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Journal : JURNAL PHOTON

Komposisi Senyawa 1.8-cineole dari Ekstrak Daun Eucalyptus pellita Menggunakan 2 Jenis Pelarut serta Fitotoksisitas Terhadap Gulma Borreria alata (Aubl) DC. Rangkuti, Muhammad Syaid; Hapsoh, Hapsoh; Adiwirman, Adiwirman
Photon: Jurnal Sain dan Kesehatan Vol. 14 No. 1 (2023): Jurnal Photon
Publisher : LPPM Universitas Muhammadiyah Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jp.v14i1.4645

Abstract

The monoterpene group has a molecule called 1.8-cineole as its primary component. The compound 1.8-cineole is one of the most powerful allelochemicals released by many species, such as Eucalyptus spp., which is toxic to other plants. This study intends to identify a suitable solvent to extract 1.8-cineole derived from Eucalyptus pellita leaf extract using 2 types of solvents, ethanol and aquadest along with their phytotoxicity properties. This research was conducted in 2 stages. The first stage involved the extraction of Eucalyptus pellita leaves using the Soxhlet method, and the extraction results were analyzed with GC/MS. The second stage of the phytotoxicity test against Borreria alata (Aubl) DC., weeds used seven levels of extraction formula treatment. The extraction results using ethanol solvents showed higher yields of 1.8-cineole compound composition compared to using aquadest solvents. The results of the phytotoxicity test of variance showed a significant difference in the wet and dried mass of weeds. The extraction formula with a concentration of 50% Eucalyptus pellita leaf extract using ethanol as a solvent has the best phytotoxicity properties compared to other extraction formulas.
Physiological of Various Genotypes of Cayenne pepper (Capsicum frutescens L.) Under Heat Stress Nanda, Riri Fitria; Adiwirman, Adiwirman; Herman, Herman
Photon: Jurnal Sain dan Kesehatan Vol. 16 No. 1 (2025): Journal Photon
Publisher : LPPM Universitas Muhammadiyah Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jp.v16i1.8698

Abstract

Cayenne pepper (Capsicum frutescens L.), a member of the Solanaceae family, is vulnerable to rising temperatures caused by global warming, which may reduce productivity and impair plant growth. This study evaluated the adaptation of four cayenne pepper genotypes (Pelita, Dewata, Bara, and Taruna) to high-temperature stress under greenhouse conditions. A split-plot design was applied, with temperature regimes as the main plot, consisting of normal daily temperature and heat stress conditions (±4°C–8°C above normal temperature), while genotypes were assigned as sub-plots. Observed parameters included physiological traits, such as stomatal conductance and transpiration rate, and morphological traits, including plant height, stem diameter, flowering time, harvesting age, and fruit weight. Data were analysed using ANOVA followed by a 5% significance test. The results demonstrated that high-temperature stress significantly affected both physiological and morphological characteristics of cayenne pepper plants. Temperature stress generally reduced fruit weight compared with normal daily temperature conditions. Responses to heat stress were observed in stomatal conductance, transpiration rate, plant height, stem diameter, leaf morphology, flowering age, harvest age, and fruit yield. Among the tested genotypes, Taruna exhibited superior physiological adaptation through stable stomatal conductance, chlorophyll content, photosynthetic activity, and leaf morphology under stress conditions. However, the Dewata genotype produced the highest fruit weight per plant under elevated temperature conditions compared with Pelita, Bara, and Taruna. These findings provide valuable insights for developing cayenne pepper varieties adaptive to climate change, with emphasis on physiological stability and yield performance as key selection criteria.