master's thesis
Dormancy and germination of johnsongrass seed (Sorghum halepense (L.) Pers.)

Adrijana Balić (2015)
Metadata
TitleDormantnost i klijavost sjemena divljeg sirka (Sorghum halepense (L.) Pers.)
AuthorAdrijana Balić
Mentor(s)Renata Baličević (thesis advisor)
Abstract
Cilj istraživanja bio je utvrditi učinkovitost različitih metoda prekida dormantnosti sjemena sirka (Sorghum halepense (L.) Pers.) odnosno njihov utjecaj na klijavost i rast klijanaca. Uz kontrolni tretman primijenjeno je osam tretmana za prekidanje dormantnosti sjemena: potapanje sjemena u destiliranu vodu, zagrijavanje u vodi na 60 °C, potapanje u 0,2% otopinu KNO3, te 2% otopinu NaOCl, tretiranje koncentriranom H2SO4 tijekom 5 i 10 min, te tijekom 5 min i naklijavanje u tami, te kombinirani tretman sumporne kiseline (5 min) i 1,5% otopine KNO3. Sjeme divljeg sirka u kontrolnom tretmanu imalo je vrlo nisku klijavost, svega 2,8%. Svi tretmani povećali su klijavost sjemena, a najviša klijavost zabilježena je tretmanu s kombinacijom H2SO4 i KNO3 (35,0%) te tretmanu s 2% otopinom NaOCl (30,6%). Primjena NaOCl smanjila je duljinu korijena klijanaca divljeg sirka za 40,9% u odnosu na kontrolu, dok su svi tretmani imali pozitivan utjecaj na duljinu izdanka. Ukupna duljina klijanaca bila je najviša pri tretiranju sjemena sumpornom kiselinom tijekom 5 minuta. S druge strane, tretmani nisu pokazali značajan utjecaj na svježu masu klijanaca divljeg sirka. Najbrže je klijalo sjeme u tretmanu s kombinacijom H2SO4 i KNO3 (4,58 dana), a najsporije kod potapanja sjemena u vodu (8,16 dana) te u 2% otopinu NaOCl (8,92 dana).
Keywordsjohnsongrass (sorghum halepense (L.) Pers.) seed dormancy germination germination dynamics
Parallel title (English)Dormancy and germination of johnsongrass seed (Sorghum halepense (L.) Pers.)
Committee MembersVlatka Rozman
Anita Liška
GranterSveučilište Josipa Jurja Strossmayera u Osijeku
Poljoprivredni fakultet
Lower level organizational unitsZavod za Zaštitu bilja
PlaceOsijek
StateCroatia
Scientific field, discipline, subdisciplineBIOTECHNICAL SCIENCES
Agronomy
Crop Production
Study programme typeuniversity
Study levelgraduate
Study programmePlant Production, specialization: Plant Production, Plant Nutrition and Soil Science, Plant Selection and Seed Production, Plant Protection
Academic title abbreviationmag. ing. agr.
Genremaster's thesis
Language Croatian
Defense date2015-09-22
Parallel abstract (English)
The aim of this study was to determine the effectiveness of various methods on breaking seed dormancy of johnsongrass (Sorghum halepense (L.) Pers.) and their influence on germination and seedlings growth. Beside control treatment, eight treatments for breaking dormancy of seeds were applied: seeds immersion in water, seed heating in water at 60 °C, immersion in a 0.2% solution of KNO3, and 2% solution of sodium hypochlorite, treatments with concentrated H2SO4 for 5 and 10 minutes, and for 5 min and germination in darkness, and the combined treatment of sulphuric acid (5 min) and 1.5% KNO3 solution. Seeds of johnsongrass had very low germination percentage in the control treatment, only 2.8%. All treatments increased the germination of seeds, and the highest germination was observed in treatment with combination of H2SO4 and KNO3 (35.0%) and treatment with 2% NaOCl (30.6%). NaOCl reduced the root length of seedlings for 40.9% compared to control, while all treatments had a positive effect on the shoot length. Total seedlings length was the highest when seeds were treated for 5 minutes with sulphuric acid. On the other hand, none of the treatments showed significant effect on johnsongrass seedlings fresh weight. Seed germinated fastest in treatment with a combination of H2SO4 and KNO3 (4.58 days), and slowest when seeds were immersed in water (8.16 days) and in the 2% solution of NaOCl (8.92 days).
Parallel keywords (Croatian)divlji sirak ( Sorghum halepense (L.) Pers.) dormantnost klijavost dinamika klijanja
Resource typetext
Access conditionOpen access
Terms of usehttp://rightsstatements.org/vocab/InC/1.0/
Notediplomski rad
URN:NBNhttps://urn.nsk.hr/urn:nbn:hr:151:245041
CommitterLjiljana Vučković Vizentaner