Plant Uptake, Transport and Metabolism

Morrison, Ian N.; Cohen, Aharon S.

doi:10.1007/978-3-540-38519-6_10

Cited by 5 publications

(5 citation statements)

References 137 publications

(127 reference statements)

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“…For cadmium, the absence of significant correlations could be explained by the following hypothesis, with two statements: (1) the plants reflect in their organs the concentration of the metal in the water, but not that in the sediment; and (2) there is no correlation between cadmium concentrations in the water and in the sediment. Laboratory experiments demonstrate that cadmium contents in plants reflect concentrations in the water: Morrison & Cohen (1980) and Kabata‐Pendias & Pendias (1984) in terrestrial plants, Lyngby & Brix (1984) in the marine phanerogam Zostera marina and Chen & Chen (1993) and Collard & Matagne (1994) in algae. Cadmium in seawater is found mainly as complexes with the chloride ion (CdCl + and CdCl 2 ), which are poorly adsorbed by the sorbing components of the sediment (McComish & Ong, 1988).…”

Section: Discussionmentioning

confidence: 99%

Heavy Metal Contents in Soft‐Bottom Marine Macrophytes and Sediments Along the Mediterranean Coast of Spain

2000

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Abstract. Hg, Cd, Pb and Zn concentrations were determined in sediment and in tissues of five species of soft‐bottom marine macrophytes (Posidonia oceanica, Cymodocea nodosa, Zostera noltii, Ruppia cirrhosa and Caulerpa prolifera) along the Spanish Mediterranean coast. Levels of metals were low in most of the sampling stations and similar to those found by other authors in uncontaminated zones. Certain locations, however, showed some degree of contamination (Cambrils, Almassora, Alacant, Mar Menor and El Portús). In Santa Pola we found high contents of metals in one sample of sediment due to the high proportion of the fine fraction (particules < 63µm) and organic matter, but not in the seagrass species. Mercury and zinc concentrations in the sediment are correlated to those in at least some anatomic fractions of Posidonia oceanica, Cymodocea nodosa and Caulerpa prolifera, suggesting that these species reflect the levels of these metals in the environment. Lead contents in the alga Caulerpa prolifera are also correlated to those in the sediment, while no significant correlations were obtained for cadmium. Among the species studied, Posidonia oceanica and Cymodocea nodosa seem to be better biomonitors than Caulerpa prolifera.

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Section: Discussionmentioning

confidence: 99%

Heavy Metal Contents in Soft‐Bottom Marine Macrophytes and Sediments Along the Mediterranean Coast of Spain

2000

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“…These different mixing stages are shown in Figure 3.8, for both a continuous discharge and a chemical spill in a 80 Transport, accumulation and transformation processes river. The description of the mixing processes is restricted to river systems, for reviews of transport processes in non-river systems, see [6].…”

Section: Intramedia Transport In Watermentioning

confidence: 99%

“…Understanding bioaccumulation in these primary producers is therefore important. Metal uptake from soil in vegetables has been studied [80], but in the following we will focus on organic contaminants. When exploring xenobiotic uptake in plants, it is useful to distinguish between uptake into roots and uptake into foliage.…”

Section: Accumulation In Terrestrial Plantsmentioning

confidence: 99%

Transport, Accumulation and Transformation Processes

Sijm¹,

Rikken²,

Rorije³

et al. 2007

Risk Assessment of Chemicals

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“…Translocation study. It is generally accepted that the movement of those foliar -applied herbicides that are translocated symplastically takes place in the phloem along with photosynthates (20), although the actual mechanism of translocation in the phloem has not been fully resolved (17). There is ample evidence that the translocation of photosynthetic assimilates in plants is reduced under conditions of moderate to severe moisture stress (5), and several reports have demonstrated that water stress can inhibit the translocation of certain herbicides (2,6,11,15).…”

Section: Growth Reduction Abmentioning

confidence: 99%

Effect of Moisture Stress on Wild Oat (Avena fatua) Response to Diclofop

Akey¹,

Morrison²

1983

Weed sci.

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The effect of moderate moisture stress on the activity of the methyl ester of diclofop {2-[4-(2,4-dichlorophenoxy)phenoxy] propanoic acid} applied to wild oat (Avena fatuaL.) and the influence of morphological and physiological factors on the activity of the herbicide on stressed plants were investigated in growth-room experiments. Wild oat was grown in very fine sandy loam brought to a gravimetric soil moisture content (SMC) of 20% (water potential of -0.3 bars) or 10% (-6.5 bars) prior to herbicide treatment. The activity of diclofop on wild oat was slightly, but significantly, reduced when the SMC was increased from 10 to 20% immediately after spraying. Maintaining the SMC at 10% after spraying further reduced the activity of the herbicide. Wild oat plants grown at 20% SMC had 22% greater leaf area and retained 23% more herbicide than plants grown at 10% SMC. Penetration of the methyl ester of14C-diclofop into wild oat grown at 20 or 10% SMC did not differ significantly 12, 24, or 48 h after application. Stressed and unstressed plants did not differ significantly in the metabolism of the methyl ester of14C-diclofop. However, growth at a low SMC prior to treatment decreased the proportion of the radiolabeled herbicide recovered in the apex, third leaf, and tillers of wild oat. This may partially account for the reduced activity of this herbicide on wild oat subjected to moisture stress.

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Plant Uptake, Transport and Metabolism

Cited by 5 publications

References 137 publications

Heavy Metal Contents in Soft‐Bottom Marine Macrophytes and Sediments Along the Mediterranean Coast of Spain

Heavy Metal Contents in Soft‐Bottom Marine Macrophytes and Sediments Along the Mediterranean Coast of Spain

Transport, Accumulation and Transformation Processes

Effect of Moisture Stress on Wild Oat (Avena fatua) Response to Diclofop

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