caa a22 4500 477110185 CHVBK 20180405111606.0 cr unu---uuuuu 170330e19960401xx s 000 0 eng 10.1007/BF00012066 doi (NATIONALLICENCE)springer-10.1007/BF00012066 Responses of two wheat varieties to sulphur addition and diagnosis of sulphur deficiency [Elektronische Daten] [F. Zhao, M. Hawkesford, A. Warrilow, S. McGrath, D. Clarkson] Sulphur deficiency has become increasingly widespread in wheat in the U.K. Growth, nutrient content and biochemical responses to S and N supply of a breadmaking wheat variety (Hereward) and a non-breadmaking variety (Riband) were investigated in a pot experiment. Shoot dry matter (DM) at stem extension (Zadok's GS 37) and at maturity was increased markedly by S. Grain production of the Riband variety was more susceptible to the imbalance of N to S than the Hereward variety. At GS 37, the concentrations of total S and sulphate-S of shoots, chlorophyll meter readings and the concentrations of glutathione of the uppermost fully expanded leaves were increased significantly by increasing S supply, whereas the concentrations of nitrate and amides were decreased by S. The greatest relative changes in response to S supply were those of the glutathione and asparagine concentrations. Riband also showed greater response to S than Hereward. Critical values of various diagnostic indices at GS 37 were derived from the relationships between DM yield and different indices. The two varieties showed similar diagnostic curves except that for the ratio of total N to total S (N:S) in shoots. Either total S or sulphate-S can be used alone as a good indicator of deficiency, and with values of 1500 and 190 mg kg-1 DM in shoots for the two indices respectively. There was also a well defined relationship between DM yield and the glutathione concentration, with a critical value of 240 nmol g-1 FW. There were no advantages of using % of total S as sulphate-S. Shoot N:S ratio was found to be less accurate in predicting S deficiency than total S or sulphate-S. For prognostic purposes, a much higher S status at GS 37 was required to ensure no losses of DM yield due to S deficiency at maturity. Kluwer Academic Publishers, 1996 diagnosis nationallicence glutathione nationallicence N:S ratio nationallicence sulphur nationallicence sulphate nationallicence wheat variety nationallicence Zhao F. Soll Science Department, IACR-Rothamsted, AL5 2JQ, Harpenden, Herts, UK aut Hawkesford M. Department of Agricultural Sciences, University of Bristol, IACR-Long Ashton, BS18 9AF, Bristol, UK aut Warrilow A. Department of Agricultural Sciences, University of Bristol, IACR-Long Ashton, BS18 9AF, Bristol, UK aut McGrath S. Soll Science Department, IACR-Rothamsted, AL5 2JQ, Harpenden, Herts, UK aut Clarkson D. Department of Agricultural Sciences, University of Bristol, IACR-Long Ashton, BS18 9AF, Bristol, UK aut Plant and Soil Kluwer Academic Publishers; http://www.wkap.nl 181/2(1996-04-01), 317-327 0032-079X 181:2<317 1996 181 11104 https://doi.org/10.1007/BF00012066 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00012066 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhao F. Soll Science Department, IACR-Rothamsted, AL5 2JQ, Harpenden, Herts, UK aut NATIONALLICENCE 700 1- Hawkesford M. Department of Agricultural Sciences, University of Bristol, IACR-Long Ashton, BS18 9AF, Bristol, UK aut NATIONALLICENCE 700 1- Warrilow A. Department of Agricultural Sciences, University of Bristol, IACR-Long Ashton, BS18 9AF, Bristol, UK aut NATIONALLICENCE 700 1- McGrath S. Soll Science Department, IACR-Rothamsted, AL5 2JQ, Harpenden, Herts, UK aut NATIONALLICENCE 700 1- Clarkson D. Department of Agricultural Sciences, University of Bristol, IACR-Long Ashton, BS18 9AF, Bristol, UK aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers; http://www.wkap.nl 181/2(1996-04-01), 317-327 0032-079X 181:2<317 1996 181 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer