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Definitions and meanings of "Sporogonia"

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Here you will find one or more explanations in English for the word sporogonia. Define sporogonia, sporogonia synonyms, sporogonia pronunciation, sporogonia translation, English dictionary definition of sporogonia.

Synonyms and Antonyms for Sporogonia

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The word "sporogonia" in example sentences

Parallel with the evolution of the gametophyte in form and structure, a progression can be traced in the sporogonium, although the simplest sporogonia available for study may owe much of their simplicity to reduction. ❋ Various (N/A)

_ The plant bears three mature sporogonia which show the elongation of the seta. ❋ Various (N/A)

Even in those rare cases in which the sexual generation can be developed without the intervention of spore production from the tissues of the sporogonium, a protonema is formed from cut pieces of the seta or in some cases from intact sporogonia still attached to the plant. ❋ Various (N/A)

Jungermanniaceae, in which the branch continues its growth after the formation of archegonia so that they (and later the sporogonia) stand on the dorsal surface of the thallus or leafy plant. ❋ Various (N/A)

In fig. 4 young sporogonia of a number of liverworts are shown in longitudinal section, and the archesporial cells from which the spores and elaters will arise are shaded. ❋ Various (N/A)

The protonema is usually filamentous, and in some of the simplest forms is long-lived, while the small plants borne on it serve mainly to protect the sexual organs and sporogonia. ❋ Various (N/A)

_Calypogeia_ and _Saccogyna_ are British forms, which have their sporogonia protected in this way. ❋ Various (N/A)

(_Riccia_) possess the simplest sporogonia known, consisting of a wall of one layer of cells enclosing the spores. ❋ Various (N/A)

In most forms the capsule is raised above the general surface at the time of opening, usually by the rapid growth of the seta, but in the Marchantiaceae by the sporogonia being raised on a special archegoniophore. ❋ Various (N/A)

Other adaptations concern the protection of the sexual organs and sporogonia, and the retention of water in the neighbourhood of the archegonia to enable the spermatozoid to reach the ovum. ❋ Various (N/A)

The series of increasingly complex sporogonia among Bryophytes appears to be most naturally explained on an hypothesis of progressive sterilization of sporogenous tissue, such as has been advanced by Bower. ❋ Various (N/A)

An examination of the younger parts of the same plants will probably show small buds (Fig.  54, _H_), which contain the female reproductive organs, from which the sporogonia arise. ❋ Douglas Houghton Campbell (N/A)

The second order, the horned liverworts (_Anthoceroteæ_), are sometimes to be met with in late summer and autumn, forms growing mostly on damp ground, and at once recognizable by their long-pointed sporogonia, which open when ripe by two valves, like a bean pod ❋ Douglas Houghton Campbell (N/A)

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