The development of tea blister caused by Exobasidium vexans in tea (Camellia sinensis) correlates with the reduced accumulation of some antimicrobial metabolites and the defence signals salicylic and jasmonic acids

Luis Mur, Barbara Hauck, Ana Winters, James Kevin Heald, Amanda Jane Lloyd, U. Chakraborty, B. N. Chakraborty

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

16 Dyfyniadau(SciVal)
99 Wedi eu Llwytho i Lawr (Pure)

Crynodeb

Blister blight (causal agent, Exobasidium vexans) is an economically devastating disease of tea (Camellia sinensis). To determine what metabolite changes occur with tea blister that could be linked to disease progression, metabolomic approaches were used on E. vexans infected tea from a Darjeeling (India) plantation. Samples were classified according to disease phenotypes, i.e. either healthy or at one of three stages of disease progression. Initial metabolite fingerprinting using Fourier transform infrared (FTIR) spectroscopy indicated that metabolite changes could be related to disease stage. Electrospray ionization mass spectrometry (ESI-MS) highlighted caffeine and flavonoid metabolism changes as disease progressed. High-performance liquid chromatography (HPLC) with online photodiode array detection and electrospray ionization-tandem mass spectrometry (HPLC-PDA-ESI/MSn) was used to characterize the caffeine, flavan-3-ol, flavone and flavonol profiles. There were increases in quercetin and kaempferol glucosides, kaempferol triglycosides and some catechin-class antioxidants, but also substantial reductions in apigenin and myricetin glycosides and, particularly, caffeine as disease progressed. The content of important defence hormones, salicylic acid and jasmonic acid, was also reduced in blister blight diseased samples. Thus, E. vexans infections perturb defence signalling and reduce many potentially antimicrobial compounds, such as caffeine, to aid disease progression.
Iaith wreiddiolSaesneg
Tudalennau (o-i)1471-1483
Nifer y tudalennau13
CyfnodolynPlant Pathology
Cyfrol64
Rhif cyhoeddi6
Dyddiad ar-lein cynnar11 Maw 2015
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 01 Rhag 2015

Ôl bys

Gweld gwybodaeth am bynciau ymchwil 'The development of tea blister caused by Exobasidium vexans in tea (Camellia sinensis) correlates with the reduced accumulation of some antimicrobial metabolites and the defence signals salicylic and jasmonic acids'. Gyda’i gilydd, maen nhw’n ffurfio ôl bys unigryw.

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