• Login
  • Help Guide
View Item 
  •   JOOUST IR Home
  • Journal Articles
  • School of Agriculture and Food Science
  • View Item
  •   JOOUST IR Home
  • Journal Articles
  • School of Agriculture and Food Science
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Effect of pH and magnesium on colour development and anthocyanin accumulation in tuberose florets

Thumbnail
View/Open
Muriithi_Effect of pH and magnesium on colour development and anthocyanin Muriithi_Wamocho_Njoroge.pdf (87.29Kb)
Publication Date
2009
Author
Muriithi, Alice Nakhumicha
WAMOCHO, L. S.
NJOROGE, J. B. M.
Type
Other
Metadata
Show full item record
Citation

African Crop Science Conference Proceedings, Vol. 9. pp. 227 - 234

Abstract/Overview

Anthocyanins are a group of plant pigments responsible for colors ranging from red to violet and blue. Anthocyanins are pigments that accumulate in the vacuoles of plant epidermal cells. Chroma and hue are dependent on conditions inside and outside the vacuoles. Also conditions within the vacuole that facilitate formation of complexes with several metal ions. The aim of this study was to examine changes in accumulation of anthocyanins and the resultant colour in tuberose (Polianthes tuberosa Linn.) after application of amendments to the soil. Treatments were applied six weeks after planting as a top dress. Magnesium was given as magnesium nitrate and nitrogen was given as calcium ammonium nitrate CAN was neutral and ammonium sulphate (AS) was acidic. Soil and plant tissues were analysed every two weeks for nitrogen, phosphorus, potassium, magnesium, and pH. Colour was determined using a photoelectric tri-stimulus colorimeter and expressed in CIE L*a*b* colour space coordinates. In addition, chlorophyll and anthocyanins in the florets were quantified. The amendments lowered the soil pH, especially for the AS and CAN. However, chroma and hue values as determined by the space coordinates, as well as the concentrations of anthocyanins in the floret, were not significantly linked to the soil pH following the amendments. Equally, the tissue elements and chlorophyll contents were similar between the amendments. The results of this study show that supplying magnesium through fertiliser application to the soil does not necessarily increase accumulation of Mg in tissues, and may ultimately not lead to accumulation of anthocyanins.

Subject/Keywords
Chroma; hue; metal complexes; Polianthes tuberosa; plant pigments
Publisher
African Crop Science Conference Proceedings, Vol. 9. pp. 227 - 234
ISSN
ISSN 1023-070X/2009
Permalink
http://62.24.102.115:8080/xmlui/handle/123456789/989
Collections
  • School of Agriculture and Food Science [179]

Browse

All of JOOUST IRCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

LoginRegister

Statistics

View Usage Statistics

Contact Us

Copyright © 2023-4 Jaramogi Oginga Odinga University of Science and Technology (JOOUST)
P.O. Box 210 - 40601
Bondo – Kenya

Useful Links

  • Report a problem with the content
  • Accessibility Policy
  • Deaccession/Takedown Policy

TwitterFacebookYouTubeInstagram

  • University Policies
  • Access to Information
  • JOOUST Quality Statement