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All Journal Agro Bali: Agricultural Journal Planta Simbiosa : Jurnal Tanaman Pangan dan Hortikultura
Rosyida Rosyida
Universitas Diponegoro
Agriculture, Biological Sciences & Forestry Immunology & microbiology

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Efek Konsentrasi Paklobutrazol dan Pemangkasan pada Petumbuhan dan Hasil Tanaman Tomat Ceri (Lycopersicum esculentum var. cerasiforme) Pelangi Dian Sakanti; Karno Karno; Rosyida Rosyida
J-Plantasimbiosa Vol 6 No 1 (2024)
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/jplantasimbiosa.v6i1.3558

Abstract

This study aimed to examine the effect of paclobutrazol concentration and side shoots pruning on the growth and yield of cherry tomato plants. This study used a factorial Complete Randomized Design (RAL) with 2 factors and 3 replicates. The first factor was the concentration of paklobutrazol consisted of 4 levels, namely 0 ppm (P0), 75 ppm (P1), 150 ppm (P2), and 225 ppm (P3). The second factor was side shoots pruning consisted of 2 levels, namely without pruning (M1) and with pruning (M2). Parameters observed include plant height, number of leaves, leaf area, chlorophyll and carotenoid content, flowering time, number of fruits, fruit weight, fruit diameter, fruit length, flesh thickness, fresh weight of plant biomass, dry weight of plant biomass, and harvest index. The data were statistically analyzed by analysis of variance (ANOVA), then continued with the 5% Honest Significant Difference (HSD).The results showed that paclobutrazol treatment had a significant effect on plant height parameters, number of leaves, leaf area, flowering time, number of fruits, fruit weight, fruit diameter, fruit length, thickness of fruit flesh, wet weight of plants, dry weight of plants, and harvest index. Pruning treatment has a noticeable effect on the parameters of plant height and number of leaves. The interaction between paklobutrazol concentration treatment and pruning is in the parameter of leaf count.
Salicylic Acid Improves Morpho-Physiological Traits and Biomass of Kale under Drought Stress Rosyida Rosyida; Arina Dinana; Karno Karno; Muhaimin Ar Rasyid; Fajrin Pramana Putra; Nur Izzatul Maulidah
Agro Bali : Agricultural Journal Vol 9, No 2 (2026)
Publisher : Universitas Panji Sakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37637/ab.v9i2.2765

Abstract

Drought stress in agricultural land disrupts the physiological processes, growth, and yield of kale (Brassica oleracea L. var. acephala). This study evaluated the physiological responses, growth, and yield of kale treated with salicylic acid, a potential strategy to enhance plant tolerance to drought stress, in a greenhouse at the Department of Agriculture, Universitas Diponegoro, Semarang. A 4 × 4 factorial experiment was arranged in a Completely Randomized Design (CRD) with three replications. The first factor was drought level (100%, 80%, 60%, and 40% field capacity). The second factor was salicylic acid (SA) concentration 0, 0.75, 1.5, and 2.25 mM). The results indicated that physiological responses (chlorophyll a, chlorophyll b, total chlorophyll, relative water content, and electrolyte leakage) remained largely stable under moderate drought stress (60% FC), whereas plant growth parameters (plant height, leaf number, and leaf area) were reduced by 14.5–20.7% compared with the control (100% FC). At 40% FC, both physiological and growth responses were more severely affected; electrolyte leakage increased markedly, and plant height, leaf area, and dry biomass weight decreased by 24.4%, 47.2%, and 60.5%, respectively, compared with the control (P < 0.05). The best treatment was the application of 1.5 mM salicylic acid, which increased the relative water content by 4.13% and decreased the electrolyte leakage by 34.70% compared to untreated plants (P < 0.05). This concentration was likely more effective due to optimal stomatal regulation, increased antioxidant enzyme activity, and maintained membrane integrity, indicating that 1.5 mM SA has potential as a biostimulant to improve kale water status and membrane stability. However, field validation across locations and seasons is needed before recommending it for dryland farming.
Co-Authors Arina Dinana Fajrin Pramana Putra K. Karno Karno Karno Muhaimin Ar Rasyid Nur Izzatul Maulidah Pelangi Dian Sakanti