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Apocynum

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Changyan Tian – 1st expert on this subject based on the ideXlab platform

  • lithium biofortification of medicinal tea Apocynum venetum
    Scientific Reports, 2019
    Co-Authors: Li Jiang, Lei Wang, Mohsin Tanveer, Changyan Tian

    Abstract:

    : Lithium (Li) could be much safer and successful approach to supply Li via Li-fortified food products. This study is highlighting the potential scope of Li supply via Li-biofortification of Luobuma tea (made from Apocynum venetum leaves), which is a very popular beverage in Asia with several medical properties. We explored the possibility of A. venetum as Li-enriched tea and investigated plant growth, Li accumulation, total flavonoids (TFs), rutin and hyperoside concentrations, and the antioxidant capacity of A. venetum. With the increase of additional Li, Li concentration in roots, stems and leaves increased gradually. Compared with the control treatment, 10-15 mg kg-1 Li addition stimulated the growth of A. venetum and 25 mg kg-1 Li addition significantly increased the Li concentration in leaves by 80 mg kg-1. Li application did not decrease TFs, rutin, hyperoside and antioxidant capacity of this medicinal herb. A daily consumption of 10 g Li-biofortified A. venetum leaves (cultivated with 25 mg kg-1 LiCl) can give 592 μg Li intake and would constitute 59% of the provisional recommended dietary daily intake of Li. Our results showed that Li-biofortified A. venetum leaves can be used as Li-fortified tea to enhance Li supply and to improve human health when it was used as daily drink.

  • subcellular distribution and chemical forms of lithium in li accumulator Apocynum venetum
    Plant Physiology and Biochemistry, 2018
    Co-Authors: Litao Qiao, Mohsin Tanveer, Lei Wang, Changyan Tian

    Abstract:

    Abstract Apocynum venetum is a promising species to remediate an emerging environmental contaminant lithium (Li). However, no research has been conducted so far relating Li tolerance mechanism. In order to improve the understanding of Li transportation and detoxification, subcellular accumulation and distribution of different chemical forms of Li was studied in Apocynum venetum. Subcellular Li compartmentalization analysis showed that majority of Li was located in vacuole (45.52–72.65%) and cell wall (14.84–29.02%) under Li treatment. Furthermore, water soluble and ethonal extracted Li (inorganic Li) are the main chemical forms of Li taken up by A. venetum. With the increase of Li concentration in the medium, Li content in all subcellular fractions and proportion of F-ethanol form with high mobility increased. The greatest amount of Li was found in soluble fraction in leaves at 25 mg L−1 Li treatment, followed by soluble fraction in leaves at 2.5 mg L−1. These results suggest that Li compartmentation in leaf vacuoles is important in Li detoxification and Li accumulation of A. venetum.

  • tolerance and accumulation of lithium in Apocynum pictum schrenk
    PeerJ, 2018
    Co-Authors: Li Jiang, Lei Wang, Lei Zhang, Changyan Tian

    Abstract:

    : Primarily, lithium (Li) resource development and wider application of Li-ion batteries result in Li pollution and concomitantly poses increasing and inevitable problems to environmental health and safety. However, information is rare about the scope of the remediation of Li contaminated soil. Apocynum venetum is already proved to be a Li-accumulator with high Li tolerance and accumulation (Jiang et al., 2014). However, it is not clear whether Apocynum pictum, another species of the same genus with the same uses as A. venetum, is also a Li-accumulator. We investigated germination, growth and physiological responses of A. pictum to different levels of LiCl. Germination was not significantly affected by low Li concentration (0-100 mmol L-1). As LiCl increased from 100 to 400 mmol L-1, both germination percentage and index decreased gradually. For germination of A. pictum seeds, the critical value (when germination percentage is 50%) in LiCl solution was 235 mmol L-1, and the limit value (when germination percentage is 0%) was 406 mmol L-1. A. pictum could accumulate >1,800 mg kg-1 Li in leaves, and still survived under 400 mg kg-1 Li supply. The high Li tolerance of A. pictum during germination and growth stage was also reflected by activity of α-amylase and contents of soluble sugar, proline and photosynthetic pigments under different Li treatments. The bioconcentration factors (BCF) (except control) and translocation factors (TF) were higher than 1.0. High tolerance and accumulation of Li indicated that A. pictum is Li-accumulator. Therefore, this species could be useful for revegetation and phytoremediation of Li contaminated soil.

