Show document

A+ | A- | | SLO | ENG

Title: Vpliv agronomskih parametrov na gostoto in dolžino listnih rež pri ameriškem slamniku (Echinacea purpurea (L.) Moench) Authors: ID Kolar, Darja (Author) ID Virant, Igor (Author) ID Kreft, Samo (Author) Files: URL - Source URL, visit https://ojs.zrc-sazu.si/folia_bio_geo/article/view/7246   PDF - Presentation file, download (1,28 MB) MD5: 9400E5CC00DFCC0C212B0B40E22E2D8A   Language: Slovenian Typology: 1.01 - Original Scientific Article Organization: SAZU - Slovenian Academy of Sciences and Arts Abstract: Pripravki ameriškega slamnika (Echinacea purpurea) se zaradi svojih imunostimulativnih učinkov zelo pogosto uporabljajo predvsem pri prehladih in gripi. Uporaba in popularnost teh pripravkov je v zadnjih letih zelo narasla, kar dokazujejo tudi vedno večja ponudba na trgu. Številne raziskave so bile narejene na področju gojenja, kvantifikaciji aktivnih učinkovin, učinkovitosti in varnosti. Ugotavljali smo, kakšna je gostota listnih rež na zgornji in spodnji strani listov ter merili dolžino listnih rež na spodnji strani listov ameriškega slamnika pri 213 vzorcih. Vzorci so se razlikovali po načinu gojenja rastlin. Gostote in dolžine rež smo merili z mikroskopiranjem odtisov epiderme, ki smo jih naredili s prozornim lakom. Preverili smo vpliv velikosti lista in vpliv pozicije na listu, kjer smo izvajali meritve. Ugotovili smo, da se gostote in dolžine listnih rež med lokacijami po širini lista značilno razlikujejo. Zato smo v nadaljevanju poskusa merili reže na določenem mestu na sredini med osrednjo žilo in listnim robom. Najbolj izrazit in signifikanten vpliv na lastnosti listnih rež ima sezona žetve. Pri jesenski žetvi v primerjavi s poletno je bila gostota rež zgornje strani listov 66 % večja (p<0,001), dolžina rež spodnje strani pa 11 % večja (p<0,001). Pri proučevanju vplivov agronomskih dejavnikov (namakanje, starost rastlin, lokacija njive) nismo našli signifikantnih vplivov na lastnosti listnih rež. Opazili smo tudi signifikantno negativno korelacijo med gostoto in dolžino rež ter pozitivno korelacijo med gostoto rež spodnje in zgornje strani lista. Večje rastline so imele daljše listne reže in manjšo gostoto listnih rež v primerjavi z manjšimi rastlinami. Ta vpliv je bil statistično signifikanten, vendar majhen. Rastline z večjim odstotkom suhe mase v požeti biomasi (manjša vsebnost vode) so imele večjo gostoto rež in manjšo dolžino listnih rež, vendar so povezave signifikantne le pri poletni žetvi. Med koncentracijami cikorne in kaftarne kisline in gostoto ter dolžino listnih rež ni signifikantnih korelacij. Keywords: listne reže, Echinacea purpurea, ameriški slamnik Publication status: Published Publication version: Version of Record Publication date: 24.01.2019 Year of publishing: 2018 Number of pages: str. 59-74 Numbering: letn. 59, št. 2 PID: 20.500.12556/DiRROS-25686  UDC: 582.991 ISSN on article: 1855-7996 DOI: 10.3986/fbg0044  COBISS.SI-ID: 4638833  Copyright: Imetniki avtorskih pravic na prispevkih so avtorji Publication date in DiRROS: 27.01.2026 Views: 47 Downloads: 22 Metadata:    Cite this work Plain text BibTeX EndNote XML EndNote/Refer RIS ABNT ACM Ref AMA APA Chicago 17th Author-Date Harvard IEEE ISO 690 MLA Vancouver : Copy citation

Share: Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

Record is a part of a journal

Title:	Folia biologica et geologica
Publisher:	Slovenska akademija znanosti in umetnosti
ISSN:	1855-7996
COBISS.SI-ID:	248490496

Licences

License:	CC BY-SA 4.0, Creative Commons Attribution-ShareAlike 4.0 International
Link:	http://creativecommons.org/licenses/by-sa/4.0/
Description:	This Creative Commons license is very similar to the regular Attribution license, but requires the release of all derivative works under this same license.
Licensing start date:	24.01.2019
Applies to:	VoR

Secondary language

Language:	English
Title:	The influence of agronomic parameters on the density and length of leaf stomata in purpure coneflower (Echinacea purpurea (L.) Moench)
Abstract:	Herbal preparations from Echinacea purpurea (purple coneflower) are often used in common cold and flu because of their immune stimulatory effects. The popularity of these products has grown considerably in recent years, and there is increasing market supply. Numerous studies have been made investigating the cultivation, quantification of active ingredients, safety and efficacy of Echinacea purpurea. In this study we determined the density of the leaf stomata on the lower and upper sides of the leaves and the length of the leaf stomata on the lower side of leafs in 213 samples of E. purpurea plants, which differed in the cultivation parameters. Density and length were measured with the microscopic examination of the imprint of the epidermis, which we made with clear nail varnish. We checked the effect of the size of the leaf and the influence of the measuring position on the leaf. We found that the densities and the length of the stomata were significantly different across the width of the leaf. Therefore, we carried out measurements at a constant position in the middle between the central vein and the leaf edge. The most pronounced parameter influencing the stomata properties was season of harvesting. In the autumn harvest compared to summer, the density of the stomata of the upper side was 66% higher (p <0.001) and the stomata length on the lower side was 11% higher (p <0.001). We did not find significant effects of any of the studied agronomical parameters (irrigation, age of plants and location of plantation) on the properties of leaf stomata. We also observed a significant negative correlation between the stomata density and stomata length and a positive correlation between the stomata density of the lower on the upper side of the leaf. We observed that larger plants had longer stomata and lower stomata density compared to smaller plants. This effect was statistically significant but small. Plants with a higher percentage of dry mass in harvested biomass (lower water content) had a higher stomata density and smaller stomata lengths, but the correlation was significant only in summer harvest. There are no significant correlations between chicoric and caftaric acids concentrations and the stomata density or length.
Keywords:	leaf stomata, Echinacea purpurea, purple coneflower

Collection

This document is a part of these collections:

1. Folia biologica et geologica

Back