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Antioxidant defense against rust infection in the leaf tissue of Malus crabapple

  • Yudan Duan
  • Suxiao Hao
  • Rui Luo
  • Yanfen Lu
  • Ge Li
  • Jie Zhang
  • Ji Tian
  • Yuncong YaoEmail author
Original Article
  • 70 Downloads

Abstract

Plant tissues and cells can sense and transmit stress signals, change their morphological structures, alter protein and gene expression, and activate metabolic pathways to adapt to stressful environments. However, the internal and external resistance mechanisms related to antioxidation in local tissues or cells suffering from biotic stress remain unclear. We studied the response of Malus crabapple leaves to cedar-apple rust infection, and the results revealed that significant color changes and flavonoid compound accumulation (especially anthocyanins) occurred in the rust-infected tissue (RIT), whereas no significant color changes and only flavonol and flavanone accumulation occurred in the non-infected tissue (NIT). There was an up-regulation of expression of the key structural genes and MYBs related to anthocyanins biosynthesis in the RIT, while its expression related to flavonol and flavanone biosynthesis was up-regulated in the NIT. Moreover, the accumulation of glucose, sucrose, and sorbitol among the tested carbohydrates was successively induced at higher levels in the RIT and NIT. Importantly, rust infection increased the contents of jasmonate (JA), abscisic acid (ABA), and ethylene (ETH), and significantly up-regulated related key genes in the RIT and NIT during rust spot expansion. Spearman’s correlation and redundancy analyses indicated that ABA and ETH were potentially involved in oxidative defense responses to rust spot expansion by initiating the transcription of key genes, increasing the sugar supply, and adjusting the osmotic balance.

Keywords

Malus Rust Flavonoid biosynthesis MYBs 

Abbreviations

ABA

Abscisic acid

ETH

Ethylene

JA

Jasmonate

LOX

Lipoxygenase

NCED

9-cis-Epoxycarotenoid dioxygenase

ACS

Aminocyclopropane-1-carboxylate synthase

GLU

Glucose

SUR

Sucrose

SOR

Sorbitol

FRU

Fructose

API

Apigenin

FLA

Flavonol

CAT

Catechin

EC

Epicatechin

PA

Proanthocyanidin

ANTH

Anthocyanin

PAL

Phenylalanine ammonia-lyase

CHS

Chalcone synthase

CHI

Chalcone isomerase

F3H

Flavanone 3-hydroxylase

F3′H

Flavonoid 3′-hydroxylase

FLS

Flavonol synthase

DFR

Dihydroflavonol 4-reductase

LAR

Leucoanthocyanidin reductase

ANS

Anthocyanidin synthase

UFGT

UDP-glucose flavonoid-3-O-glucosyl transferase

ANR

Anthocyanin reductase

Notes

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Grant No. 31200213), the Beijing Collaborative Innovation Center for Eco-environmental Improvement with Forestry and Fruit Trees (No. CEFF-PXM2016-014207-000038), the National Key Project of Research and Development Plan (Grant No. 2016YFD0201116), the Beijing Key Project of Science and Technology Plan (Grant No. D161100000716003), and the Agricultural Science and Technology Project of Beijing Municipal Commission of Rural Affairs (Grant No. 20150121). Meanwhile, we thank the Beijing Nursery Engineering Research Center for Fruit Crops, the Key Laboratory of Pomology, and the Key Laboratory of Agricultural Applications at the Beijing University of Agriculture.

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Copyright information

© Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków 2019

Authors and Affiliations

  • Yudan Duan
    • 1
    • 2
    • 4
  • Suxiao Hao
    • 5
  • Rui Luo
    • 3
  • Yanfen Lu
    • 1
    • 2
    • 4
  • Ge Li
    • 1
    • 2
    • 4
  • Jie Zhang
    • 1
    • 2
    • 4
  • Ji Tian
    • 1
    • 2
    • 4
  • Yuncong Yao
    • 1
    • 2
    • 4
    Email author
  1. 1.Plant Science and Technology CollegeBeijing University of AgricultureBeijingChina
  2. 2.Beijing Key Laboratory for Agricultural Applications and New TechniquesBeijingChina
  3. 3.College of Food Science and EngineeringBeijing University of AgricultureBeijingChina
  4. 4.Beijing Nursery Engineering Research Center for Fruit CropsBeijingChina
  5. 5.College of Horticulture and Landscape ArchitectureSouthwest UniversityChongqingChina

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