Bonjour,
Absent pour la journée. Réponses demain matin.
En attendant, voici l'extrait de l'article précité, parlant des spores de P. ostreatus lorsqu'il pousse sur Picea ( var. columbinus)
F r u i t b o d i e s o f one s i n g l e s t r a i n o f P. o s t r e a t u s ( s t r a i n 2 y ) w e r e
grown on d i f f e r e n t s u b s t r a t e s a n d t h e d i s t r i b u t i o n o f s p o r e d i m e n -
s i o n s was d e t e r m i n e d . The l e n g t h o f s p o r e s showed g r e a t e r v a r i a t i o n
t h a n t h e d i a m e t e r o f s p o r e s a n d was t h e r e f o r e u s e d f o r p r e s e n t a t i o n
o f r e s u l t s ( F i g . 3 ) . 100 s p o r e s e a c h f o r e v e r y e x p e r i m e n t were measu-
r e d . G r e a t e s t v a r i a t i o n i n s p o r e l e n g t h was f o u n d i n t h e f r u i t b o d i e s
f r o m P. o s t r e a t u s on S a l i x , t h e maximum o f f r e q u e n c y b e i n g a r o u n d 9,5
m i c r o n s ; t h e s h o u l d e r a r o u n d 11 m i c r o n s c o u l d r e p r e s e n t a f u r t h e r ,
h i d d e n maximum. UJith e x c e p t i o n o f t h e f r u i t b o d i e s on s t u m p s o f P i -
c e a , i n a l l o t h e r e x p e r i m e n t s v a r i a t i o n o f s p o r e d i a m e t e r s was n a r r o -
w e r . The a v e r a g e l e n g t h o f s p o r e s f r o m w h e a t s t r a w was s m a l l e r , t h e
peak o f f r e q u e n c y b e e i n g a r o u n d 8,5 m i c r o n s . C l e a r l y h i g h e r were t h e
v a l u e s f o r s p o r e s f r o m f r u i t b o d i e s on s t u m p s o f P i c e a w h e r e t h e ma-
ximum f r e q u e n c y was a t 11,5 m i c r o n s . D i f f e r e n t s u b s t r a t e s t h e r e f o r e
h a v e a s t r o n g i n f l u e n c e on t h e a v e r a g e d i m e n s i o n o f s p o r e s ( 8 . 5 -
1 0 . 9 5 m i c r o n s ) a n d t h e maxima o f f r e q u e n c y may be i n e x t r e m e c a s e s a s
f a r a p a r t a s 3 m i c r o n s .
