Development of plant cuticles: occurrence and role of non-ester bonds in cutin of Clivia miniata Reg. leaves

Planta ◽  
1982 ◽  
Vol 156 (4) ◽  
pp. 380-384 ◽  
Author(s):  
H. W. Schmidt ◽  
J. Sch�nherr
Keyword(s):  
Plant Cuticles ◽  
Clivia Miniata

Development of plant cuticles: fine structure and cutin composition of Clivia miniata Reg. leaves

Planta ◽  
1988 ◽  
Vol 174 (1) ◽  
pp. 127-138 ◽  
Author(s):  
Markus Riederer ◽  
J�rg Sch�nherr
Keyword(s):  
Fine Structure ◽  
Plant Cuticles ◽  
Clivia Miniata

scholarly journals Molecular taphonomy of animal and plant cuticles: selective preservation and diagenesis

1999 ◽  
Vol 354 (1379) ◽  
pp. 7-17 ◽  
Author(s):  
Derek E. G. Briggs
Keyword(s):  
Decay Resistance ◽  
Major Influence ◽  
Partial Explanation ◽  
Diagenetic Alteration ◽  
Plant Cuticles ◽  
Selective Preservation ◽  
Almost All ◽  
Long Term Preservation

The nature of organic material and the environment in which it is deposited exert a major influence on the extent to which biomacromolecules are preserved in the fossil record. The role of these factors is explored with a particular focus on the cuticle of arthropods and leaves. Preservation of the original chemistry of arthropod cuticles is favoured by their thickness and degree of sclerotization, and the presence of biominerals. Decay and burial in terrestrial as opposed to marine, and anoxic rather than oxygenated conditions, likewise appear to enhance preservation. The most important factor in the long–term preservation of the chemistry of both animal and plant cuticles, however, is diagenetic alteration to an aliphatic composition. This occurs even in amber, which encapsulates the fossil, eliminating almost all external factors. Some plants contain an original decay–resistant macromolecular aliphatic component but this is not the case in arthropods. It appears that the aliphatic components of many plant as well as animal fossils may be the result of diagenetic polymerization. Selective preservation as a result of decay resistance may explain the initial survival of organic materials in sediments, but in many cases longer–term preservation relies on chemical changes. Selective preservation is only a partial explanation for the origin of kerogen.

Role of the Extractable Lipids and Polymeric Lipids in Sorption of Organic Contaminants onto Plant Cuticles

2008 ◽  
Vol 42 (5) ◽  
pp. 1517-1523 ◽  
Author(s):  
Baoliang Chen ◽  
Yungui Li ◽  
Yiting Guo ◽  
Lizhong Zhu ◽  
Jerald L. Schnoor
Keyword(s):  
Organic Contaminants ◽  
Plant Cuticles

scholarly journals Unravelling the role of alcohol copper radical oxidases in fungal plant pathogens

2021 ◽  
Author(s):  
Bastien Bissaro ◽  
Sayo Kodama ◽  
Hayat Hage ◽  
David Ribeaucourt ◽  
Mireille Haon ◽  
...  
Keyword(s):  
Plant Pathogens ◽  
Crop Protection ◽  
Redox Partner ◽  
Fungal Plant Pathogens ◽  
Plant Cuticles ◽  
Penetration Ability ◽  
Molecular Signals

Abstract Copper radical oxidases (CRO) form a class of enzymes with a longstanding history encompassing diverse substrate specificities. While the biological function of most CROs remains unknown, we observed that CROs active on aliphatic alcohols are found only in fungal plant pathogens. Here, we unveil the role of these CROs and the identity of their natural redox partner, a haem-iron peroxidase. Combining multiscale approaches, we report that Colletotrichum and Magnaporthe appressoria (specialized cells that puncture the plant cuticles) co-secrete this pair of metalloenzymes early during penetration. We show in vivo that mutant appressoria lacking either or both enzymes have impaired penetration ability and pathogenicity. We reveal in vitro a finely-tuned enzyme interplay is responsible for the oxidation of plant cuticular long-chain alcohols into aldehyde products, suggested to act as key molecular signals in the fungal infection machinery. Our results open new avenues to design oxidase-specific inhibitors as anti-penetrants for crop protection.

scholarly journals Dynamics of moisture diffusion and adsorption in plant cuticles including the role of cellulose

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
E. C. Tredenick ◽  
G. D. Farquhar
Keyword(s):  
Water Sorption ◽  
Food Production ◽  
Water Movement ◽  
Moisture Diffusion ◽  
Plant Cuticle ◽  
Plant Cuticles ◽  
Global Population ◽  
Model Water ◽  
Over Time

AbstractFood production must increase significantly to sustain a growing global population. Reducing plant water loss may help achieve this goal and is especially relevant in a time of climate change. The plant cuticle defends leaves against drought, and so understanding water movement through the cuticle could help future proof our crops and better understand native ecology. Here, via mathematical modelling, we identify mechanistic properties of water movement in cuticles. We model water sorption in astomatous isolated cuticles, utilising three separate pathways of cellulose, aqueous pores and lipophilic. The model compares well to data both over time and humidity gradients. Sensitivity analysis shows that the grouping of parameters influencing plant species variations has the largest effect on sorption, those influencing cellulose are very influential, and aqueous pores less so but still relevant. Cellulose plays a significant role in diffusion and adsorption in the cuticle and the cuticle surfaces.

Role of dactinomycin in the improved survival of children with Wilms' tumor

JAMA ◽  
1966 ◽  
Vol 195 (12) ◽  
pp. 1005-1009 ◽  
Author(s):  
D. J. Fernbach
Keyword(s):  
Wilms Tumor
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