Home > VIII International Postharvest Symposium: Enhancing Supply Chain and Consumer Benefits – Ethical and Technological Issues > Effectiveness of green tea extract on the native microflora of ready-to-eat beetroot: evaluation of different application methods

Articles

Effectiveness of green tea extract on the native microflora of ready-to-eat beetroot: evaluation of different application methods

Article number

1194_126

Pages

895 – 902

Language

English

Abstract

The effectiveness of green tea extracts against the native microflora of beetroot and the impact of the application methodology on its antimicrobial efficiency were evaluated.
Beetroots were washed, peeled, disinfected with 200 ppm sodium hypochlorite and grated.
Solutions of green tea at 0.43, 0.85 and 1.70% were applied by two different methodologies: spraying (TS1, TS2 and TS3, respectively) and dipping (TD1, TD2 and TD3, respectively), with the same volume of retained solution in all cases.
Control samples were treated with sterile distilled water (CS and CD). Samples were packaged in 10 g-units (PD960, Cryovac, Argentina) and stored at 15°C for 96 h.
Aerobic mesophilic bacteria (AMB) and yeasts and molds (Y&M) were evaluated.
Initial counts were 4.4±0.4 and 3.1±0.2 log CFU g^-1, respectively.
Control samples, regardless the application method, presented a continuous AMB and Y&M growth, reaching values of 9.4±0.4 and 6.3±0.3 log CFU g^-1, respectively, at 96 h.
Spraying methodology did not result efficient as TS1-TS3 samples presented AMB and Y&M behavior similar to the control.
Dipping methodology led to initial reductions of 1.2-1.8 log cycle for AMB, depending on tea concentration; and 1 log for Y&M, regardless of concentration.
After that, TD1 and TD2 samples showed significant AMB and Y&M regrowths, reaching counts similar to CD at 96 h, while TD3 counts continued declining until undetectable levels during the first 24h followed by a slight regrowth, reaching AMB and Y&M counts 3.8 and 1.2 lower than CD at 96 h.
Differences found between application methodologies could be associated with the high surface:volume ratio of grated beetroot, being the dipping more efficient than spraying to achieve complete contact between antimicrobials and product surface.
This work allowed us to select the tea extract concentration that effectively controls the development of beetroot microflora as well as the application methodology.

Publication

VIII International Postharvest Symposium: Enhancing Supply Chain and Consumer Benefits – Ethical and Technological Issues

Authors

L. Martínez-Melo, M.V. Fernandez, G. Finten, R.J. Jagus, M.V. Agüero

Keywords

Beta vulgaris, natural antimicrobials, microbiological quality

Full text

https://doi.org/10.17660/ActaHortic.2018.1194.126

Groups involved

Division Postharvest and Quality Assurance

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167. Effect of temperature and cut size on the volatile organic compound profile, and expression of Chorismate synthase in fresh-cut melon

168. Quality changes in fresh-cut mango cubes submitted to different gas partial pressure of active MAPs

169. Potentials of Thai tropical edible flowers as fresh cut salad mix

S. Sommano | R. Suksathan | G. Colelli | W. Kumpuan

170. The epic of postharvest biology and technology: lessons and challenges for the future

J.-C. Pech

171. The effect of sugar starvation on the metabolic response of isolated lamb’s lettuce (Valerianella locusta L.) cells

V. Baiye Mfortaw Mbong | M.L.A.T.M. Hertog | A.H. Geeraerd | B.M. Nicolaï

172. Gradients of adenylate nucleotides and energy charge within ‘Rocha’ pear fruit

D.P.F. Almeida | A.A. Saquet

173. Postharvest deformation of cucumber fruit associated with water movement and cell wall degradation

T. Nishizawa | T. Okada | Y. Suzuki | Y. Motomura | T. Aikawa

174. Characterization and control of“bottom box water spot”, a new citrus rind disorder in Spain

B. Orihuel-Iranzo | I. Navarro | J. Bretó | M.C. Mottura

175. New technologies for storage of horticultural products – there is more to adoption than availability!

C.B. Watkins

176. Excellence in dynamic controlled atmosphere storage based on the respiratory quotient: leakage correction

N. Bessemans | P. Verboven | B.E. Verlinden | B.M. Nicolaï

177. Physiological and biochemical dynamics of sweet potato as affected by controlled atmosphere storage treatments

S. Sowe | S. Landahl | R. Tosetti | L.A. Terry

178. In-situ determination of external quality parameters in intact summer squash using near-infrared reflectance spectroscopy

179. Discrete ex situ and continuous in situ real-time respiration rate measurements of fresh produce using a novel automated dynamic approach

