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Polygonum

About: Polygonum is a research topic. Over the lifetime, 1230 publications have been published within this topic receiving 12765 citations.


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Journal ArticleDOI
TL;DR: F Fourier transform infrared (FT-IR) spectroscopic analysis of bioactive accumulation in P. multiflorum enabled discrimination between hairy root and adventitious root cultures, and it is evident from this study that HRCs could be an attractive proposition for large-scale production of root biomass and secondary metabolites in bioreactors.
Abstract: Hairy root cultures (HRCs) are characterized by fast and unlimited root growth, and they have greater genetic stability than other cultivation methods. HRCs are known to accumulate phytochemical levels comparable to those of intact plant. In this study, HRCs of Polygonum multiflorum were established from leaf explants infected with Agrobacterium rhizogenes strain KCCM 11879. Over 60% of the explants showed hairy root induction after 21 days of cultivation on hormone-free MS (Murashige and Skoog Physiol Plant 15:473–479, 1962) medium; induced roots were confirmed by PCR using a rolC-specific primer. Of the six lines of HRCs selected for further analysis, line HR-01 performed best, producing a root biomass (105.2 g L−1 of FW, 9.7 g L−1 of DW), which is 10-fold higher than that of non-transgenic roots. The HR-01 line also showed a significant increase in its total phenolic content (26.64 mg g−1 DW), while non-transgenic roots accumulated 8.36 mg g−1 DW of total phenolic. The levels of phenolic compounds in the HRCs increased more than 2.5-fold following exposure to 50 μM methyl jasmonate for 5 days. Fourier transform infrared (FT-IR) spectroscopic analysis of bioactive accumulation in P. multiflorum enabled discrimination between hairy root and adventitious root cultures. Thus, it is evident from this study that HRCs could be an attractive proposition for large-scale production of root biomass and secondary metabolites of P. multiflorum in bioreactors.

14 citations

Journal ArticleDOI
TL;DR: The results indicate that functioning plastids may be essential for polygodial production and cavities for its accumulation, and that functioningplastid-like compounds were absent in the closely related species Polygonum persicaria L. hydropiper.
Abstract: Shoots of Polygonum hydropiper L. (waterpepper), especially in the leaves and flower-heads, contain significant amounts of the sesquiterpenoid polygodial, a compound with a potential use as a natural pesticide. The polygodial content of the tepals is particularly high: up to 8.5% of the dry weight. Roots and seeds do not contain detectable amounts of polygodial. Polygodial containing organs e.g. leaves and tepals, were found to contain cavities. Fourier transform infra-red (FTIR) microspectroscopy demonstrated that polygodial or its congeners are found in these cavities but not in other tissues or cells. Comparable cavities containing polygodial-like compounds were absent in the closely related species Polygonum persicaria L. Callus cultures and cell suspensions as well as root- and shoot cultures were initiated from mature P. hydropiper plants. Polygodial could be detected only in shoot cultures. Our results indicate that functioning plastids may be essential for polygodial production and cavities for its accumulation.

14 citations

Journal ArticleDOI
TL;DR: Neither of the sulfonylurea herbicides controlled prostrate spurge or woolly croton as effectively as 2,4-D.
Abstract: In field experiments, chlorsulfuron and CGA 131036 did not injure winter wheat. Both herbicides applied postemergence at 9 and 10 g ai/ha completely controlled flixweed. CGA 131036 controlled cutleaf eveningpnnmrose 81%, and chlorsulfuron controlled 91%. At similar rates, CGA 131036 was also less effective than chlorsulfuron on henbit and Italian ryegrass. Both controlled wild buckwheat 77% when applied postemergence at 18 g/ha. Neither of the sulfonylurea herbicides controlled prostrate spurge or woolly croton as effectively as 2,4-D. In a bean root bioassay, root growth inhibition by both herbicides was partially alleviated by adding isoleucine and valine. Nomenclature: Chlorsulfuron, 2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl) amino]carbonyl]benzenesulfonamide; CGA 131036, N-(6-methoxy-4-methyl-1,3,5-triazin-2-yl-aminocarbonyl)2-(2-chloroethoxy)-benzenesulfonamide; 2,4-D, (2,4-dichlorophenoxy)acetic acid; bean, Phaseolus vulgaris L.; winter wheat, Triticum aestivum L.; flixweed, Descurainia sophia (L.)Webb. ex Prantl #3 DESSO; cutleaf eveningprimrose, Oenothera laciniata Hill # OEOLA; henbit, Lamium amplexicaule L. # LAMAM; wild buckwheat, Polygonum convolvulus L. # POLCO; Italian ryegrass, Lolium multiflorum Lam. # LOLMU; woolly croton, Croton capitatus Michx. # CVNCP; prostrate spurge, Euphorbia humistrata Engelm. ex Gray # EPHHT. Additional index words: Phaseolus vulgaris, Descurainia sophia, Oenothera laciniata, Lamium amplexicaule, Polygonum convolvulus, Lolium multiflorum, Croton capitatus, Euphorbia humistrata, bioassay, LAMAM, DESSO, OEOLA, POLCO, LOLMU, CVNCP, EPHHT.

14 citations

Journal ArticleDOI
TL;DR: Five endophytes were found to have the greatest potential as inoculants to assist P. hydropiper in future P-phytoextraction studies.

14 citations

Journal ArticleDOI
TL;DR: Fresh leaf, stem and root extracts of Polygonum hydropiper L. (Polygonaceae) were tested separately for toxicity to fingerlings of grass carp and only the leaf was found to be toxic, but shoots including both stems and leaves were more convenient to use because of the small size of the leaves.

14 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202333
2022109
202114
202037
201937
201856