Prekinitev dormance semen dveh vrst tulipanov (Tulipa scardica Bornm. in Tulipa kosovarica Kit Tan, Shuka & Krasniqi) s predhodnim hlajenjem, rastlinskimi rastnimi regulatorji in nekaterimi kemičnimi obravnavanji

Bekim GASHI, Mirsade OSMANI, Sali ALIU

Povzetek


Vrsti Tulipa scardica in T. kosovarica sta redki, endemični in ogroženi vrsti na Kosovu. Raziskava je bila opravljena za preučitev prekinitve dormance semen obeh vrst s predhodnim hlajenjem (stratifikacijo), z obravnavanji z različnimi koncentracijami kalijevega nitrata (KNO3), giberelinske kisline (GA3), kinetina, tiouree in žveplene kisline (H2SO4). Poskus je bil narejen s stratificiranimi (8 tednov) in nestrastificiranimi semeni in z različnimi koncentracijami omenjenih kemikalij ter rastlinskih rastnih regulatorjev. Rezultati so pokazali, da je bil končni odstotek kalitve nestratificiranih semen (FGP) pri obeh vrstah ničen, kalitev stratificiranih semen pa je bila po zgoraj omenjenih obravnavanjih povečana. Obe vrsti sta pokazali povečanje v poprečnem času kalitve (MGT), kar kaže na upočasnjeno kalitev ob povečanju koncentracij uporabljenih kemikalij in rastlinskih rastnih regulatorjev. Odvisno od obravnavanja, je bila kalitev med 80 % in 90 %, največja kalitev je bila ugotovljena pri semenih, ki so bila tretirana s KNO3 in GA3 v različnih kombinacijah, najmanjša kalitev je bila ugotovljena pri semenih, ki so bila tretirana s tioureo. Ohranjanje teh rastlin z gojenjem in razmnoževanjem v botaničnih vrtovih v komercialne namene kot okrasne rastline bi bil učinkovit prispevek k njihovi zaščiti v naravi.
Okrajšave: KNO3 – kalijev nitrat; GA3 – giberelinska kislina; H2SO4 – žveplena kislina; FGP – končni odstotek kalitve; GT – srednji čas kalitve.



Ključne besede


Tulipa scardica; Tulipa kosovarica; prekinitev dormance semen; kemikalije; hormoni

Celotno besedilo:

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DOI: http://dx.doi.org/10.14720/aas.2019.113.2.1

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