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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology
Nguyen, Phong V.
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Veterinary

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PLANT REGENERATION THROUGH PROTOCORM-LIKE BODIES DERIVED FROM STEM THIN LAYER OF Anubias barteri var. Nana Petite Le, Giang K. T.; Nguyen, Tinh V.; Tran, Ngan K. T; Dang, Vy T. H.; Nguyen, Phong V.
BIOTROPIA Vol. 31 No. 3 (2024): BIOTROPIA Vol. 31 No. 3 December 2024
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2024.31.3.2214

Abstract

Article Highlights- Effective induction of PLBs from stem thin layer and shoot regeneration using specific BAP and auxin combinations.- Significant role of potato extract in enhancing shoot regeneration.- Highest shoot regeneration rate achieved with 3 mg/L BAP concentration. AbstractAnubias barteri var. nana Petite, a highly valued ornamental aquatic plant in the Araceae family, faces challenges in vegetative propagation due to its slow multiplication rate. This study established a robust micropropagation protocol for rapid and efficient multiplication of A. barteri var. nana Petite. Explants were subjected to thorough sterilization, and shoot induction and multiplication were optimized using varying concentrations of Benzyl adenine (BA) on Murashige and Skoog (MS) medium. Protocorm-like bodies (PLBs) were induced from transverse thin-layer explants using combinations of BAP and Naphthaleneacetic acid (NAA). PLB multiplication and shoot regeneration were achieved through a sequential culture protocol. In addition, the influence of potato extract on shoot regeneration and the role of Indole-3-butyric Acid (IBA) in root development were explored. This study demonstrated a 100% survival rate of regenerated shoots in aquariums. Ongoing research is focused on further enhancing PLB multiplication. This optimized micropropagation protocol holds promise for the large-scale production of A. barteri var. nana Petite, addressing the limitations of natural propagation.
ENHANCEMENT OF TOMATO GROWTH AND BIOCONTROL OF FUSARIUM SOLANI ROOT ROT DISEASE BY STREPTOMYCES ROCHEI BT02 Nguyen, Phong V.; Nguyễn , Hảo Vĩnh Lưu; Lê, Đạm T.; Nguyễn, Hạnh H. T.
BIOTROPIA Vol. 31 No. 1 (2024): BIOTROPIA Vol. 31 No. 1 April 2024
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2024.31.1.2159

Abstract

This study investigated the dual role of Streptomyces rochei BT02 in promoting tomato growth and suppressing Fusarium solani, the causative agent of tomato root rot disease. Various assays were conducted to evaluate the plant growth-promoting attributes of strain BT02 including indole-3-acetic acid (IAA) biosynthesis, phosphate solubilization, biofilm formation, and siderophore production. Under in vitro conditions, strain BT02 exhibited plant growth-promoting characteristics such as cellulose degradation, phosphate solubilization, IAA synthesis, biofilm formation, and siderophore production. Application of strain BT02 significantly improved tomato seed germination (26.7%), with enhanced sprout and radicle lengths and seed vigor (38.6%). Greenhouse experiments revealed substantial increases in plant height, leaf and branch numbers, inflorescence, and flower number, emphasizing the positive impact of strain BT02 on overall plant growth. The BT02 strain demonstrated antagonistic efficacy of 45.3 to 58.9% against Fusarium solani, as evidenced by the dual culture and agar well diffusion methods. Under greenhouse conditions, strain BT02 significantly reduced disease incidence and demonstrated control efficacy of 41.6% against Fusarium solani, highlighting its biocontrol potential. This study provides insights into the mechanisms employed by Streptomyces rochei BT02 to enhance plant growth and suppress root rot disease, paving the way for its application as a biocontrol agent in sustainable agriculture.
Co-Authors Dang, Vy T. H. Le, Giang K. T. Lê, Đạm T. Nguyễn , Hảo Vĩnh Lưu Nguyễn, Hạnh H. T. Nguyen, Tinh V. Tran, Ngan K. T