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B. H. Niazi J. Rozema R. A. Broekman M. Salim 《Journal of Agronomy and Crop Science》2000,184(2):101-110
A pot experiment was conducted under greenhouse conditions with two subspecies of beet, fodderbeet ( Beta vulgaris cv. Majoral) and seabeet ( Beta maritima ), under saline conditions. Growth and physiological parameters (dry weight, leaf area, water relations and net photosynthesis) were recorded. The two subspecies responded differently in terms of growth parameters. Plant growth was significantly reduced at 400 m m NaCl, while no significant growth reduction occurred at 200 m m NaCl. Fairly high values of relative growth rate were associated with the leaf area of the cultivars. The water content of the shoot decreased with plant age. The fodderbeet cultivar Majoral showed a significant increase in dry matter at 200 m m NaCl after 5 weeks. This growth improvement may be related to the better adaptation of the plants under saline conditions. 相似文献
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E Rozema R Popescu H Sonderegger CW Huck J Winkler G Krupitza E Urban B Kopp 《Journal of agricultural and food chemistry》2012,60(29):7204-7210
Sphingolipid metabolites regulate cellular processes such as cell proliferation, differentiation, and apoptosis. In this study, glucocerebrosides (GluCer) from rhizomes of Arisaema amurense and Pinellia ternata were fully characterized using 1- and 2-dimensional nuclear magnetic spin resonance (NMR) and circular dichroism (CD) spectroscopy and tandem collision-induced dissociation mass spectrometry (ESI-MS/CID-MS). Three new acylated and seven known GluCer were elucidated with 4,8-sphingadienine (4,8-SD, d18:2) as backbone. 4,8-SD is a metabolite after enzymatical hydrolysis of GluCer in the gut lumen. In this study, 4,8-SD was hydrolyzed from GluCer and chromatographically purified on silica gel. In contrast to the GluCer, 4,8-SD showed cytotoxic effects in the WST-1 assay. GluCer with 4,8-SD as sphingoid backbone are present in plants consumed as food, such as spinach, soy, and eggplant. 相似文献
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Jelte Rozema Ed Buys Marinus L. Otte Rob A. Broekman Wilfried H. O. Ernst 《植物养料与土壤学杂志》1991,154(4):307-313
Concentrations of Na, K, Ca, Mg, Fe, Mn, and Zn were determined in polluted estuarine (Western Scheldt) and non-polluted (Eastern Scheldt) salt marsh soil, in the shoot tissue of plants of Spartina anglica and in the excretion of the salt glands of Spartina anglica. Excretion of ions by the salt glands of Spartina anglica was analysed with increasing salinity (0, 300, and 500 mM NaCl) and with increasing values of the redox potential of the salt marsh soil (from ?300 mV to +600 mV). Salt glands of Spartina anglica, growing in containers filled with salt marsh soil in the greenhouse excreted Na-ions at a rate of 1.0–1.8 mmol Na+ g?1 dry wt of the shoot tissue over a period of 18 days implying that about every 6–18 days the amount of Na+ present in the shoot tissue is being removed by the salt glands. The excretion rate of K-ions was 0.02–0.14 mmol g?1 dry wt/18 days. Zinc ions are excreted by the salt glands to such a rate (0.03–0.11 μmol g?1 dry wt/18 days) that every 36–900 days the amount of zinc present in the leaves is removed. There was no relation between excretion of Zn ions by the plants and the concentration of zinc in the soil. The excretion of Fe and Mn is reported and was found to be related to increasing values of the redox potential. 相似文献
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Hendrien Beukema Finn Danielsen Grégoire Vincent Suryo Hardiwinoto Jelte van Andel 《Agroforestry Systems》2007,70(3):217-242
Plant and bird diversity in the Indonesian jungle rubber agroforestry system was compared to that in primary forest and rubber
plantations by integrating new and existing data from a lowland rain forest area in Sumatra. Jungle rubber gardens are low-input
rubber (Hevea brasiliensis) agroforests that structurally resemble secondary forest and in which wild species are tolerated by the farmer. As primary
forests have almost completely disappeared from the lowlands of the Sumatra peneplain, our aim was to assess the contribution
of jungle rubber as a land use type to the conservation of plant and bird species, especially those that are associated with
the forest interior of primary and old secondary forest. Species-accumulation curves were compiled for terrestrial and epiphytic
pteridophytes, trees and birds, and for subsets of ‘forest species’ of terrestrial pteridophytes and birds. Comparing jungle
rubber and primary forest, groups differed in relative species richness patterns. Species richness in jungle rubber was slightly
higher (terrestrial pteridophytes), similar (birds) or lower (epiphytic pteridophytes, trees, vascular plants as a whole)
than in primary forest. For subsets of ‘forest species’ of terrestrial pteridophytes and birds, species richness in jungle
rubber was lower than in primary forest. For all groups, species richness in jungle rubber was generally higher than in rubber
plantations. Although species conservation in jungle rubber is limited by management practices and by a slash-and-burn cycle
for replanting of about 40 years, this forest-like land use does support species diversity in an impoverished landscape increasingly
dominated by monoculture plantations. 相似文献
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