Spolni dimorfizem in razširjenost lovorolistnega volčina (Daphne laureola L.) na območju Bohorja : diplomsko delo - univerzitetni študij

Jagrič, Miha (author), Brus, Robert (mentor)

Ginodiecična vrsta lovorolistni volčin (Daphne laureola L.) je ena izmed šestih samoniklih vrst iz rodu volčinov (Daphne L.) v Sloveniji. Cilji naloge so bili: ugotoviti razširjenost lovorolistnega volčina na Bohorju, ugotoviti spolno strukturo populacij na izbranih ploskvah lovorolistnega volčina na Bohorju in njeno povezavo z rastiščnimi razmerami ter ugotoviti, ali poleg razlike v cvetovih obstajajo še druge značilne morfološke razlike med obojespolnimi in ženskimi rastlinami lovorolistnega volčina. V raziskavo so bile vključene štiri ploskve na severnem delu Bohorskega pogorja, in sicer po dve v vsakem višinskem pasu. Skupno je bilo za preučevanje spolne strukture popisanih 277 osebkov, med njimi pa še 90 osebkov za preučevanje spolnega dimorfizma. Kot je bilo predpostavljaljeno, je območje razširjenosti lovorolistnega volčina na Bohorju relativno majhno. Ugotovljeno je bilo, da v spodnjem delu sega območje razširjenosti tudi v kvadrant 9959/1 (kartiranje srednjeevropske flore), kjer lovorolistni volčin do sedaj še ni bil zabeležen. Delež ženskih rastlin po ploskvah se je gibal med 3,17 % in 37,17 % in je bil obratno sorazmeren z naraščanjem nadmorske višine. Pogostnost pojavljanja, deleži ženskih rastlin in morfološke lastnosti rastlin so bile odvisne od dejavnikov okolja. Grmi so imeli v višjem pasu več cvetov, listi pa so bili daljši, z bolj topim vrhom listne ploskve in ostrejšim dnom listne ploskve. Razlike med obojespolnimi in ženskimi osebki so bile majhne in večinoma niso bile statistično značilne. Značilne razlike so bile ugotovljene le pri dveh znakih, in sicer so imeli ženski osebki značilno več debel, oboje spolni osebki pa značilno daljše liste.

• Language: Slovenian
• Keywords: Daphne laureola L., lovorolistni volčin, spolni diformizem, razširjenost, Bohor, spolna struktura, morfometrijska analiza
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [M. Jagrič]
• Year: 2012
• Number of pages: X, 65 str.
• PID: 20.500.12556/RUL-16066
• UDC: 630*18
• COBISS.SI-ID: 3389350
• Publication date in RUL: 11.07.2014

Secondary language

• Language: Unknown

Abstract

Gynodioecious Daphne laureola L. is one of six species from Genus Daphne L., native in Slovenia. The main goals of this research were: determine the area of distribution of species Daphne laureola L. in the area of Bohor, determine the sexual structure of populations and itʼs correlation with site conditions and determine if there are any other morphological differences among females and hermaphrodites except in structure of the flowers. In this research four sites were included - two in each altitude range. Sites were located in the north side of Bohor. Altogether 277 plants were studied for sexual structure and 90 of them were additionally studied for sexual dimorphism. As it was assumed, the area of distribution of species Daphne laureola in the area of Bohor is relatively small. It was discovered that in lower part, area of distribution reaches in quadrant 9959/1(Central European flora mapping), where spaecies was not jet recorded. Sex ratio of female plants was between 3,17 % and 37,17 % and was lower in higher areas. It was concluded that the frequency of plants, proportion of female individuals and morphological traits of plants are highly related with environmental factors. The plants had more flowers in the higher areas, leafs where longer and had rounder tips and the base of leafs was sharper. The differences among females and hermaphrodites were small and were not statistically significant. Statistically significant differences appeared only in two traits: females had significantly higher number of trunks and hermaphrodites had significantly longer leafs.