Pertaining to, or containing, gonidia or gonimia, as that part of a lichen which contains the green or chlorophyll-bearing cells.
They are also found enveloping the gonidia of lichens, making up a large part of their structure.
Translation of Schwendener's "Nature of the Gonidia of Lichens," in same journal, vol.
But who has ever seen the gonidiaof lichens the worse for having the 'hypha' growing amongst them?
That the membrane of the gonidia was chemically different from the membrane of the other tissues, inasmuch as the first had a reaction corresponding to that of algæ, whilst the second had that of fungi; 3rd.
Mr. Thwaites was the first to point out[R] the relation of the gonidia in the different sections of lichens to different types of supposed algæ.
That the different forms and varieties of gonidia corresponded with parallel types of algæ; 4th.
These gonidia are always in the plumpest state, and with the freshest, healthiest colour possible.
This he thinks is the only way in which it can be accounted for that the gonidia of diverse lichens should be almost identical.
Defn: Pertaining to, or containing, gonidia or gonimia, as that part of a lichen which contains the green or chlorophyll-bearing cells.
The perithecium is very constant in form and since thegonidia take no part in the formation of this organ or that of the apothecium it has the general structure characteristic of that division of fungi.
When the spores germinate the germ-tubes surround the algal cells, which now increase in size and become the normal gonidia of the thallus.
The exact relation of gonidia and hyphae has been investigated especially by Bornet and also by Hedlund, and very considerable differences have been shown to exist in different genera.
In the first process, portions of thallus containing gonidia may be accidentally separated and so may start new plants.
They are distinguished by possessing as gonidia algae foreign to the ordinary part of the thallus.
The majority of the lichens, however, possess a stratified thallus in which the gonidia are found as a definite layer or layers embedded in a pseudo-parenchymatous mass of fungal hyphae, i.
Funfstuck gives ten free living algae which have been identified as the gonidia of lichens.
In the moist state of the thallus these colours are much less apparent, as the textures then become more or less translucent, and the thallus usually prevents the greenish colour of the gonidia (e.
The genus Dictyonema has gonidiabelonging to the blue-green alga, Scytonema.
In 1869 Schwendener put forward the really illuminating view--exactly opposite to that of Baranetzky--that the gonidia in all cases were algae which had been attacked by parasitic fungi.
It has been made clear above that the gonidia are nothing more than algal cells, which have been ensnared by fungal hyphae and made to develop in captivity (fig.
Unicellular, chlorophyl-free plants, reproducing by transverse division (some forms by gonidia also).
Reproduction also bygonidia formed from an entire cell.
The gonidia of lichens may also reproduce indefinitely in this fashion, and only some of the products of multiplication may go on to the production of lichens similar to that from which the gonidia had been derived.
Some Bacteria may therefore develop into some fungi, just as certainly as some Torulæ may develop into other fungi, or, just as surely as some multiplying gonidia may develop into lichens.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "gonidia" in a variety of sentences. We hope that you will now be able to make sentences using this word.
