Psilotum
| Psilotum | |
|---|---|
 Psilotum nudum sa sinangijama | |
| Sistematika | |
| Carstvo: | Plantae |
| Divizija: | Pteridophyta |
| Razred: | Polypodiopsida |
| Red: | Psilotales |
| Porodica: | Psilotaceae |
| Rod: | Psilotum Sw. |
| Baze podataka | |
Psilotum (lat. Psilotum), rod paprati u porodici Psilotaceae raširen po tropskoj Aziji, Južnoj Americi, Africi, Australiji, Srednjoj i jugu Sjeverne Amerike, a od Europe u Španjolskoj.[1]
Pripada mu uključujući jedan hibrid s Havaja (P. × intermedium)[2] tri vrste vazdazelenih trajnica.
Opis
Paprati psilotum imaju tkiva koja provode vodu i hranu, ali nema pravo lišće i korijenje. Fotosinteza se odvija u nadzemnim stabljikama, a apsorpcija vode i minerala događa se u vodoravnim podzemnim stabljikama nalik korijenu (Rizomma), koje primaju vodu i hranjive tvari od gljiva kroz mikoriznu povezanost. Dvije su faze u životnom ciklusu paprati. Velike nespolne biljke (Sporofiti) stvaraju spore koje se razvijaju u vrlo male bezbojne spolne biljke (Gametofite), koje su cjelokupnim izgledom slične rizomima. Jajašca i spermiji se proizvode u posebnim strukturama na njihovoj površini. Spajanje ovih gameta inicira drugu fazu sporofita.[3]
Vrste
- Psilotum complanatum Sw.
- Psilotum nudum (L.) P.Beauv.
- Psilotum ×intermedium W.H.Wagner
Sinonimi
- Bernhardia Willd. ex Bernh. = Psilotum Sw.
- Hoffmannia Willd. = Psilotum Sw.
- Tristeca P.Beauv. = Psilotum Sw.
Izvori
- ↑ Plants of the World online pristupljeno 16. lipnja 2019
- ↑ World Plants (Complete List pristupljeno 12. srpnjha 2022
- ↑ Britannica, pristupljeno 28. rujna 2023.
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