कुछ लाइकेन और कवक में एक बीजाणु उत्पादक संरचना

Noun:

बीजाणूधानी, धानी गुच्छ,

sorus's Usage Examples:

A consideration of the Filicaceae as arranged above will show that the several sub-orders may in general terms be said to form a series between those in which the sorus consists of a single circle of bulky sporangia and those Polypodiaceae in which the numerous small sporangia appear to be grouped without order in the sorus.

The sorus has a somewhat elongated receptacle, on which the sporangia arise basipetally; the indusium may be cup-shaped, bivalve or wanting.

The sporangia arise simultaneously in the sorus, which is borne on the under surface of the ordinary pinna; in those species with large sporangia the latter form a single circle, in others sporangia may also arise from the central part of the receptacle.

The form of the sorus and the structure of the sporangium are of great systematic importance.

(All except d represent vertical sections of sporangiophore or sorus.) canal the spermatozoid, which in the Ferns has been shown to be attracted by reason of its positive irritability to malic acid, passes and fuses with the ovum.

Dictyota dichotoma, part of a sorus of antheridia.

P. Dictyota dichotoma, a sorus of oogonia.

Among the simplest cases are the sheet-like aggregates of sporogenous hyphae in Puccinia, Uromyces, 'c., or of basidia in Exobasidium, Corticium, 'c., or of asci in Exoascus, Ascocorticium, 'c. In the former, where the layer is small, it is often termed a sorus, but where, as in the latter, the sporogenous layer is extensive, and spread out more or less sheet-like on the supporting tissues, it is more frequently termed a hymenium.

Group of spore-cases (sorus) on back of leaf (X 4).

The sorus is frequently protected by an outgrowth from the surface or margin of the leaf called the indusium.

sorus's Meaning':

a spore-producing structure in certain lichens and fungi