Polygonum

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

The emergence and plant development of wild buckwheat (polygonum convolvulus)

Abstract: Greatest emergence of wild buckwheat was obtained from seed planted at the - to 2-in. depth of soil. Emergence occurred throughout the growing season, the peak being in May and early June. Less than 15% of the original infestation emerged during the first years in the soil. Flowers, immature seed, and mature seed were present on the same plants from August to the end of the growing season. Seed production per plant declined progressively from 30,000 for the mid-April seeding to 15,000 for the mid-June seeding.

Polygonum multiflorum Radix extract protects human foreskin melanocytes from oxidative stress in vitro and potentiates hair follicle pigmentation ex vivo.

Abstract: Objective To examine the ability of an extract from traditional Chinese medicine, Polygonum multiflorum Radix, to protect melanocyte viability from oxidative stress, a key mechanism in the initiation and progression of hair greying. Methods To assess the antioxidant capacity of Polygonum multiflorum Radix extract, primary human foreskin melanocytes were treated with a commercially available Polygonum multiflorum Radix extract added to culture medium and exposed to hydrogen peroxide (H2O2), using intracellular reactive oxygen species concentrations and glutathione/protein ratios as endpoints. To improve solubility for cosmetic uses, a new Polygonum multiflorum Radix extract was derived. As hair graying is the consequence of melanocyte disappearance in an oxidative stress environment, we checked if the anti-oxidant capacity of the new Polygonum multiflorum Radix extract could preserve melanocyte viability in response to H2O2-induced oxidative stress, and preserve pigmentation within ex vivo human hair follicles. Results In vitro treatment of primary human foreskin melanocytes with traditional available Polygonum multiflorum Radix extract resulted in decreased intracellular ROS accumulation in response to H2O2 exposure with a concomitant preservation of glutathione to protein ratio, consistent with a protective response against H2O2 exposure and demonstrating the promise of this extract for protecting melanocytes against oxidative stress. Melanocytes treated with the improved Polygonum multiflorum Radix extract exhibited attenuated H2O2-induced cell death, demonstrating a clear cytoprotective effect. Treatment of ex vivo human hair follicles with the improved Polygonum multiflorum Radix extract resulted in a higher level of melanin compared to vehicle-treated controls, demonstrating an ex vivo protective effect on hair pigmentation. Conclusion Polygonum multiflorum Radix extract protects in vitro primary human foreskin melanocytes from the deleterious effects of H2O2-exposure and improves pigmentation within ex vivo human hair follicles, demonstrating the utility of Polygonum multiflorum Radix extract as a potential active ingredient for the protection of melanocytes against premature death. This data provides in vitro mechanistic evidence consistent with existing in vivo studies for the use of Polygonum multiflorum Radix extract as a strategy for the prevention of oxidative-stress induced hair greying, in line with traditional Polygonum multiflorum Radix uses. This article is protected by copyright. All rights reserved.

Polygonum multiflorum planting method

Abstract: The invention discloses a polygonum multiflorum planting method which includes that soil is preferably deep, fertile, loose and good in water discharge and is better faintly acid and neutral sandy soil, the required PH value range is 6-7.5, and a plough layer is larger than 30cm. Soil preparation, base fertilizer application, furrow preparation and transplanting are conducted. Planting is conducted in sunny days after raining or in cloudy days in March or April each year, fixed planting is conducted on the furrow surface with the distance between plants in rows and between the rows being 20-30cm, and 9000 seedlings are planted each acre. After planting is finished, watering is conducted to fix the roots if it is dry or the soil is dry. Healthy cutting seedlings free of pest diseases and multiple in white roots are selected as planted seedlings. Intertillage weeding, top application and pruning are conducted. After the transplanted seedlings survive, harvesting is conducted when the tender stem is 20-50cm in length, the length of polygonum multiflorum vegetable is preferably 10-20cm, the length of polygonum multiflorum tea is preferably 2-3cm, and harvesting is conducted 2-3 times every month. The roots of the polygonum multiflorum can be harvested in autumn or winter of the third year or in spring of the second year after the seedlings are planted. By means of the method, the yield can be improved, and quality is stable.