6.0). Metal salts were supplied with CuCl 2

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Section: Resultsmentioning

confidence: 99%

Influence of Heavy Metals on the Carbohydrate and Phenolics in Mangrove, Aegiceras corniculatum L., Seedlings

Guangqiu

Yan

2007

Bull Environ Contam Toxicol

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“…11 5,1997 juvenile leaves (Fig. 5) or in ascorbate-deficient mutants (Yamasaki et al, 1995a(Yamasaki et al, , 1995bConklin et al, 1996). It is plausible that flavonoids support the primary detoxification system as a backup defense mechanism of vascular plants.…”

Section: Discussionmentioning

confidence: 98%

“…Peak areas were monitored at 370 nm with a Chromatopac integrator (C-R3A, Shimadzu, Kyoto, Japan). The identification of flavonoids was confirmed by cellulose TLC (Funacel SF, Funakoshi, Tokyo, Japan) as previously described (Yamasaki et al, 1995a).…”

Section: Hplc and Tlc Analysismentioning

confidence: 99%

Flavonoid-Peroxidase Reaction as a Detoxification Mechanism of Plant Cells against H2O2

1997

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“…Artificial bleaching was induced by maintaining the corals under water and exposing a small (1.0 cm 2 ) smooth surface of each sample to 1500 µmol photons m -2 s -1 of light while covering the rest of the coral surface with aluminum foil for 6 h (method adapted from that of Yamasaki et al [1995] for tropical higher plants). Partial colony bleaching, similar that induced by this experimental procedure, is common during sublethal thermal stress events, as evidenced on the Great Barrier Reef (Heron Island) in February 2002 (van Woesik pers.…”

Section: Abstract: Corals · Bleaching · Water Flow · Recoverymentioning

confidence: 99%

Water flow facilitates recovery from bleaching in the coral Stylophora pistillata

Nakamura¹,

Yamasaki²,

Woesik³

2003

Mar. Ecol. Prog. Ser.

120

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Leaf-goldenning induced by high light inFicus microcarpa L. f., a tropical fig

Cited by 31 publications

References 29 publications

Influence of Heavy Metals on the Carbohydrate and Phenolics in Mangrove, Aegiceras corniculatum L., Seedlings

Influence of Heavy Metals on the Carbohydrate and Phenolics in Mangrove, Aegiceras corniculatum L., Seedlings

Flavonoid-Peroxidase Reaction as a Detoxification Mechanism of Plant Cells against H2O2

Water flow facilitates recovery from bleaching in the coral Stylophora pistillata

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