Jianjun Hu – 2nd expert on this subject based on the ideXlab platform

  • botany traditional uses phytochemistry and pharmacology of Apocynum venetum l luobuma a review
    Journal of Ethnopharmacology, 2012
    Co-Authors: Xiaoying Zhang, Tian Wang, Jianjun Hu

    Abstract:

    Abstract Ethnopharmacological relevance Apocynum venetum L. (Apocynaceae, Luobuma ) has a long history as a Chinese traditional medicine with uses to calm the liver, soothe the nerves, dissipate heat, and promote diuresis. Recently, Luobuma tea has been commercialized as a sedative and anti-aging supplement that has become increasingly popular in North American and East Asian health food markets. Aims of the review The aim of this review is to provide an up-to-date and comprehensive overview of the botany, chemical constituents, traditional uses, pharmacological activities and safety aspects of Apocynum venetum in order to assess its ethnopharmacological use and to explore its therapeutic potentials and future opportunities for research. Background and methods The accessible literature on Apocynum venetum written in English, Chinese and Japanese were collected and analyzed. The literatures included ancient Chinese herbal classics, pharmacopoeias and articles that included in Pubmed, Web of Science, Google Scholar and Wanfang. Key findings Modern pharmacological studies demonstrated that Apocynum venetum possess wide pharmacological activities that include antihypertensive, cardiotonic, hepatoprotective, antioxidant, lipid-lowering, antidepressant and anxiolytic effects, which can be explained by the presence of various flavonoid compounds in this plant. The traditional (Lop Nor region) use of Apocynum venetum with tobacco as an agent to detoxify nicotine may receive interest as a possible therapeutic option to detoxify the body from smoking. Based on animal studies and clinical trials, Apocynum venetum causes no severe side effects, even in a stable daily dosage (50 mg/person/day) for more than three years. Conclusions Apocynum venetum potentially has therapeutic potential in the prevention and treatment for the cardiovascular and neurological diseases, especially for high blood pressure, high cholesterol, neurasthenia, depression and anxiety. Further investigations are needed to explore individual bioactive compounds responsible for these in vitro and in vivo pharmacological effects and the mode of actions. Further safety assessments and clinical trials should be performed before it can be integrated into medicinal practices.

Yuanming Zhang – 3rd expert on this subject based on the ideXlab platform

  • comparative study of composition structure and properties of Apocynum venetum fibers under different pretreatments
    Carbohydrate Polymers, 2007
    Co-Authors: Leilei Wang, Yuanming Zhang

    Abstract:

    In this paper, the chemical degumming methods, briefly, peeled bast by hand (Fiber-H) and by machine (Fiber-M), as well as the bacterial degumming method (Fiber-B), were used to obtain the Apocynum venetumfibers and the fibers separately obtained by above-mentioned methods as well as the Bast of the Apocynum venetum had been characterized by the Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and mechanical property measurement. It was found that the Bast showed the structure of cellulose I and the cellulose I structure was well preserved in all treated A. venetum fibers according to the FTIR and XRD results. Meanwhile, as seen from the SEM images, the treated fibers can be directly suitable for textile industry, which was further confirmed by the mechanical property measurements. It is interesting to note that the crystallinity, the degree of orientation and the mechanical properties of Fiber-B only have slight differences with those of Fiber-H and Fiber-M. These results suggested that the bacterial degumming method had more industrial applications due to its high efficiency, low cost and especially environmentally-benign nature than the chemical degumming methods.