diplomsko delo
Povzetek
Etilen je majhna plinska molekula, ki so jo raziskovalci odkrili v 19. stoletju in jo kasneje prepoznali kot prvi rastlinski hormon. Njena vloga je najbolj prepoznavna v biologiji rastlin, saj sodeluje v različnih procesih tekom celotnega življenjskega cikla rastline. Ti procesi vključujejo kalitev rastline, razvoj korenin in cvetov, zorenje plodov, senescenco, abscizijo in odgovore rastline tako na biotske (patogeni) kot na abiotske dejavnike (poškodba rastline, pomanjkanje kisika, mraz, poplave in suše). Sintetizira se iz prekurzorja 1-aminociklopropan-1-karboksilne kisline (ACC), njegovo pretvorbo pa katalizira encim ACC-oksidaza. ACC-oksidazo najdemo tako v vegetativnih, kakor v reproduktivnih tkivih rastline. Z raziskavo smo želeli ugotoviti, katera so specifična mesta, kjer se nahaja ACC-oksidaza v plodovih paradižnika. Encim smo lokalizirali z metodo imunolokalizacije z uporabo specifičnih primarnih protiteles proti ACC-oksidazi in raziskali, kako vpliva uporaba različnih pufrov v postopku povrnitve antigenov. Z imunolokalizacijo se obarvajo specifična mesta, kjer se nahaja ACC-oksidaza, predvsem na bazi ploda in v predelu žil v plodu ter v peclju ploda. Z uporabo različnih pufrov v postopku povrnitve antigenov smo opazili razlike v jakosti specifičnega obarvanja in količini nespecifičnega barvanja ozadja. Najmočnejši specifičen signal in hkrati najmanj nespecifično barvanje ozadja smo dobili z uporabo citratnega pufra pH 6 v postopku povrnitve antigenov. Kontrolne preparate smo barvali z uporabo neimunega seruma namesto z specifičnimi primarnimi protitelesi. V kontrolnih preparatih nismo zaznali specifičnega obarvanja.
Ključne besede
etilen;zorenje plodov;imunolokalizacija;
Podatki
Jezik: |
Slovenski jezik |
Leto izida: |
2018 |
Tipologija: |
2.11 - Diplomsko delo |
Organizacija: |
UL PEF - Pedagoška fakulteta |
Založnik: |
[N. Lavrič] |
UDK: |
58(043.2) |
COBISS: |
12138313
|
Št. ogledov: |
828 |
Št. prenosov: |
127 |
Ocena: |
0 (0 glasov) |
Metapodatki: |
|
Ostali podatki
Sekundarni jezik: |
Angleški jezik |
Sekundarni naslov: |
Localization of the ACC-Oxidase enzyme in the tomato (Solanum lycopersicum)fruit |
Sekundarni povzetek: |
Ethylene is a small gaseous molecule that was discovered in the 19th century and was later recognized as the first plant hormone. It plays an important role in plant biology because it is involved in many aspects of the plant life cycle, including seed germination, root and flower development, fruit ripening, senescence, abscission and responses to biotic ( pathogen attack) and abiotic (wounding, hypoxia, chilling, floods and droughts) stresses. Ethylene is synthesized from 1-aminocyclopropane-1-carboxylic acid (ACC) where the reaction is catalyzed by the enzyme ACC oxidase. ACC oxidase is expressed in all vegetative and reproductive plant tissues. The aim of the study was to find out the location of ACC oxidase in the developing fruit of tomato. To localize the enzyme, we used immunolocalization with specific primary antibodies against ACC oxidase and examined the effect of different buffers in antigen retrieval. Using immunolocalization we detected ACC oxidase specifically inside the fruit and in the vascular region of the fruit and fruit pedicel. In the step of antigen retrieval during the immunolocalization process we used three different buffers that resulted in differences in the intensity of specific staining and the amount of nonspecific background staining. The strongest specific staining with the lowest background was achieved by using citrate buffer pH 6 in the step of antigen retrieval. Negative controls were stained using the nonimmune serum instead of specific primary antibodies. No specific staining was observed in the control sections. |
Sekundarne ključne besede: |
biology;botany;biologija;botanika; |
Vrsta datoteke: |
application/pdf |
Vrsta dela (COBISS): |
Diplomsko delo/naloga |
Komentar na gradivo: |
Univ. v Ljubljani, Pedagoška fak., Biologija - gospodinjstvo |
Strani: |
VIII, 23 str. |
ID: |
10973292 |