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Suberin deposition in potato periderm: a novel resistance mechanism against tuber greening

Citation

Tanios, S and Thangavel, T and Eyles, A and Tegg, RS and Nichols, DS and Corkrey, R and Wilson, CR, Suberin deposition in potato periderm: a novel resistance mechanism against tuber greening, New Phytologist, 225, (3) pp. 1273-1284. ISSN 0028-646X (2020) [Refereed Article]


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DOI: doi:10.1111/nph.16334

Abstract

  • Light‐induced tuber greening is one of the most important quality defects of potato. Although varietal and maturity factors are known to affect greening resistance, physiological mechanisms of resistance are poorly understood. We proposed that physiological and biochemical factors within the tuber periderm provide resistance and hypothesised that resistance is primarily related to suberin content.
  • We investigated differences in the tuber periderm between genotypes and tuber maturities that varied in greening propensity. We examined suberin and light‐induced pigment accumulation, and phellem cell development and studied greening propensity in mutant and chemically treated tubers with enhanced suberisation.
  • Resistance to greening was strongly linked to increased suberin in the periderm, which varied with variety and tuber maturity. Furthermore, greening was reduced in mutant and chemically treated tubers with enhanced suberisation. Increases in phellem cell layers and light‐induced carotenoids and anthocyanins were identified as secondary resistance factors.
  • Our work represents the first physiological mechanism of varietal and tuber maturity resistance to greening, expanding the known functionality of suberin and providing for the first time a biomarker that will aid producers and breeders in selection and improvement of potato varieties for greening resistance.

Item Details

Item Type:Refereed Article
Keywords:anthocyanins, carotenoids, chlorophyll, phellem, potato, suberin, tuber greening resistance
Research Division:Agricultural and Veterinary Sciences
Research Group:Horticultural Production
Research Field:Post Harvest Horticultural Technologies (incl. Transportation and Storage)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural Crops
Objective Field:Vegetables
UTAS Author:Tanios, S (Miss Sabine Tanios)
UTAS Author:Thangavel, T (Dr Tamil Thangavel)
UTAS Author:Eyles, A (Dr Alieta Eyles)
UTAS Author:Tegg, RS (Dr Robert Tegg)
UTAS Author:Nichols, DS (Dr David Nichols)
UTAS Author:Corkrey, R (Dr Ross Corkrey)
UTAS Author:Wilson, CR (Professor Calum Wilson)
ID Code:136818
Year Published:2020
Deposited By:TIA - Research Institute
Deposited On:2020-01-20
Last Modified:2020-04-01
Downloads:0

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