A PRELIMINARY-STUDY ON THE EFFECTS OF NITROGEN SUPPLY ON THE GROWTH-INVITRO OF 9 POTATO GENOTYPES (SOLANUM SPP)

Authors
Citation
Ne. Evans, A PRELIMINARY-STUDY ON THE EFFECTS OF NITROGEN SUPPLY ON THE GROWTH-INVITRO OF 9 POTATO GENOTYPES (SOLANUM SPP), Journal of Experimental Botany, 44(261), 1993, pp. 837-841
Citations number
18
Categorie Soggetti
Plant Sciences
ISSN journal
00220957
Volume
44
Issue
261
Year of publication
1993
Pages
837 - 841
Database
ISI
SICI code
0022-0957(1993)44:261<837:APOTEO>2.0.ZU;2-7
Abstract
Cultures of nine potato genotypes (seven Solanum tuberosum, one S. spa rsipilum and one S. oplocense genotypes) were examined for their respo nse to growing on medium containing either 60 mol m-3, 40 mol m-3 or 2 0 mol m-3 nitrogen. Genotypes differed in their response to nitrogen. Reducing the nitrogen regime tended to produce taller plants with long er internodes, shoots had larger leaves but contained less chlorophyll . No change in fresh weight or number of nodes was observed. Genotype x nitrogen interactions were significant for chlorophyll content, shoo t length and internode length. Results suggest that the changes observ ed were as a result of changes in the total nitrogen level rather than changes in the ammonium: nitrate ratio. This study suggests that for certain potato genotypes, nitrogen levels in MS medium are too high fo r producing desirable microplants in terms of leaf area and shoot leng th.