E.R. Collings | M.C. Alamar | K. Cools | J.J. Ordaz-Ortiz | L.A. Terry

180. Time-resolved reflectance spectroscopy reveals different texture characteristics in ‘Braeburn’, ‘Gala’ and ‘Kanzi^®‘ apples

181. Grading banana by VNIR hyperspectral imaging spectroscopy

B. Diezma | S. Franco | L. Lleó | T. Presečki | J.M. Roger

182. Ethical and technical issues for transport, distribution and retail sale of fresh horticultural crops

P.M.A. Toivonen

183. Using volatile organic compounds to monitor shelf-life in rocket salad

N.D. Spadafora | L. Cammarisano | H.J. Rogers | C.T. Müller

184. A multi-parameter approach to vent hole design for cartons packed with internal packaging

T.M. Berry | T.S. Fadiji | T. Defraeye | C. Coetzee | U.L. Opara

185. Vibration forces in the course of banana transport from a packinghouse to a central supply market

R.J. Bender | I. Muller

186. Wind tunnel airflow measurements on plastic apple storage bins

187. Effect of the transport vibration on the generation of the color reversion in blackberry fruit

188. Using the genetic diversity of plum to explore the complexity of fruit ripening

M. Farcuh | P. Saha | E. Blumwald

189. Effect of light wavelength and TiO₂ on photocatalytic removal of ethylene under low oxygen and high humidity storage conditions

190. Postharvest treatments to improve quality and safety of locally-grown vegetables stored at non-optimum temperatures

191. Elucidating the wound signal mechanism in fresh-cut produce: scientific implications and opportunities for practical applications and novel technologies

L. Cisneros-Zevallos

192. Influence of ripening stage on phytochemicals and antioxidant activity of prickly pear (O. megacantha ‘Liria’)

E. Ríos-Alegría | E. Mercado-Silva | J.C. Mondragón | M.E. Vázquez-Barrios | D.M. Rivera-Pastrana

193. Chemical characterization, bioactive compounds, centesimal composition and mineral contents in abiurana, a native fruit of the Brazilian Atlantic Forest

A.P.G. da Silva | A.C.A. Miguel | A.P. Jacomino

194. Techniques to assess biological variation in destructive data

L.M.M. Tijskens | R.E. Schouten | G. Jongbloed | P.J. Konopacki

195. Optimizing air flow distribution in maritime refrigerated containers

L.J.S. Lukasse | M.G. Staal

196. Understanding the regulation of texture degradation during apple softening – a kinetic modelling approach

197. Respiratory parameters of huitlacoche (Ustilago maydis) under modified atmosphere conditions

S. Valle-Guadarrama | T. Espinosa-Solares | I.L. López-Cruz | R. Sánchez-Flores

198. Apples from Monalisa – biological variation of firmness behaviour in storage and shelf life

L.M.M. Tijskens | R.E. Schouten | A. Zanella | N. Sadar

199. Consumer demands and postharvest innovation: the new generation

I.B. Ferguson

200. Is the physiological maturity at harvest influencing nectarine flavour after cold storage?

201. Comparative analysis of fruit flavour and proteomic patterns of Fragaria × ananassa in response to super-atmospheric oxygen, low-oxygen and passive modified atmospheres

202. Control of superficial scald and analysis of α-farnesene and conjugated trienols in ‘Annurca’ apple

203. Quality and nutritional properties of ready-to-eat blackberry from different cultivars and pedoclimatic conditions

204. Physiological and biochemical characterization of sweet granadilla (Passiflora ligularis JUSS) at different locations

D.S. Espinosa | L.M. Melgarejo | M.S. Hernández | S.E. Melo | J.P. Fernández-Trujillo

205. Preconditioning treatment induces changes in plasma membrane lipid composition and vanadate-sensitive ATPase activity of zucchini fruit during cold storage

F. Palma | F. Carvajal | R. Jiménez-Muñoz | A. Pulido | D. Garrido

206. Changes in the biosynthesis of cuticular waxes during postharvest cold storage of zucchini fruit (Cucurbita pepo L.)

F. Carvajal | F. Palma | R. Jiménez-Muñoz | A. Pulido | D. Garrido

207. Effect of microwave treatments on the quality of a smoothie

208. Bactericidal effect of four types of electrolyzed water on fresh-cut vegetables

H. Izumi | A. Inoue

209. Changes in quality and maturity of ‘Duke’ and ‘Brigitta’ blueberries during fruit development: postharvest implications

210. Invertase and oxidative enzymes activities during cold storage of carrots

D.V. Chaves | J. Karsten | F.L. Finger | F.L. Zanatta

211. Ammonia accumulation in plant tissues: a potentially useful indicator of postharvest physiological stress

M.L. Amodio | G. Colelli | M.I. Cantwell

212. Effect of plant-based coatings on the volatile profile of ‘Pérola’ pineapple