Vpliv selena na fiziološke in biokemijske lastnosti navadne ajde in tatarske ajde, gojene na različnih nadmorskih višinah

Luzar, Neja (author), Germ, Mateja (mentor), Golob, Aleksandra (comentor)

Navadno ajdo (Fagopyrum esculentum Moench) in tatarsko ajdo (Fagopyrum tataricum (L.) Gaertn.) smo gojili na treh lokacijah z različnimi nadmorskimi višinami: v Ljubljani (300 m n. m.), Podbežah (600 m n. m.) in Javorju (1100 m n. m.). Poskusne rastline posamezne vrste smo na vsaki lokaciji razdelili v dve skupini. Eno skupino smo foliarno poškropili s kalijevim selenatom (10 mg Se L-1; tretirana skupina), drugo pa z destilirano vodo (kontrolna skupina). Zanimal nas je odziv rastlin na razmere na različnih nadmorskih višinah in na dodatek Se. Izmerili in izračunali smo njihove biokemijske lastnosti (vsebnosti klorofilov a in b, karotenoidov, UV-A in UV-B absorbirajočih snovi ter antocianov), fiziološke lastnosti (potencialno in dejansko fotokemično učinkovitost fotosistema II ter stopnjo transpiracije) ter anatomske lastnosti (debeline listov in posameznih listnih tkiv, število in premer kristalov kalcijevega oksalata v listih). Rezultati merjenja so bili pri obeh vrstah ajde raznoliki. Med poskusnimi rastlinami, gojenimi na različnih nadmorskih višinah, so bile posamezne razlike v merjenih lastnostih, a nismo zabeležili gradienta vrednosti, ki bi kazal na vpliv nadmorske višine na omenjene lastnosti. Tudi ugotovljene razlike med tretiranimi in kontrolnimi skupinami rastlin s posameznih lokacij niso jasno pokazale vpliva Se. Razlike med različnimi skupinami poskusnih rastlin so bile najverjetneje naključne. Visoke izmerjene vrednosti potencialne fotokemične učinkovitosti fotosistema II pri vseh poskusnih skupinah kažejo, da so bile poskusne rastline v dobrem fiziološkem stanju in da niti razmere na posamezni nadmorski višini niti dodatek Se niso predstavljali nepovratnega stresa za rastline.

• Language: Slovenian
• Keywords: navadna ajda, tatarska ajda, Fagopyrum esculentum, Fagopyrum tataricum, nadmorska višina, selen
• Work type: Master's thesis/paper
• Organization: BF - Biotechnical Faculty
• Year: 2021
• PID: 20.500.12556/RUL-128147
• COBISS.SI-ID: 71963907
• Publication date in RUL: 04.07.2021

Secondary language

• Language: English
• Title: Impact of selenium on physiological and biochemical properties of common buckwheat and Tartary buckwheat grown at different altitudes

Abstract

Common buckwheat (Fagopyrum esculentum Moench) and Tartary buckwheat (Fagopyrum tataricum (L.) Gaertn.) were grown at three locations with different altitudes: in Ljubljana (300 m a.s.l.), Podbeže (600 m a.s.l.) and Javorje (1100 m a.s.l.). Experimental plants of both species were divided into two groups. One group was foliarly treated with potassium selenate (10 mg Se L-1; Se treated group), and another one with distilled water (control group). We measured biochemical parameters (contents of chlorophyll a and b, carotenoids, UV-A and UV-B absorbing compounds, and anthocyanins), physiological parameters (potential and effective photochemical efficiency of photosystem II, transpiration rate) and anatomical parameters (thicknesses of leaves and leaf tissues, number and size of calcium oxalate druses in leaves). The results did not suggest clear connection between altitude and Se treatment, and parameters measured. There were not any clear gradients of values measured in plants grown at different altitudes, nor consistent differences between Se treated and control group from the same location. Therefore we conclude that observed differences were probably due to coincidence. High values of potential photochemical efficiency of photosystem II suggest good physiological state of plants in all experimental groups, and imply that conditions at different altitudes did not pose stress to the plants.

• Keywords: common buckwheat, Tartary buckwheat, Fagopyrum esculentum, Fagopyrum tataricum, altitude, selenium