skin whitening products for blackspot?

13 years ago

The following was recently published:

Title: Melanization of appressoria is critical for the pathogenicity of Diplocarpon rosae.

Authors: Gachomo, Emma W.; Seufferheld, Manfredo J.; Kotchoni, Simeon O.

Authors affiliation: Department of Biology and Microbiology, South Dakota State University, Brookings, SD, USA.

Published in: Molecular Biology Reports (2010), 37(7), pages 3583-3591.

Abstract: "Previous studies have shown the role of melanized appressoria in the pathogenicity of various fungi. Diplocarpon rosae is a worldwide outdoor fungal pathogen of rose plants causing black spot disease of rose leaves. To fully understand how this fungus colonizes its host, which is critical for the development of an efficient and sustainable disease management program, we studied the fungal (especially. the appressoria) structures of D. rosae in detail at an early stage of infection. Using both microscopic and biochemical analyses, we observed strong melanized appressoria formation localized at the point of D. rosae penetration, which forms the pathogen-plant interface. Treatment of infected plants with melanin biosynthesis inhibitors (MBIs) prevented melanization of D. rosae appressoria and positively correlated with significant reductions in black spot disease symptoms, suggesting that melanization of appressoria might be a critical factor for the pathogenicity of D. rosae. Our findings were confirmed and validated by the lack of melanized appressorial ring formation on an artificial surface and on a D. rosae-non host plant system, Arabidopsis thaliana. Our findings suggest that localized melanization of appressoria is a crucial factor for the pathogenicity of D. rosae and treatment of the fungus with MBIs seems to be a promising disease management alternative for black spot disease of roses."

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Comments (12)

henry_kuska
Original Author
13 years ago
Perhaps one of the commercial products sold for rice blast control could be used. See complete paper linked to below.

Here is a link that might be useful: link for above
karl_bapst_rosenut
13 years ago
Henry
These scientific articles might have more meaning and generate more responses if you'd interpret them for us instead of just providing a link
I have to sit here with a dictionary while reading them.
Due to the nature of most of these links, I seldom open or read your posts. Might do it more often if I could understand them!
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jim1961 / Central Pennsylvania / Zone 6
13 years ago
I also do not understand some of your articles either Henry.
So, I do not comment.
jaxondel
13 years ago
Karl, Just what aspects of molecular biology are you having difficulty with?

Personally, as soon as I read reference to " . . . the role of melanized appressoria in the pathogenicity of various fungi" I was hooked. Not to mention the discussions of Arabidopsis thaliana, biosynthesis inhibitors (MBIs), and strong melanized appressoria formation localized at the point of D. rosae penetration, which forms the pathogen-plant interface.

If the abstract is that seductive, you really owe it to yourself to pour over the entire published study. The study's authors have, after all, found that melanization of appressoria is critical for the pathogenicity of Diplocarpon rosae. You do care about that, don't you Karl?
karl_bapst_rosenut
13 years ago
jaxondel
Huh?
I hope you were joking. If so,ha-ha-ha, if not, I lost you after the ... in the first sentence!
professorroush
13 years ago
Nominated for one of the best threads running. Henry,I usually can understand the articles, but I've got a scientific background and know how to ignore most of the Latin. Keep posting, cause they're interesting.

Here is a link that might be useful: Garden Musings blog
olga_6b
13 years ago
Henri, keep posting, they are interesting, but you need to have a scientific background to understand some of your posts. If you want more people to understand and appreciate your posts, probably give a brief interpritation or why do you think this can be significant or interesting.
I personally enjoy your posts with scientific abstracts much more than the links to articles on rose growing from local newspapers, which make me really sad :)
Olga
nastarana
13 years ago
Henry, or Jax, how about you try out some of those melanin biosynthesis inhibitors in your gardens and get back to us? I shall be checking GW daily to read about the results of your experiments.
henry_kuska
Original Author
13 years ago
nastarana, up to this summer I have grown about 1000 roses in a no spray garden. I am a believer that roses reach an equilibrium with friendlies/pests in about 5 years. What I am saying is that I could not do this type of test because blackspot is not a problem in my garden.

Also, this summer I reduced the number of roses to less than 500. Next summer, who knows. We are preparing a final retirement move, probably to Florida.
henry_kuska
Original Author
13 years ago
Looks like I have had a "senior moment" as I reported this research on this forum back in April.

Here is a link that might be useful: link for above
hoovb zone 9 sunset 23
13 years ago
Most of these scientific papers point to treatments that probably work great as long as you grow your roses in a sterile test tube.

Anyone here grow roses in sterile test tubes?
jim1961 / Central Pennsylvania / Zone 6
12 years ago
Yes I always ask our ROSES dermatologist if products may be
too harsh for its sensitive leaf pores...

skin whitening products for blackspot?

Comments (12)

henry_kuska
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karl_bapst_rosenut

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skin whitening products for blackspot?

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