. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. â¢â¢6 in Monotnypa. Tlic ruot-syslciii of a liee has not only to secure nourishnieut, Imt also tlu' rigidity and stal)ility of the tree.^ This latter can only be attained by a wide distribution of roots in the firm subsoil free from humus, where normal roots with root-hairs will be formed. Tlie nursing function of the niycorhiza seems thus tf» be less important than in the case of Fig. is.â nf
. Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae. Plant diseases; Parasitic plants; Fungi. â¢â¢6 in Monotnypa. Tlic ruot-syslciii of a liee has not only to secure nourishnieut, Imt also tlu' rigidity and stal)ility of the tree.^ This latter can only be attained by a wide distribution of roots in the firm subsoil free from humus, where normal roots with root-hairs will be formed. Tlie nursing function of the niycorhiza seems thus tf» be less important than in the case of Fig. is.â nf Pi-iwa Crmdra. A, Tj'pical niycorhiza. B, Root showing flustcis of mvforlii/ ( i v â 11 ,,s portions clad with fine root-hairs. C, Rootlet exhibiting buttmi Ii Hi i externally devoid of a fungoid mantle, but internally conipl't : I liy mycelium. 2), Section thi-ough a thickened branch of a myioi hi â i > li-t^ i-: a, fungoid mantle; l>, fungoid tissue between the cells of the root, rendering them unrecognizable except by their large nuclei; the inner parts contain no fungi, (v. Tubeuf del.) ]\Iy newest investigations on this subject ^ show that, amongst the gymnospermous forest-trees, the Abietineae alone have roots externally clothed with a fungus ; the remaining groups have all endophytic niycorhiza. The Abietineae have frequently only ji fine mantle of fungus on their rootlets, and do not produce the tufts of short, branched roots so characteristic of mycorliiza in general. Frank does not seem to be altogether correct in his view that the Abietineae are almost or quite incapable of multi- plication by slips, because they would then require to exist for a time without niycorhiza. Probably there is some other reason for this, because the Salicaceae ( Poplars), which have typical coral-branclu'd niycorhiza, are almost exclusively multiplied l)y slips. ^ Hoveler, ("ilb. die Verwerthiing is. Zeilschrift, Please note that these images are extr
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
