Partitioning and redistribution of sulphur during S-stress in Macroptilium atropurpureum cv. Siratro

A - Papers appearing in refereed journals

Bell, C. I., Clarkson, D. T. and Cram, W. J. 1995. Partitioning and redistribution of sulphur during S-stress in Macroptilium atropurpureum cv. Siratro. Journal of Experimental Botany. 46 (1), pp. 73-81. https://doi.org/10.1093/jxb/46.1.73

AuthorsBell, C. I., Clarkson, D. T. and Cram, W. J.
Abstract

During the first 7 d of sulphate-deprivation stored SO42- was redistributed and assimilated into organic forms in the tropical legume Macroptilium atropurpu-reum cv. Siratro. However, whilst the sulphate content of all tissues declined after removing the external SO42- supply this was slowest in mature leaves. By contrast, the total S content of mature leaves declined markedly in the absence of external sulphate whilst that of both young leaves and roots increased. Furthermore, when radiolabelled SO42- was applied to abraded surfaces of mature leaves, most of the translocated label was recovered in the root following 2 d SO42- deprivation. By contrast, radiolabelled SO42-applied to young leaves was mostly retained in these tissues and not translocated.

Within 3 d of removing the SO42- supply there was a large increase in extractable APS-sulphotransferase activity in roots accompanied by a decline in nitrate reductase activity, but these effects were not seen in leaves. Five days after the removal of SO42- there was a large increase in the content of asparagine in roots.

The results are discussed in relation to the co-ordination of NO3- and SO42- uptake and assimilation and the partitioning of sulphur during S-stress.

Year of Publication1995
JournalJournal of Experimental Botany
Journal citation46 (1), pp. 73-81
Digital Object Identifier (DOI)https://doi.org/10.1093/jxb/46.1.73
Open accessPublished as bronze (free) open access
Funder project or code212
Publisher's version
Output statusPublished
Publication dates
Print01 Jan 1995
Publication process dates
Accepted14 Oct 1994
Copyright licensePublisher copyright
ISSN0022-0957
PublisherOxford University Press (OUP)

Permalink - https://repository.rothamsted.ac.uk/item/870z7/partitioning-and-redistribution-of-sulphur-during-s-stress-in-macroptilium-atropurpureum-cv-siratro

42 total views
18 total downloads
2 views this month
0 downloads this month
Download files as zip