Article
Plant Sciences
Ankita Lal, Manu Pant, Gaurav Pant, L. M. S. Palni, Anil Kumar, Gaurav Kumar
Summary: The aim of this study was to analyze the genetic variability of two endemic orchids in Uttarakhand, India. The results showed that the genetic diversity of these orchids was related to geographical latitude, elevation, and host tree association. The findings have important implications for conservation and breeding of these orchids.
SOUTH AFRICAN JOURNAL OF BOTANY
(2023)
Article
Plant Sciences
Ankita Lal, Manu Pant, Anil Kumar, Lok Man Singh Palni, Arundhati Singh, Masoom Raza Siddiqui, Azamal Husen
Summary: The study focuses on developing an efficient method for in vitro propocorm-based plant production and ex vitro establishment of Aerides multiflora and Rhynchostylis retusa orchids. Through tissue culture technology, the mass production of these orchids can be achieved. The optimized medium composition and environmental conditions have led to improved germination, multiplication, and plantlet survival rates, providing a viable approach for conservation and cultivation of these important orchids.
SOUTH AFRICAN JOURNAL OF BOTANY
(2023)
Article
Plant Sciences
Yinkai Xi, Biao Zeng, Hengyu Huang
Summary: The research established an efficient regeneration system for Rhynchostylis retusa, determining optimal media for each stage of callus proliferation, protocorm occurrence and growth, rejuvenation, and rooting. This provides a technical foundation for protecting wild resources and promoting artificial cultivation.
PHYTON-INTERNATIONAL JOURNAL OF EXPERIMENTAL BOTANY
(2021)
Article
Horticulture
Bal Kumari Oliya, Krishna Chand, Laxmi Sen Thakuri, Manju Kanu Baniya, Anil Kumar Sah, Bijaya Pant
Summary: This study successfully developed a protocol for mass propagation of Rhynchostylis retusa and demonstrated the genetic stability of the micropropagated plants through culture process and genetic stability analysis. The research here indicates the applicability of tissue culture for true-to-type plant production and conservation of Rhynchostylis retusa.
SCIENTIA HORTICULTURAE
(2021)
Article
Biochemistry & Molecular Biology
Mohammad Al -Amin, Siti Sarah Fazalul Rahiman, Chowdhury Faiz Hossain, Melati Khairuddean, Salizawati Muhamad Salhimi
Summary: This study isolated bioactive compounds from R. retusa that showed inhibitory effects on cancer cells and macrophages, confirming the traditional medicinal uses of R. retusa. Gigantol was identified as a bioactive compound that may contribute to the medicinal properties of R. retusa.
BIOCHEMICAL SYSTEMATICS AND ECOLOGY
(2023)
Article
Plant Sciences
May Thazin Thant, Boonchoo Sritularak, Nutputsorn Chatsumpun, Wanwimon Mekboonsonglarp, Yanyong Punpreuk, Kittisak Likhitwitayawuid
Summary: A phytochemical study on Aerides multiflora identified three new biphenanthrene derivatives and a new natural phenylpropanoid ester, along with six known compounds. Aerimultin C exhibited the most potent activity as an alpha-glucosidase inhibitor. The other compounds showed stronger activity than the positive control acarbose, indicating the potential medicinal value of Aerides multiflora.
Article
Microbiology
Archana Yadav, Jyoti Lakshmi Hati Boruah, Sachin Rameshrao Geed, Rabin K. Sharma, Ratul Saikia
Summary: This study evaluated the diversity of diazotrophic bacteria in orchid Rhynchostylis retusa (L.) Blume and their potential for promoting plant growth. A total of 183 nitrogen-fixing bacteria were screened for various plant growth-promoting traits, including phosphate solubilization, IAA production, siderophore production, HCN production, biofilm formation, and ammonia production. The selected isolates included Achromobacter, Arthrobacter, Acinetobacter, Bacillus, Brevibacterium, Curtobacterium, Erwinia, Kosakonia, Lysinibacillus, Klebsiella, Microbacterium, Mixta, Pantoea, Pseudomonas, and Stenotrophomonas, which showed positive results for PGP traits. Among the screened isolates, Pantoea, Brevibacterium, Achromobacter, Arthrobacter, Klebsiella, Mixta, Bacillus, and Pseudomonas exhibited the most pronounced PGP characteristics and acetylene reduction. BOX PCR fingerprinting analysis revealed variation in polymorphic banding patterns among the diazotrophic strains. The presence of the nifH gene and the 37 kDa nitrogenase reductase enzyme band in Western blot indicated the presence of nitrogenase activity. This study demonstrated that the interaction between orchid R. retusa and diazotrophic bacteria helps the plant fix nitrogen, acquire essential nutrients, and control pathogen entry. To the best of our knowledge, this is the first report on the characterization of the diazotrophic bacterial community from the aerial roots of R. retusa.
