. Botany, an elementary text for schools. Botany. PAKASITES AND SAPKOPHYTES parasites are aided iu securing their food by soil fungi, which spread their delicate threads over the root-like branches of the parasite and act as intermediaries be- tween the food and the parasite. The roots of the coral-root (Fig. 119) are covered with this fungus, and the roots have practically lost the power of absorbing food direct. These fungous-covered roots are known as mycorrhizas (meaning "fungus root"). Mycorrhizas are not ])eculiar to parasites. They are found on many wholly independent plants a
. Botany, an elementary text for schools. Botany. PAKASITES AND SAPKOPHYTES parasites are aided iu securing their food by soil fungi, which spread their delicate threads over the root-like branches of the parasite and act as intermediaries be- tween the food and the parasite. The roots of the coral-root (Fig. 119) are covered with this fungus, and the roots have practically lost the power of absorbing food direct. These fungous-covered roots are known as mycorrhizas (meaning "fungus root"). Mycorrhizas are not ])eculiar to parasites. They are found on many wholly independent plants as, for example, the heaths, oaks, apples, and pines. It is probable that the fungous threads perform some of the offices of root-hairs to the host. On tlie other hand, tlie fungus obtains some nour- ishment from the host. The association seems to be mutual. 183. Sapropliytes l)reak down or decompose organic substances. Chief of these saprojiliytes are the microscoiuc organisms k n o w n as bacteria (Fig. 123). TliL'.sc i 1111 u m e r a 1) I e bodies arc immersed in water (tr in ;inimal and plant .juices, and absorb food over their entire surface. ]'>\ breaking down organic eombina- t ions, I III 1/ finiil iiri ill rill/. Largely tliroiigh their ag<'iicy, and that of many ti-iie hut niici-o- SCOpic I'uni^i, nil I Ililll/S JIIISS illln sail llllll l/IIS. Tliiis ai'c the h(»(lies of phmts and animals i-enioved and the con- tinuing roiiml ol' lil'r is maintained. 1S4. Sdiiii jiiirnsilis iir< i/ri i n - h nn il. Sm-h is the mistletoe. Thev aiudior themselves on the liosL and. l.'l. Saiirliylic linit,'iis. (tnc of i lie liinui (I'olyi)onis) Krowingon deaJ trunks und Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bailey, L. H. (Liberty Hyde), 1858-1954. New York Macmillan
Size: 1763px × 1417px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbai, bookcentury1900, bookdecade1900, booksubjectbotany
