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All Journal Agrosains: Jurnal Penelitian Agronomi Agrotechnology Research Journal
Gusrinaldi, Gusrinaldi
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Agriculture, Biological Sciences & Forestry

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Respon Fisiologi Pasak Bumi (Eurycoma longifolia, Jack) di Bawah Cekaman Kekeringan Zulfahmi, Zulfahmi; Irnanda, Eko; Gusrinaldi, Gusrinaldi; Elfianis, Rita; Rosmaina, Rosmaina
Agrosains : Jurnal Penelitian Agronomi Vol 27, No 2 (2025): Agrosains: Jurnal Penelitian Agronomi
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/agsjpa.v27i2.109126

Abstract

Drought stress is one of the abiotic factors that can inhibit plant growth and yield. This study aims to assess the effect of drought stress on the physiological characteristics of pasak bumi (Eurycoma longifolia, Jack). This study used a completely randomized design with two treatments, namely P0 = daily watering (control) and P1 = drought stress for two days. Each treatment consisted of 15 plants; there were 30 sample plants. Parameters observed included chlorophyll content, stomatal conductance, transpiration rate, photosynthetic rate, and Water Use Efficiency. The results of this study showed that drought stress decreased chlorophyll content (5.81%), stomatal conductance (10.34%), transpiration rate (18.73%), photosynthetic rate (3.78%), and water use efficiency (33.127%) compared to control plants. Eurycoma longifolia Jack exhibits an adaptive physiological response to drought stress, characterized by moderate reductions in chlorophyll content, photosynthesis rate, and stomatal conductance while maintaining efficient photosynthetic activity. Although water use efficiency declined significantly, the findings indicate effective compensatory mechanisms, positioning this species as a potential candidate for cultivation under water-limited conditions.
Persentase Keberhasilan Persilangan Full Diallel beberapa Genotipe Cabai Rawit (Capsicum frutescens) dan Keragaman Fenotipe Karakter Buahnya Zulfahmi, Zulfahmi; Gusrinaldi, Gusrinaldi; Mirdhayati, Irdha; Rosmaina, Rosmaina
Agrotechnology Research Journal Vol 8, No 1 (2024): Agrotechnology Research Jurnal
Publisher : Perkumpulan Agroteknologi/Agroekoteknologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/agrotechresj.v8i1.85878

Abstract

Genetic expansion of plants can be done by crossing between plant genotypes. This research aims to determine the percentage of successful chili crosses using the full diallel method and determine the level of phenotypic diversity resulting from the crosses. This research used five cayenne pepper genotypes, viz. UIN-041, UIN-048, UIN-050, UIN-062, and UIN-063. The crossing of the five genotypes was carried out using the full diallel method. The parameters observed consisted of the percentage of successful crossing, fruit weight, fruit diameter, fruit length, and number of seeds. The data obtained were subjected to analysis of variance and calculation of the phenotypic diversity coefficient for each character. The results of this study showed that the percentage of successful crossing ranged from 15.00 - 43.30%. The highest value was observed in crossing UIN-041 x UIN-050 and the lowest in UIN-062 x UIN-048. The low successful percentage of crossing is influenced by the pollen condition of the male parents and the level of cross-compatibility. The phenotypic variability value of the fruit weight and fruit length characters was 0.48 and 1.50, respectively, and that was classified as narrow variability, while the fruit diameter and fruit number characters were 5.23 and 120.34, respectively, and classified as broad variability.
Co-Authors Elfianis, Rita Irdha Mirdhayati Irnanda, Eko Rosmaina Rosmaina Zulfahmi Zulfahmi