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Spore

Izvor: Wikipedija

Mikroskopski pogled na spore preslice (Equisetum)

Spora je posebna tvorba, koju tvore pojedini organizmi, kako bi preživjeli nepovoljne životne uvjete, koje uzrokuju različiti abiotski čimbenici, kao što su: pomanjkanje hrane i/ili vode, previsoka ili preniska temperatura i sl. Spore imaju bakterije, alge, neke gljive, praživotinje i neke necvijetajuće biljke poput paprati.

Spore se javljaju prvenstveno kod jednostaničnih organizama. Mogu biti spolne ili nespolne. U nespolnim sporama, genetski materijal jednak je kao i od roditelja. Okružene su debelom ovojnicom, što im omogućuje da prežive dugo vremena, čak i desetljeća. Kad nastupe povoljni uvjeti iz spora se razvije organizam. Bakterijske su spore vrlo otporne. Npr. spore tetanusa i antraksa mogu preživjeti u tlu jako mnogo godina. Nađene su spore tih bakterija iz 19. stoljeća, koje su preživjele i kuhanje u trajanju od pet minuta. To je ubilo bakterije, ali ne i spore. Proklijale su kada su se poboljšali uvjeti. [1]

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Izvori

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  1. Kornberg, Arthur 1989. For the love of enzymes: the odyssey of a biochemist. Harvard. Preuzeto 24. travnja 2011.
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Spore
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