Article Per Year (5 Year)
p-Index From 2021 - 2026
0.61
P-Index
This Author published in this journals
All Journal Caraka Tani: Journal of Sustainable Agriculture
Ani Widiastuti
Department of Plant Protection, Faculty of Agriculture, Universitas Gadjah Mada, Yogyakarta
Agriculture, Biological Sciences & Forestry

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
Hormesis in Pathogenic and Biocontrol Fungi: From Inhibition to Stimulation Krisnanda Surya Dharma; Suryanti Suryanti; Ani Widiastuti
Caraka Tani: Journal of Sustainable Agriculture Vol 39, No 2 (2024): October
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/carakatani.v39i2.83012

Abstract

Hormesis, a biphasic response where low doses of stressors stimulate growth and high doses inhibit it, has significant implications for agricultural chemical use. This review explores the impact of low-dose fungicides or pesticides on pathogenic and biocontrol fungi. This study highlights how sublethal dose exposure can enhance growth and virulence of fungal pathogens, while also potentially increasing their stress tolerance at higher doses. This phenomenon complicates fungicide resistance management strategies. The review focuses on specific fungicides such as dimethachlone, prochloraz, carbendazim, and others, and their hormetic effects on fungal pathogens. Furthermore, the effects of low-dose pesticides and fungicides on beneficial fungi like entomopathogenic and arbuscular mycorrhizal fungi (AMF) are discussed. Here, low-dose exposure can stimulate the germination of entomopathogenic fungal conidia and enhance AMF root colonization and phosphorus uptake. However, hormesis can have trade-offs, potentially leading to unforeseen consequences for the organism. A thorough understanding of hormesis and dose-dependent fungicide effects is crucial for optimizing disease management and agricultural practices. This knowledge can inform strategies to minimize pathogen resistance and promote sustainable approaches. Implementing integrated disease management that combines fungicides with different modes of action alongside other control methods can be effective. Careful consideration of fungicide doses and potential hormesis effects is paramount for ensuring sustainable plant disease control and food security.
Tomato Mutants SlIAA9 Exhibit Thermo-Morphophysiological Characters and Enhanced SIDREBA4 Gene Expression Cory Rafsyanyani; Titah Rigel Anjalani; Anisa Esti Rahayu; Syariful Mubarok; Ani Widiastuti; Deden Derajat Matra; Hiroshi Ezura; Nurul Jadid
Caraka Tani: Journal of Sustainable Agriculture Vol 41, No 1 (2026): January
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/carakatani.v41i1.108173

Abstract

Rising temperatures associated with climate change threaten tomato productivity, yet the contribution of auxin signaling components to heat-stress adaptation remains incompletely understood. The IAA9 gene, encoding an Aux/IAA transcriptional repressor, is well known for its role in auxin-regulated development, but its role in heat responses is still unclear. This study aims to elucidate the function of IAA9 in modulating tomato responses under heat stress conditions. Researchers utilized tomato iaa9-3 and iaa9-5 mutants and exposed them to prolonged elevated temperatures of 40 to 45 °C for 6 weeks to assess morphophysiological traits, and to 38 to 40 °C for 6 days to evaluate molecular responses through SlDREBA4 gene expression analysis. Under prolonged heat stress, all genotypes exhibited reduced leaf area, leaf number, and total chlorophyll content, accompanied by increased plant height compared to plants grown under normal conditions. Specifically, wild-type Micro-Tom (WT-MT) showed the lowest values in leaf area (165.89 cm²), leaf number (23 leaves), and total chlorophyll content (115.7 µg g-1). In contrast, the iaa9-3 and iaa9-5 mutants recorded the highest plant heights at 11.98 and 12.13 cm, respectively, indicating a differential growth response under stress. Gene expression analysis revealed that SlDREBA4 expression was upregulated in both iaa9-3 and iaa9-5 mutants compared to normal temperature conditions, with increases of 0.45-fold and 1.78-fold, respectively. These results indicate that IAA9 mutations confer enhanced thermotolerance in tomato, as reflected by altered morphology and increased heat-responsive gene expression. This study highlights IAA9 as a potential genetic target for improving heat stress resilience in tomato breeding programs.
Identification of Pathogens Causing Important Diseases in Leatherleaf Fern (Rumohra adiantiformis) and In Vitro Inhibition using Bacillus velezensis B-27 Barokati Tsaniyah; Tri Joko; Ani Widiastuti
Caraka Tani: Journal of Sustainable Agriculture Vol 39, No 2 (2024): October
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/carakatani.v39i2.83675

Abstract

Leatherleaf fern (Rumohra adiantiformis) is a famous ornamental-leaf plant that has been used by florist entrepreneurs around the world. It is one of the leading export commodities in Indonesia, however, currently, there are some diseases of this leaf reported in the field causing yield loss and reducing the economic value. This study aimed to identify the pathogens causing the recent 3 significant diseases of leatherleaf fern, including leaf blight, leaf tip rot, and post-harvest leaf rot, and in vitro analysis of beneficial bacteria, Bacillus velezensis B-27, against the pathogens. The methods used in this study were isolation, pathogenicity test, morphological observation, molecular identification of pathogens, and poisoned food technique of B. velezensis against those pathogens compared to fungicides and bactericides. The results of molecular identification showed that Neopestalotiopsis sp. and Pantoea ananatis caused leaf blight, Fusarium oxysporum f. sp. sesami triggered leaf tip rot, while Calonectria sp. and P. ananatis contributed to post-harvest leaf rot. Based on in vitro analysis, B. velezensis B-27 reduced the growth of the Neopestalotiopsis sp. DM C with the highest inhibition of 95.6%, Neopestalotiopsis sp. DM B with 84.3%, F. oxysporum f. sp. sesami with 61.9%, Calonectria sp. with 93.4%, and inhibited the growth of P. ananatis by producing a clear zone. This research concludes that B. velezensis B-27 has the potential as a biocontrol against pathogens causing significant diseases in leatherleaf ferns due to its ability to inhibit pathogens and its advantage as a beneficial microbe that is environmentally friendly to support sustainable agriculture.
Co-Authors Anisa Esti Rahayu Barokati Tsaniyah Cory Rafsyanyani Deden Derajat Matra Hiroshi Ezura Krisnanda Surya Dharma Nurul Jadid Suryanti Suryanti Syariful Mubarok Titah Rigel Anjalani Tri Joko