Advertisement

Topics

Lignin biosynthesis as a key mechanism to repress Polystigma amygdalinum, the causal agent of the red leaf blotch disease in almond.

08:00 EDT 23rd March 2019 | BioPortfolio

Summary of "Lignin biosynthesis as a key mechanism to repress Polystigma amygdalinum, the causal agent of the red leaf blotch disease in almond."

The red leaf blotch (RLB) of almond, caused by the fungus Polystigma amygdalinum, is considered as one of the most important leaf diseases of this fruit tree. Differential cultivar susceptibility to the RLB has been described based on field observations, while its molecular and biochemical bases remain unknown to date. We aimed to explore the plant defence mechanisms related to the cultivar susceptibility by identifying some relevant physical and chemical strategies for the pathogen control. Thus, we studied the regulation of seven defence-related genes as well as the lignin deposition in two almond cultivars with highly differential response to
RLB:
the highly tolerant 'Mardía' and the susceptible 'Tarraco' cultivars. 'Mardía' displayed an up-regulation of the CAD and DFN1 genes at early stages of RLB symptom expression, with further lignin deposition in the fungal-colonized area that was visualized by microscopy. Thus, 'Mardía' uses both physical and chemical responses to effectively repress the pathogen. In contrast, 'Tarraco' triggered the up-regulation of HQT and LDOX genes, related to chlorogenic acid and anthocyanin biosynthesis pathways, respectively, while lignin deposition was not clearly noticed. This strategy recorded in 'Tarraco' at later stages of RLB symptoms failed to control the fungal infection and colonization. Our results suggested a major role of the phenylpropanoids pathway in the defence response against RLB, by showing that an early production of lignin might be a major mechanism to control the spread of P. amygdalinum within the host leaf tissues.

Affiliation

Journal Details

This article was published in the following journal.

Name: Journal of plant physiology
ISSN: 1618-1328
Pages: 96-104

Links

DeepDyve research library

PubMed Articles [10213 Associated PubMed Articles listed on BioPortfolio]

Population-level approaches reveal novel aspects of lignin biosynthesis, content, composition and structure.

Population-level studies enabled by high-throughput phenotyping have revealed significant variation in lignin characteristics including content, S:G:H ratio, inter-unit linkage distributions, and mole...

Simultaneous regulation of F5H in COMT-RNAi transgenic switchgrass alters effects of COMT suppression on syringyl lignin biosynthesis.

Ferulate 5-hydroxylase (F5H) catalyzes the hydroxylation of coniferyl alcohol and coniferaldehyde for the biosynthesis of syringyl (S) lignin in angiosperms. However, the coordinated effects of F5H wi...

Lignin engineering to improve saccharification and digestibility in grasses.

The digestibility of plant biomass has a major influence on its value as a forage for livestock and as a feedstock for industrial biotechnology. For both processes, the concentration, structure and co...

Rice OsPEX1, an extensin-like protein, affects lignin biosynthesis and plant growth.

Rice leucine-rich repeat extensin-like protein OsPEX1 mediates the intersection of lignin deposition and plant growth. Lignin, a major structural component of secondary cell wall, is essential for nor...

Lignin biosynthesis and its integration into metabolism.

Lignin is a principal structural component of cell walls in higher terrestrial plants. It reinforces the cell walls, facilitates water transport, and acts as a physical barrier to pathogens. Lignin is...

Clinical Trials [3472 Associated Clinical Trials listed on BioPortfolio]

A Pilot Study of Filtrum-STI in Children With Viral Gastroenteritis

This is a phase II double blind multicenter randomized placebo-controled clinical study aimed to find out whether treatment with Filtrum-STI (orally administered 0,4g tablets) is safe and ...

A Study To Assess The Effect Of PF-03526299 On Lung Function Following An Allergen Challenge In Asthmatic Subjects

PF-03526299, a novel anti-inflammatory agent should attenuate the effect of a bronchial allergen challenge on lung function and hence provide proof of mechanism for this agent.

Weekly Paclitaxel Plus Gemcitabine as Second-line in Small Cell Lung Cancer

As a single agent, paclitaxel has a response rate of 33% and 25-29% in SCLC patients with sensitive relapse and with resistant relapse, respectively. As a single agent, gemcitabine also ha...

The Effects of CPAP Withdrawal on Cerebral Vascular Reactivity and Brain Oxygenation in OSA

Obstructive sleep apnoea (OSA) is a highly prevalent sleep-related breathing disorder associated with adverse cardiovascular outcome. Underlying mechanisms are subject of debate. A causal ...

Consumer Motivation for Disease Prevention

The purpose of this study is to examine (1) how the causal structure of a disease influences people's disease prevention decisions; and (2) how the causal structure of a disease interacts ...

Medical and Biotech [MESH] Definitions

A copper-containing oxidoreductase enzyme that catalyzes the oxidation of 4-benzenediol to 4-benzosemiquinone. It also has activity towards a variety of O-quinols and P-quinols. It primarily found in FUNGI and is involved in LIGNIN degradation, pigment biosynthesis and detoxification of lignin-derived products.

The most abundant natural aromatic organic polymer found in all vascular plants. Lignin together with cellulose and hemicellulose are the major cell wall components of the fibers of all wood and grass species. Lignin is composed of coniferyl, p-coumaryl, and sinapyl alcohols in varying ratios in different plant species. (From Merck Index, 11th ed)

A protozoan parasite that occurs primarily in subtropical and temperate areas. It is the causal agent of quartan malaria. As the parasite grows it exhibits little ameboid activity.

A species of protozoa that is the causal agent of falciparum malaria (MALARIA, FALCIPARUM). It is most prevalent in the tropics and subtropics.

A species of ENTEROVIRUS which is the causal agent of POLIOMYELITIS in humans. Three serotypes (strains) exist. Transmission is by the fecal-oral route, pharyngeal secretions, or mechanical vector (flies). Vaccines with both inactivated and live attenuated virus have proven effective in immunizing against the infection.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Relevant Topic

Infectious-diseases
Antiretroviral Therapy Clostridium Difficile Ebola HIV & AIDS Infectious Diseases Influenza Malaria Measles Sepsis Swine Flu Tropical Medicine Tuberculosis Infectious diseases are caused by pathogenic...


Searches Linking to this Article