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All Journal AGRISAINTIFIKA Jurnal Ilmu-ilmu Pertanian Jurnal Biologi Tropis
Rina Puji Lestari
Politeknik LPP Yogyakarta
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Materials Science & Nanotechnology

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GROWTH RESPONSE AND DROUGHT TOLERANCE OF THREE ECHINACEA PURPUREA ACCESSIONS AT DIFFERENT WATERING INTERVALS Rina Puji Lestari; Ahmad Yunus; Samanhudi
Agrisaintifika: Jurnal Ilmu-Ilmu Pertanian Vol. 10 No. 2 (2026): Agrisaintifika
Publisher : Universitas Veteran Bangun Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32585/ags.v10i2.8144

Abstract

Drought is widely recognized as one of the most critical environmental constraints limiting plant growth and development, particularly in medicinal species such as Echinacea purpurea. This research was conducted to assess the growth performance and drought tolerance of three E. purpurea accessions exposed to different watering regimes. The study employed a completely randomized design arranged factorially, consisting of two experimental factors, namely accession (three accessions) and watering interval (1, 3, 5, and 7 days), with each treatment replicated five times. Statistical analysis was performed using analysis of variance (ANOVA), and significant differences among treatments were further evaluated using Duncan’s Multiple Range Test (DMRT) at the 5% probability level. The findings revealed that watering interval had a significant influence on plant growth, while the effect of accession was less pronounced for most observed variables. Daily watering resulted in superior growth performance, as reflected by greater plant height and a higher number of leaves. In contrast, extending the watering interval led to a marked reduction in growth. Among the evaluated accessions, accession 3 consistently exhibited better adaptation under limited water availability. Furthermore, differences in root-to-shoot ratio under drought conditions suggest the occurrence of adaptive mechanisms that enable plants to cope with water deficit stress. Overall, the results indicate that watering interval plays a more decisive role than accession in determining the growth of E. purpurea, whereas accession 3 possesses the greatest potential for drought tolerance. Keywords: drought stress, Echinacea purpurea, growth, drought tolerance
Physiological Response of Mentik Wangi Rice (Oryza sativa L.) to Zinc oxide Nanoparticles Under Drought Stress Abdul Zaki; Yovi Avianto; Henra Henra; Rina Puji Lestari
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i3.11910

Abstract

Mentik wangi rice (Oryza sativa L.) is a local aromatic Indonesian variety known for its superior grain quality but susceptible to drought Stress. 2Zinc Oxide Nanoparticles (ZnO-NPs) have been widely investigated as nano-fertilizers to improve plant physiological performance under abiotic stress; however, information regarding their effects on the local aromatic rice cultivar Mentik Wangi remains limited. This study aimed to evaluate the physiological responses of Mentik Wangi rice to ZnO-NPs application under drought stress and to identify the most effective ZnO-NPs concentration for each physiological parameter. The experiment was arranged in a factorial Completely Randomized Design with two water regimes (50% and 100% field capacity) and six ZnO-NPs concentrations (0, 0.75, 1.50, 2.25, 3.00, and 3.75 ppm). Data were analyzed using two-way analysis of variance followed by Duncan's Multiple Range Test at the 5% significance level. Under drought stress, ZnO-NPs at 2.25 ppm produced the highest photosynthetic rate (0.79 µmol CO₂ m⁻² s⁻¹) and improved membrane stability index, whereas 1.50 ppm resulted in the lowest transpiration rate (0.016 mmol H₂O m⁻² s⁻¹) and the highest proline accumulation. Chlorophyll content also increased under normal conditions following the application of 2.25 ppm ZnO-NPs. In contrast, ZnO-NPs did not significantly affect ascorbic acid content or relative water content. These findings indicate that the physiological response of Mentik Wangi rice to ZnO-NPs depends on the parameter evaluated, with 2.25 ppm and 1.50 ppm producing the most favorable responses for different physiological traits under the conditions of this study.
Growth and Productivity of Sugarcane on Inceptisol and Vertisol Soils Rina Puji Lestari; Agus Eka Alazis; Anna Kusumawati
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i3.12129

Abstract

Sugarcane (Saccharum officinarum L.) productivity is strongly influenced by soil characteristics that affect plant growth and yield. This study aimed to compare the growth and productivity of sugarcane cultivated on Inceptisol and Vertisol soils and to identify growth parameters associated with productivity. The research was conducted from April to September 2019 in commercial sugarcane plantations located in Magelang Regency, Central Java (Inceptisol) and Kulon Progo Regency, Yogyakarta Special Region, Indonesia (Vertisol). A field survey was carried out using 54 sampling units consisting of Bululawang (BL) sugarcane cultivated under a fifth-ratoon production system and harvested at 12 months of age. Growth parameters observed included plant height, stem diameter, fresh stem weight, and productivity, while soil analyses included pH, available nitrogen, and soil moisture content. Data were analyzed using correlation analysis and independent sample t-tests at a 5% significance level after testing for normality (Shapiro–Wilk) and homogeneity of variance (Levene’s test). The results showed no significant differences in growth and productivity between sugarcane grown on Inceptisol and Vertisol soils. Soil pH and moisture content differed significantly between the two soil types, whereas available nitrogen content did not. Fresh stem weight exhibited the strongest association with productivity (r = 0.999), followed by stem diameter (r = 0.410). However, this relationship should be interpreted cautiously because sugarcane productivity is closely related to biomass accumulation and correlation does not imply causation. The findings indicate that fresh stem weight is the growth parameter most closely associated with sugarcane productivity. Improving soil fertility and implementing appropriate soil management practices are recommended to optimize sugarcane production in tropical environments.
Co-Authors Abdul Zaki Agus Eka Alazis Ahmad Yunus Anna Kusumawati Henra Henra Samanhudi Yovi Avianto