Question

Soral evolution in pteridophytes biology discussion

Answer 1

Answer:

Pteridophytes constitute a significant and important group in the plant kingdom. As the first true land plants, they offer a very favourable material for the study of various adaptations that have made the colonization of land possible for the plants.

Pteridophytes have a long geological history on our planet. They are known from as far back as 380 million years. Fossils of pteridophytes have been obtained from rock strata belonging to Silurian and Devonian periods of the Palaeozoic era

Origin of Pteridophytes:

Problems concerning the origin and evolution of any plant group have not been solved to date, to the satisfaction of all. Problems of origin and evolution by their very nature give ample scope for speculation and imaginative interpretation. Hence, it should surprise none, if the views concerning the origin and evolution of a group are as varied as the morphologists themselves.

The problem of the origin and evolution of vascular cryptogams is no exception to this general rule. There have been various interpretations and perhaps many more are yet to come. A detailed analysis of all these theories is beyond the scope of this book. Basic outlines of a few of the more important theories concerning the origin of pteridophytes is given here.

There are mainly two schools of thought. According to one, pteridophytic ancestry is to be sought among bryophytes. According to the other, pteridophytes arose from some algal stock and evolved parallel with bryophytes. While the latter experimented with the gametophyte on a terrestrial habitat with little success, the former experimented with the sporophyte and achieved phenomenal success paving way for other terrestrial plants.

Answer 2

Soral Evolution in Pteridophytes

Explanation:

• A sorus (pl. sori) is a cluster of sporangia (structures producing and containing spores and structures producing ) in ferns and fungi
• The sporangia at that point burst and discharge the spores
• The shape, arrangement, and area of the sori are frequently significant pieces of information in the distinguishing proof of plant taxa. Sori might be round or linear
• A sorus might be protected during improvement by a scale or fold of tissue called an indusium