摘要:

AbstractTracer kinetics and single cell sampling both suggest that S is compartmented differently in vacuoles of epidermal and mesophyll cells. Cytoplasmic S turns over rapidly, but vacuolar turnover in both cell types is too slow to support plant growth, thus accounting in part for the apparent low mobility of S in mature leaves.

ISSN:0044-3263    

DOI:10.1002/jpln.19951580112

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY

摘要:

AbstractUnder conditions of sulphur deficiency sulphur bound in glucosinolates ofBrassicaspecies can be remobilized by enzymatic cleavage. The trigger mechanism for the control of the myrosinase activity is supposed to be related to the ascorbate/glutathione cycle (Schnug&Haneklaus, 1993). Studies investigating the influence of the sulphur supply on glucosinolate, glutathione and ascorbate concentrations in vegetative plant tissues reveal a close relationship between sulphur status and glucosinolate resp. glutathione contents whereas such interdependencies are less distinctive for ascorbate.

ISSN:0044-3263    

DOI:10.1002/jpln.19951580113

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY

摘要:

AbstractGlutathione (GSH) can be found in plants in considerable amounts. It is very important for numerous metabolic functions and for the detoxification of xenobiotics. The present study was carried out to show the inducibility of glutathione S‐transferase (GST) isozymes in spruce by various substrates commonly used to assay GST activity, Inducers were: chloro‐2,4‐dinitrobenzene (CDNB), 1,2‐dichloro‐4‐nitrobenzene (DCNB), para‐nitrobenzoylchloride (pNBC), fluorodifen and n‐ethylmaleinimide (NEM). Conjugation of CDNB was enhanced by the xenobiotics ranking in the order: CDNB>fluorodife

ISSN:0044-3263    

DOI:10.1002/jpln.19951580114

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY

摘要:

AbstractCell suspension cultures of various crop plants have been used for studying salt and drought stress on the GSH/GSSG‐system, As already recorded for whole plants, cell cultures of different species vary in their glutathione levels. In general, cell cultures of species with relatively high glutathione content are more tolerant to abiotic stress. A high glutathione content alone is not adequate to prevent cell damage and a decrease in cell growth. E.g. the addition of sulphur to stressed cell cultures slightly enhances the GSH content but does not enhance the adaptation of these cells to stress. Thus, the role of glutathione in the adaptation of cells to stress situations seems to be only one component in a more complex response mechanis

ISSN:0044-3263    

DOI:10.1002/jpln.19951580115

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY

摘要:

AbstractThe sensitivity of a glutathione‐deficient mutant of yeast towards thiram and dimethyl dithiocarbamic acid was compared to that of a wild strain. It was shown that the GSH contents of the cell correlated with the toxicity of both drugs, and that glutathione is probably involved in the metabolism of these drug

ISSN:0044-3263    

DOI:10.1002/jpln.19951580116

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY

摘要:

AbstractPot experiments were conducted to examine the response of wheat to the timing of sulphur (S) application. Plants were fertilized at different Stages from sowing to the end of flowering. Plants grown without a basal S supply (severe deficiency), which showed deficiency symptoms at ear emergence, required fertilization with S at the tillering stage if yield losses were to be completely avoided. Moderate and slight S deficiency, which did not result in symptoms until after ear emergence, required rectification at the second node stage for full yield to be obtained. Treatment effects on yield were closely associated with effects on the number of kernels per ear. The results show that where S deficiency occurs, fertilization is required before symptoms become evident if yield reductions are to be avoided.

ISSN:0044-3263    

DOI:10.1002/jpln.19951580117

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY

摘要:

AbstractThe effect of foliar applied elemental sulphur on the individual glucosinolate content of oilseed rape seed was studied. Results show that the proportions of individual glucosinolates remained stable despite changes in the amount of sulphur applied, indicating that controlling sulphur availability cannot be used as a management tool to reduce the toxicity of rapeseed meal.

ISSN:0044-3263    

DOI:10.1002/jpln.19951580118

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY

摘要:

AbstractCystine concentrations (g/16g N) in plant tissue declined more under S deficiency conditions than methionine. In N‐balance trials with rats the negative effect of S deficiency on S amino acid composition of peas and cauliflower resulted in a corresponding decrease of the biological value of the protei

ISSN:0044-3263    

DOI:10.1002/jpln.19951580119

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY

摘要:

AbstractIncreasing the concentration of inorganic N increases the concentration of α‐amino‐N compounds in roots of hydroponically‐grown sugar beet plants. These concentrations can, however, be reduced by increasing the concentration of sulphate in the nutrient so

ISSN:0044-3263    

DOI:10.1002/jpln.19951580120

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY

摘要:

AbstractIn spite of the role of sulphur (S) as an essential plant nutrient, S‐turnover processes in agro‐ecosystems are only partially known. The present paper highlights the feasibility of the use of stable S‐isotope analysis as a tool to evaluate S‐turnover in terrestrial ecosystems. Examples of the usefulness of this approach in forest ecosystems and current research activities to evaluate S transformation processes in agro‐ecosystems

ISSN:0044-3263    

DOI:10.1002/jpln.19951580121

出版商:WILEY‐VCH Verlag    

年代:1995

数据来源: WILEY