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Acrospermum graminum - Spore Sizes
Peter Thompson, 10-09-2012 20:38
Hello Everyone,

I have been trying to find information about the sizes of the filiform spores of Acrospermum graminum.

They are not stated in the Ellis & Ellis Microfungi on Land Plants book and so far, I have been unable to find the information anywhere else.

If you have the details of this, I would be very grateful to receive them.

Thanking you in advance,
Peter.
Spooren Marco, 10-09-2012 22:15
Spooren Marco
Re : Acrospermum graminum - Spore Sizes
Hello Peter,


Rehm (in Rabenhorst Kryptogamenflora ) gives for A. compresum,including A. graminum, the size of the spores as 100-400 x 1 MU.

Saccardo gives (Sylloge II page 807 ) 130-150 x 3-5 MU.

Rehm again states that given the development of the apothecia (!) the lenght of the spores varies.


Best regards,

Marco
Peter Thompson, 10-09-2012 23:03
Re : Acrospermum graminum - Spore Sizes
Hello Marco,

Thank you for these measurements.

The Saccardo width measurements seem too wide for filiform spores. I think that I shall use the Rehm measurements. 

Best wishes,
Peter.
Chris Yeates, 11-09-2012 01:53
Chris Yeates
Re : Acrospermum graminum - Spore Sizes
Hello Peter

this may help . . . .
Peter Thompson, 11-09-2012 20:47
Re : Acrospermum graminum - Spore Sizes
Hello Chris,

Thank you for this.

The Transactions of the BMS look very useful. I think that this is the first one which I have seen.

Do you, by any chance, have information about the spore sizes of the 5 powdery mildews which I listed in my other Forum request yesterday? This was the remaining information which I did not capture from a previous Forum request a few months ago.

Best wishes,
Peter.