ARCHIVES OF MICROBIOLOGY
(2023)
Article
Horticulture
Sudarat Kasemcholathan, Akira Kanno, Anupan Kongbangkerd, Pattamon Sangin
Summary: The study identified four B-class DEF-like MADS-box genes and two E-class AGL6-like MADS-box genes in Rhynchostylis retusa, with their expression patterns supporting the hypothesis of sepal/petal/lip determination in floral organ formation. The RrDEF and RrAGL6 genes contribute to the regulation of orchid floral development by promoting different aspects of perianth formation.
HORTICULTURE ENVIRONMENT AND BIOTECHNOLOGY
(2021)
Article
Plant Sciences
Binbin Wen, Xingyao Gong, Wenpeng Deng, Xiude Chen, Dongmei Li, Xiling Fu, Ling Li, Qiuping Tan
Summary: The study identifies MdHHO3 as a member of the GARP gene family in apples, which is up-regulated under nitrogen supply. MdHHO3 can bind to its own promoter sequence and inhibit its activity, as well as regulate the expression of nitrate-related genes. Overexpression of MdHHO3 in Arabidopsis and tobacco plants under nitrate deficiency leads to early leaf senescence.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Environmental Sciences
Hongyan Shen, Yingying Liu, Yinan Liu, Zemeng Duan, Pengpeng Wu, Zhifen Lin, Haoyu Sun
Summary: This study investigates the effects of silver antibacterial compounds and quorum sensing inhibitors on bacterial resistance by measuring the mutation and conjugative transfer frequency in Escherichia coli. The results show hormetic dose-responses and antagonistic interactions between SACs and QSIs on bacterial resistance, with toxicity playing a key role in promoting resistance.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Jiang Zhu, Tao Tang, Chun-Yan Hu, Wen-Cai Xiang, Zhi-Qiang Chen, Liu Luo, He-Shan Yang, Hong-Pan Liu
Summary: The use of CNCs with AgNPs for various applications is common, and utilizing microwave-assisted generation of AgNPs on the CNC surface has been found to be useful in reducing synthesis cost and environmental pollution. The microwave method offers advantages of simplicity, speed, and high efficiency. This study demonstrates that the use of a green microwave-based method can rapidly synthesize AgNPs, showing good antibacterial properties with trace amounts of AgNO3.
Article
Chemistry, Multidisciplinary
Kotryna Cekuolyte, Renata Gudiukaite, Vaidas Klimkevicius, Veronika Mazrimaite, Andrius Maneikis, Egle Lastauskiene
Summary: This study focuses on the biosynthesis of silver nanoparticles using the cell-free secretomes of four Geobacillus bacterial strains, and the synthesized nanoparticles were characterized using various techniques.
Article
Engineering, Environmental
Chih-Wei Fu, Jiun-Lin Horng, Sok-Keng Tong, Bor-Wei Cherng, Bo-Kai Liao, Li-Yih Lin, Ming-Yi Chou
Summary: Silver exposure has been shown to negatively impact the neural and behavioral functions of fish, resulting in reduced physical fitness and impaired social, learning, and memory behaviors. This indicates neurotoxicity in adult zebrafish after exposure to sublethal levels of AgNO3 for 72 hours.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Horticulture
Essam Elatafi, Jinggui Fang
Summary: This study evaluated the effects of silver nitrate (AgNO3) and nano-silver (Ag-NPs) on the physiological and biochemical characteristics, and quality of grape bunches during cold storage. The results showed that both AgNO3 and Ag-NPs improved the longevity and quality of the fruits. Immersion in Ag-NPs was found to be the best application for maintaining overall storage quality for both grape varieties.
Article
Multidisciplinary Sciences
Kerem Ilaslan, Fatih Tornuk
Summary: In this study, organomodified montmorillonite and halloysite nanoclays were used to enhance intercalation characteristics, and Ag+ ions were doped to enhance antimicrobial properties. Various analyses showed that the interlayer space of the nanoclays increased and Ag+ ions successfully doped into the nanoclay structure. Additionally, MMT-type nanoclay samples released more Ag+ ions compared to halloysite-type nanoclay samples. The results demonstrated that intercalated and Ag+-doped nanoclays effectively inhibited bacterial growth.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)