magistrsko delo
Anja Fekonja (Author), Jerneja Jakopič (Mentor)

Abstract

Na pridelavo kakovostnih in dobro ukoreninjenih potaknjencev okrasnih rastlin, kamor spadajo tudi pelargonije, vplivajo naslednji dejavniki: genetski potencial, stanje matičnih rastlin, skladiščenje in transport potaknjencev, endogeni dejavniki (vsebnost ogljikovih hidratov, razmerje C/N ...) in okoljske razmere. V magistrski nalogi smo spremljali kakovost potaknjencev štirih različnih sort pelargonij ('Acapulco', 'Calliope Dark Red', 'Tango Dark Red' in 'Ville de Paris Red') glede na čas njihove dostave v vrtnarijo. Ugotoviti smo želeli ali različni termini dostave vplivajo na razlike v vsebnosti enostavnih sladkorjev (fruktoze, glukoze, saharoze) v potaknjencih ter kakšna je potem uspešnost koreninjenja. Preverili smo tudi ali lahko merjenje vsebnosti sladkorjev z refraktometrom uporabimo kot poceni in hitro metodo za oceno kakovosti potaknjencev. Vsebnost izbranih sladkorjev smo izmerili s pomočjo tekočinske kromatografije visoke ločljivosti, pri ocenjevanju ukoreninjenosti pa smo si pomagali z boniturno shemo. Raziskava je pokazala, da je termin dostave vplival na vsebnost skupnih sladkorjev pri vseh 4 sortah, vendar je v nasprotju s pričakovanji povprečna vsebnost skupnih sladkorjev s terminom dostave upadala in ne naraščala (največjo vsebnost smo izmerili v prvem terminu dostave). Uspešnost koreninjenja se je z vsakim naslednjim terminom izboljševala, pri vseh sortah so se najbolje ukoreninili potaknjenci iz petega termina dostave, najslabše pa tisti iz prvega. Ugotovili smo tudi, da lahko metodo merjenja vsebnosti suhe topne snovi (°Brix) uporabimo za napoved vsebnosti sladkorjev, ne omogoči pa nam predvideti kakovosti potaknjencev.

Keywords

okrasne rastline;pelargonije;rast nadomestnih korenin;vsebnost sladkorjev;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL BF - Biotechnical Faculty
Publisher: [A. Fekonja]
UDC: 635.921:631.535:631.533.1(043.2)
COBISS: 79659779 Link will open in a new window
Views: 165
Downloads: 34
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Other data

Secondary language: English
Secondary title: Influence of carbohydrate content in pelargonium cuttings (Pelargonium spp.) on the quality of rooting
Secondary abstract: The quality of rooting of ornamental plant cuttings, is influenced by several factors. Most important are: genetic potential, condition of stock plants, storage and transport of cuttings, endogenous factors (carbohydrate content, C / N ratio ...) and environ-mental conditions. In this master`s thesis we researched how different delivery times influence the carbohydrate content (fructose, glucose, sucrose) in cuttings of 4 dif-ferent varieties of geranium ('Acapulco', 'Calliope Dark Red', 'Tango Dark Red' and 'Ville de Paris Red') and how this affects the rooting performance. We also checked if measuring the sugar content with a refractometer could be used as a cheap and fast method for assessing the quality of cuttings. Selected carbohydrates in cuttings were measured by high performance liquid chromatography (HPLC), and we used a visual scale to assess adventitious root growth of cuttings. The statistical analysis of the results showed that the delivery time affected the total sugar content in all 4 varieties, but contrary to expectations, the average total sugar content decreased with the de-livery date not increased as we expected. The highest content of sugars was measured at the first delivery date. Statistical analysis also showed that the quality of rooting has increased with every delivery, the best quality of rooting was observed at the fifth delivery date (at all 4 varieties) and the worst quality of rooting was observed at the first delivery date. We also found out that measuring the sugar content with a refrac-tometer does not allow us to predict the quality of cuttings.
Secondary keywords: ornamental plants;pelargonium;adventitious roots;sugar content;
Type (COBISS): Master's thesis/paper
Study programme: 0
Thesis comment: Univ. v Ljubljani, Biotehniška fak., Oddelek za agronomijo
Pages: XII, 55 f., [5] f. pril.
ID: 13682562