Page 7 - PowerPoint Presentation

ZNAĈAJ POZNAVANJA POLENA ENDEMIĈNE VRSTE LUKA U CILJU ZAŠTITE
BIODIVERZITETA

THE IMPORTANCE OF STUDY OF THE POLLEN OF AN ENDEMIC SPECIES OF ONION FOR
PROTECTION OF BIODIVERSITY

Mentor: Dr Dušica Dalid, viši naučni saradnik OŠ ,,Radojka Lakid”

Autor: Kristina Petrovid i Vladimir Vučidevid, VIII razred, OŠ ,,Radojka Lakid”

Rezime

Allium ericetorum je endemična i jako ugroženu biljna vrsta Pirinejskog, Apeninskog i Balkanskog poluostrva.
Atraktivni beli, krem ili svetlo žuti cvetovi krase ovaj luk, koji zbog toga nosi narodni naziv bledi luk Raste na
stenovitim i ekološki čistim mestima. Nema lukovicu kao vedina lukova, ved rizom. U njegovim prašnicima se nalazi
polen različite veličine i oblika. Samo 10 % analiziranog polena je sitno (embriogeni polen), dok ostatak čini krupniji
(neembriogeni polen). Ova endemična vrsta se razmnožava uz pomod vetra, što smo zaključili na osnovu činjenice
da sva analizirana polenova zrna imaju 3 jedra. Sedamdeset procenata polenovih zrna zadržava vijabilnost posle 3
godine od momenta sakupljanja. Dvadeset procenata polenovih zrna je poluvijabilno, a samo 10 % nevijabilno.
Dugo zadržavanje vijabilnosti može pomodi održavanju ove vrste u prirodi i pored činjenice da je mali procenat
polena (10 %) embriogen.

Allium ericetorum je jako ugrožena biljna vrsta, te stoga što bolje poznavanje građe i vijabilnosti polena, kao i
načina razmnožavanja može pomodi zaštiti i očuvanju ove vrste u prirodi.

Ključne reči: allium, polen, vijabilnost, broj jedara, zažštita biodiverziteta

Summary

Allium ericetoum is an endemic and much endangered plant species which grows on Iberian, Apennines and
Balkan penisulas. Attractive white, cream or light yelow flowers decorate this onion and because of that its
common, folk name is pale onion. It grows on rocky and ecologically clean places. It doesnt have a bulb like other
onions, instead it has a rhisome. In its stamens there is pollen and it is of different sizes and shapes. Only 10% of
the analyzed pollen is small (embriogenic pollen), while the rest is bigger (not embriogenic). This endemic species
reproduces itself with the help of the wind which we concluded on the basis of fact that all analyzed pollen grains
have 3 nuclei. Seventy percent of the pollen grains keep their viability after three years from the moment of
collecting. Twenty percent of pollen grains are semi-viable and only ten percent is not viable. The long priod of
viability may be useful for the survival of this species in nature despite the fact that a small percent of the pollen
(10%) is embriogenic.

Allium ericetorum is a very endangered species, so that better understanding of the structure and viability of
the pollen and its way of reproduction can help to protect and preserve this species in nature.

Key words: allium, pollen, viability, number of nuclei, biodiversitety protection