. Fig. 183.—Puecinio i/ramiiiii (Aeeidiuiii lnrUriJis) on BerUris co»niiuni». Tlie lowest leaf and tWD othcis ure Hccn on the upper surface, and show red spots with liKht niarto»», i" which the pycnidia are embedded. The other «how the under surface with patches of aecidia. (v. Tubeuf del.) to their iieighljours to I'oiiii the peiidiuiu. diseased ])i)rtinns of leaves become considerably thickened. The cells of the single layer of palisade parenchyma are abnormally elongated, and the intercellular spaces of the spongy parenchyma, instead of being large, are small and filled wiili m
. Fig. 183.—Puecinio i/ramiiiii (Aeeidiuiii lnrUriJis) on BerUris co»niiuni». Tlie lowest leaf and tWD othcis ure Hccn on the upper surface, and show red spots with liKht niarto»», i" which the pycnidia are embedded. The other «how the under surface with patches of aecidia. (v. Tubeuf del.) to their iieighljours to I'oiiii the peiidiuiu. diseased ])i)rtinns of leaves become considerably thickened. The cells of the single layer of palisade parenchyma are abnormally elongated, and the intercellular spaces of the spongy parenchyma, instead of being large, are small and filled wiili mycelium. The aecidin- spores escape in July to germinate <ju (Iramineae. The germ- tube enters tiu; host by the stomata nidy, and develoj)s into an intercellular mycelium; this in about eight days jimduces uredospores from oishions or suri which form lines, ainl l»reak
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Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectparasit, bookyear1897
