Crop Science
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Figures Only
Right arrow Full Text Free
Right arrow Full Text (PDF) Free
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Related articles in Crop Science
Right arrow Similar articles in this journal
Right arrow Similar articles in Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Web of Science (1)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Gray, D. E.
Right arrow Articles by Pallardy, S. G.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Gray, D. E.
Right arrow Articles by Pallardy, S. G.
Agricola
Right arrow Articles by Gray, D. E.
Right arrow Articles by Pallardy, S. G.
Related Collections
Right arrow Other Crops
Right arrow Plant Analysis
Crop Science 41:1159-1161 (2001)
© 2001 Crop Science Society of America

CROP ECOLOGY, MANAGEMENT & QUALITY

Quantification of Root Chicoric Acid in Purple Coneflower by Near Infrared Reflectance Spectroscopy

D. E. Gray*,a, C. A. Robertsc, G. E. Rottinghausd, H. E. Garrettb and S. G. Pallardyb

a Herb Pharm, Williams, OR, 97544
b School of Natural Resources
c Dep. of Agronomy
d College of Veterinary Medicine, Univ. of Missouri, Columbia, MO 65211

* Corresponding author (dgray{at}herb-pharm.com)

Purple coneflower [Echinacea purpurea (L.) Moench] is an increasingly popular crop because of its value in the U.S. botanical industry. At present, there is no rapid method of analyzing it for chicoric acid, the predominant phenolic acid associated with immunostimulation in humans. The objective of this study was to quantify chicoric acid in purple coneflower roots by near infrared (NIR) reflectance spectroscopy. One hundred sixty-nine plants were harvested and their root tissues analyzed for chicoric acid by high performance liquid chromatography (HPLC). Root samples were scanned between 1100 and 2498 nm and reflectance data recorded. The HPLC data were regressed against infrared spectra to develop empirical prediction equations. The optimum prediction equation produced coefficients of determination for calibration and cross validation of 0.90 and 0.86, respectively. The mean chicoric acid concentration was 8.29 g kg DM-1, and the standard errors of calibration and cross validation were 0.89 and 1.06 g kg DM-1, respectively. We conclude that NIR reflectance spectroscopy can accurately quantitate chicoric acid in purple coneflower.


Related articles in Crop Science:

This issue in Crop science

Crop Science 2001 41: 991. [Full Text]  





HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 2001 by the Crop Science Society of America.