4.7 Article

Antioxidant capacity of Camellia japonica cultivars assessed by near- and mid-infrared spectroscopy

Journal

PLANTA
Volume 249, Issue 4, Pages 1053-1062

Publisher

SPRINGER
DOI: 10.1007/s00425-018-3062-z

Keywords

Infrared spectroscopy; Camellia japonica cultivars; Antioxidants; Phenolic compounds; Flavonoids; Chemometrics

Categories

Funding

  1. European Union (FEDER funds) [POCI/01/0145/FEDER/007265, COMPETE POCI-01-0145-FEDER-016735]
  2. National Funds (FCT/MEC, Fundacao para a Ciencia e Tecnologia and Ministerio da Educacao e Ciencia) under the Partnership Agreement PT2020 [UID/QUI/50006/2013]
  3. National Funds (FCT/MEC, Fundacao para a Ciencia e Tecnologia and Ministerio da Educacao e Ciencia) [PTDC/AGR-PRO/6817/2014]
  4. [NORTE01-0145-FEDER-000024]
  5. Fundação para a Ciência e a Tecnologia [PTDC/AGR-PRO/6817/2014] Funding Source: FCT

Ask authors/readers for more resources

Main conclusionCamellia japonica antioxidant capacity highly differs among its cultivars and could be successfully predicted by near- and mid-infrared spectroscopy.Camellia japonica is a Theaceae family species which are mainly used as an ornamental plant due to its colourful flowers presenting over than 32,000 recognized cultivars. However, this species have been somehow neglected due to the popular tea source, Camellia sinensis. In this study, the antioxidant profile (total phenolic and flavonoid content and total antioxidant capacityTPC, TFC and TAC) of 31 C. japonica cultivars leaves was determined and further assessed by near- and mid-infrared spectroscopy. The leaves' antioxidant profile was revealed to be highly dependent on the cultivars analysed being in some cases distinct even for different trees of the same cultivar. Near- and mid-infrared spectroscopy proved to be suitable techniques to predict the total phenolic and flavonoid content as well as the total antioxidant capacity. The best results were obtained with near-infrared spectroscopy whose root mean square error of the prediction set samples was of 5.7mg of gallic acid/g dry leaf; 3.5mg catechin/g dry leaf and 3.3mM Trolox/g dry leaf for TPC, TFC and TAC (with coefficients of the determinations equal to or higher than 0.93). Moreover, the range error ratios were higher than 15 meaning that the developed partial least-squares models are very good for calibration and quantification determinations according to the guidelines for near-infrared models development and maintenance. In this work, the antioxidant profile of several C. japonica cultivars leaves was determined for the first time, being that a rapid and low cost spectroscopic-based method was also proposed for its determination.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available