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All Journal Jurnal Agroqua: Media Informasi Agronomi dan Budidaya Perairan Journal of Applied Agricultural Science and Technology Agricultural Revolution Journal
Dini Puspita Yanty
Universitas Graha Nusantara
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Materials Science & Nanotechnology

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Effects of Naphthaleneacetic Acid and Kinetin on Chrysanthemum Plantlets in Vitro Saipul Sihotang; Magdalena Saragih; Swati Sembiring; Riduan Sembiring; Dini Puspita Yanty; Denny Akbar Tanjung; Elli Afrida
Journal of Applied Agricultural Science and Technology Vol. 9 No. 4 (2025): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jaast.v9i4.315

Abstract

Naphthaleneacetic acid (NAA) and kinetin play a crucial role in plant growth but must be used in correct proportions in order to produce the best outcomes. An optimal combination of both can enhance shoot, leaf, and root growth, whereas inappropriate doses may otherwise inhibit growth due to hormonal imbalance. This study examined the effects of the interaction between NAA and kinetin on the growth of chrysanthemum plants at eight weeks of age. The research was carried out using the Completely Randomized Design (CRD) in triplicate. The medium used was MS medium, supplemented with NAA at concentrations of 0–1.5 mg/L and kinetin at concentrations of 0–3 mg/L. The results indicate that NAA and kinetin positively influenced plant growth, but only when the optimal concentrations were applied. The best combination of NAA at 1.0 mg/L (N2) and kinetin at 3.0 mg/L (K3) produced the best results in terms of height (153 mm), number of leaves (31 leaves), number of roots (26 roots), and fresh weight (5.85 g). Increasing kinetin concentrations (K0-3) generally promoted plant growth, whereas excessive NAA concentrations (> 1.0 mg/L, N3) produced the opposite effect, likely due to toxicity or hormonal imbalance. The interaction between kinetin and NAA exhibited a synergistic effect up to a certain threshold, while excessive NAA application negatively impacted on plant development.
Rizobakteri Antagonis Sebagai Agen Biokontrol Fusarium oxysporum f.sp. capsici Penyebab Layu Fusarium Pada Cabai Merah (Capsicum annuum L.) Selviana Anggraini; Rahil Ade Rifqah; Pajri Ananta Yudha; Dini Puspita Yanty; Poppy Khairunnisa; Sumini; Aslan Sari Thesiwati
Jurnal Agroqua: Media Informasi Agronomi dan Budidaya Perairan Vol 24 No 1 (2026): Jurnal Agroqua
Publisher : University of Prof. Dr. Hazairin, SH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32663/ja.v24i1.5507

Abstract

Fusarium wilt caused by Fusarium oxysporum f.sp. capsici is one of the most destructive diseases affecting red chili pepper cultivation because it significantly reduces plant growth and yield. Disease management that still relies on synthetic fungicides may increase environmental pollution and promote pathogen resistance; therefore, environmentally friendly control alternatives are required. This study aimed to evaluate the effectiveness of several local rhizobacterial isolates as antagonistic agents against Fusarium wilt in red chili pepper. The novelty of this study lies in the evaluation of indigenous rhizobacterial isolates with dual functions as antagonistic agents against Fusarium oxysporum f.sp. capsici and as plant growth-promoting rhizobacteria (PGPR) capable of enhancing red chili pepper growth under both in vitro and in vivo conditions. The results showed that all rhizobacterial isolates significantly inhibited pathogen growth. Isolate UBI-Rz04 exhibited the highest inhibition rate of 85.78% and the lowest fungal biomass (0.03 g) under in vitro conditions. In the in vivo assay, isolate UBI-Rz01 reduced disease incidence to 44.67%, compared with 80.00% in the control, and suppressed the pathogen population to 3.33 × 10⁵ CFU/g soil. Rhizobacterial application also improved red chili pepper growth. These findings indicate that local rhizobacteria have strong potential as environmentally friendly biological control agents for sustainable red chili pepper cultivation.
The Effect of Soaking Red Chili Seeds (Capsicum annum L.) with Various Trichoderma Species in Suppressing Chili Seed-Borne Pathogens Caused by Colletotrichum Rani Selpia Siregar; Dini Puspita Yanty; Jumaria Nasution
Agricultural Revolution Journal Vol. 1 No. 2 (2025): Agricultural Revolution Journal
Publisher : CIB Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.64570/agrivolution.v1i2.38

Abstract

Red chili (Capsicum annuum L.) is a horticultural plant that belongs to the Solanaceae family. Chili cultivation often encounters problems, namely anthracnose disease caused by the fungus Colletotrichum. This study aims to determine the most effective Trichoderma species for suppressing red chili seed-borne Colletotrichum pathogens. This study was conducted from March to April 2025. This research method used a Completely Randomized Design (CRD) with 5 treatments and 3 replications. P0 = Control (Without soaking with Trichoderma suspension) P1 = Red chili seeds soaked with Trichoderma harzianum suspension for 9 hours P2 = Red chili seeds soaked with Trichoderma viride suspension for 9 hours P3 = Red chili seeds soaked with Trichoderma asperellum suspension for 9 hours P4 = Red chili seeds soaked with fungicide for 5 minutes. The parameters observed were: Germination percentage (%), seedling height (cm), and number of leaves (stalks). Trichoderma treatment significantly affected germination percentage, red chili seedling height, and leaf number. In terms of treatment percentage, P1, P2, and P3 were significantly different in red chili seed germination percentage, but the three treatments were not significantly different from P0 and P4. Soaking local chili seeds with various Trichoderma suspensions was best found in the types of Trichoderma viride and Trichoderma asperellum because it can be seen from the value of the results of the percentage of germination power, the average height of seedlings, and the number of leaves, the values ​​​​of Trichoderma viride and Trichoderma asperellum were the highest.
Co-Authors Aslan Sari Thesiwati Denny Akbar Tanjung Elli Afrida Jumaria Nasution Magdalena Saragih Pajri Ananta Yudha Poppy Khairunnisa Rahil Ade Rifqah Rani Selpia Siregar Riduan Sembiring Saipul Sihotang Selviana Anggraini Sumini Sumini Swati Sembiring