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Lignifikacija traheid zdravih in prizadetih jelk (Abies alba) : diplomsko delo (univerzitentni študij) = Lignification of tracheids in healthy and declining silver first (Abies alba) : graduation thesis (university studies)Gričar, Jožica, gozdarkaOd začetka 60-ih do poznih 80-tih so bile mnoge jelke (Abies alba) v Sloveniji podvržene propadanju s simptomi, kot sta visoka osutost krošnje ter zmanjšan ksilemski prirastek. Pri preživelih ... drevesih se je stanje kasneje začelo izboljševati, nekatera drevesa pa so še vedno prizadeta. Primerjali smo porazdelitev lignina v celičnih stenah traheid kasnega lesa nastalih v tekočem letu pri zdravih in prizadetih jelkah na vzorcih odvzetih v sredini oktobra. Porazdelitev lignina smo določevali z obarvanjem s kalijevim permanganatom (KMnO4) v povezavi s transmisijsko elektronsko mikroskopijo. S programom Analysis 2.1 smo izmerili tangencialne debeline celičnih sten traheid nastalih v tekočem letu pri zdravih in prizadetih jelkah. Pri prizadetih jelkah je bila celična stena dokončno oblikovana in lignificirana. Na istočasno odvzetih vzorcih zdravih jelk v traheidah kasnega lesa neposrednoob kambiju sloj S3 in bradavičasti sloj še nista bila vidna. Področje sloja S2 ob lumnu ni bilo lignificirano, medtem ko je bila elektronska gostota v združeni srednji lameli ter sloju S2 ob njej po obravnavanju s KMnO4 visoka. To nakazuje, da je v najmlajših traheidah zdravih dreves še vedno potekal proces lignifikacije, kambij pa je izgledal kot v mirujočem stanju. Na osnovi rezultatov lahko sklepamo, da se aktivnost kambija pri zdravih jelkah zaključi kasneje kot pri prizadetih. Eden izmed razlogov za zmanjšanje širin branik pri prizadetih drevesih je skrajšano obdobje kambijeve aktivnosti . Razlike v srednjih debelinah tangencialnih celičnih sten med zdravimi in prizadetimi jelkami niso bile statistično značilne (p<0,05).Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [J.Gričar], 2001Language - slovenianCOBISS.SI-ID - 798857
Author
Gričar, Jožica, gozdarka
Other authors
Čufar, Katarina |
Grünwald, Claudia |
Oven, Primož
Topics
Abies alba |
lignin |
celična stena |
traheide |
kasni les |
Abies alba |
lignin |
cell wall |
tracheids |
latewood
Library | Call number – location, accession no. ... | Copy status |
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BF, Dept. of Wood Technology, Lj. | Knjižnica BF za lesarstvo dn 711 IN: 020010152 |
available - reading room |
BF, Dept. of Wood Technology, Lj. | Knjižnica BF za lesarstvo dn 711 01 IN: 020020218 |
available - reading room |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Gričar, Jožica, gozdarka | 22609 |
Čufar, Katarina | 02937 |
Oven, Primož | 11223 |
Source: Personal bibliographies
and: SICRIS
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