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03-06-2012 13:29

Marja Pennanen

Hello folks,I try to learn at least one new black

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Jakob Schneller Jakob Schneller

fruitbody ca. 0.30-0.4 mm, asci about 30 mikron, s

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Leptosphaeria on Lupinus
Marja Pennanen, 03-06-2012 13:29
Hello folks,

I try to learn at least one new black spot on a month. It seems, that I've been a bit lazy,
I collected some on Lupinus last month and looked them today.

They are about 0,2-0,3 mm wide.
Spores are a bit yellowish, about 45-58x4-5 and have 6 septas.
Asci are about 120-130x10-12.

The substrate and too big spores did not fit for L. maculans. Any fresh ideas?

Marja
  • message #18809
  • message #18809
Björn Wergen, 03-06-2012 14:08
Björn Wergen
Re : Leptosphaeria on Lupinus
Hi

L. maculans has 5 septated spores with no distinct enlarged cells. Your finding has 6 septations and the 3rd cell enlarged. 

It is not L. maculans, I have read something about a species growing on Lupinus, I will look for it and write again later.

regards,
björn
Alain GARDIENNET, 03-06-2012 14:11
Alain GARDIENNET
Re : Leptosphaeria on Lupinus
Hi Marja,
Have you observed mucilaginous cushion-shaped terminal appendages ?
Alain
Marja Pennanen, 03-06-2012 14:23
Re : Leptosphaeria on Lupinus
Hi Björn, Alain,

L. maculans was just the closes species I could find to this. I asked because I could not end up to a proper determination.

I can study one more to look for appendages. I did not notice such at the first time.

Marja
Björn Wergen, 03-06-2012 14:29
Björn Wergen
Re : Leptosphaeria on Lupinus
Your finding looks like Phaeosphaeria sowerbyi, but it does not fit macroscopically and it seems as if this species has vacuoles in each of the cells. I also do not think that this is a Phaeosphaeria. You should be right with Leptosphaeria.

regards,
björn
Marja Pennanen, 03-06-2012 16:04
Re : Leptosphaeria on Lupinus
Hi again,

the spores seems to have nothing extra besides septas and those vacuoles in each of the cells as Björn mentioned.

Marja
Mlcoch Patrik, 06-09-2018 18:03
Mlcoch Patrik
Re : Leptosphaeria on Lupinus
Hi Marja, 
this is probably Leptosphaeria wehmeyeri. I study this genus, so i would have interested in this your collection. Can you send me it, please? If yes, writte me on my e-mail: Pmlcoch99@gmail.com. Thank you, Patrik