Page 59 - PowerPoint Presentation

UTICAJ AEROZAGAĐENJA NA EKOFIZIOLOŠKE I MORFOLOŠKE KARAKTERISTIKE
ĈETINA TISE U BEOGRADU

EFFECTS OF AIR POLUTION ON ECOPHYSIOLOGICAL AND MORPHOLOGICAL
CHARACTERISTICS OF YEW NEEDLES IN BELGRADE

Autor: ISIDORA CVETINČANIN, VII-3, OŠ “Sveti Sava”, Beograd, Mentor: GORDANA GAJID

REZIME
U radu je analiziran sadržaj hlorofila i ukupnih karotenoida, kao i morfološke promene četina individua
Taxus baccata L. (tise) koje rastu u Botaničkoj bašti, lociranoj neposredno uz veoma prometnu ulicu (zagađeno
stanište) i u arboretumu Šumarskog fakulteta, koji se nastavlja na park-šumu Košutnjak (kontrolno stanište).
Istraživanja su rađena u cilju utvrđivanja nivoa adaptiranosti tise na prisustvo polutanata, kao i posedovanja
potencijala za ozelenjavanje urbanih prostora. Ispitivanja su obavljena u februaru 2007. godine. Manja količina Chl
b i Chl a+b, visok odnos Chl a/b, a nizak odnos Chl a+b/Tot Carot u četinama tise iz Botaničke bašte u odnosu na
kontrolni lokalitet, kao i odsustvo razlika u količini Chl a i Tot Carot između staništa, ukazuju na aktiviranje
mehanizama zaštite hlorofila i fotosintetičkog aparata, te i na sposobnost adaptacije ove vrste na stresne uslove
staništa. Prisustvo vidljivih oštedenja četina tise u Botaničkoj bašti izraženih u vidu hloroza, vršnih i ivičnih nekroza,
sušenja četina i grančica je posledica direktne i intenzivne izloženosti polutantima poreklom iz saobradaja.
Međutim, uočeno je da individue tise imaju vedi broj zdravih četina nego oštedenih. Rezultati ukazuju da tisa
poseduje ekološki potencijal za sadnju na urbanim prostorima.

Ključne reči: polutanti, tisa, hlorofili, karotenoidi, oštedenja četina, ekofiziološke adaptacije

SUMMERY

Paper analyzed results of chlorophylls and total carotenoids as well as morphologycal alterations needles
of Taxus bacata L. (yew) in the Botanical garden, located in immidiate vicinity of the street with heavy traffic
(poluted site) and arboretum of Faculty of Forestry in vicinity of large forest complexs Kosutnjak (control site). The
aim of the study was to established adaptation level of yew in the presence of pollutants as well as possessing
potencial for urban greening. Researsch was conducted in February 2007. Lower Chl b and Chl a+b contents, higher
ratio of Chl a/b and lower ratio of Chl a+b/Tot Carot in yew needles from Botanical garden in comparison with
control site, as well as absence of differences in Chl a and Tot Carot contents between sites, pointed out activated
protecting mechanisms of chlorophyll and photosyntetic aparat and adaptation of this species on urban stress. The
presence of yew visible symptoms damages of needles in Botanical garden which expressed in form chloroses,
apical and marginal necroses, dry needles and branch where result of direct and intensive exposure to motor
vehicle exhaust pollutants. However, yew individuals had more „sound“ needles than damaged. It can be concluted
that studied yew possessess ecological potencials for planting in urban spaces.

Key words: pollutants, yew, chlorophylls, carotenoids, needles injury, ecophysiological adaptions