Effect of salinity on growth, photosynthesis, water relations and solute composition of the potential cash crop halophyte Plantago coronopus (L.)

Macroporous Resin Adsorption for Purification of Flavonoids in Houttuynia cordata Thunb.

Germination and growth of Atriplex prostrata and Plantago coronopus: Two strategies to survive in saline habitats

Dental biofilms that form in the oral cavity play a critical role in the pathogenesis of several infectious oral diseases, including dental caries, periodontal disease, and oral candidiasis. Houttuynia cordata (HC, Saururaceae) is a widely used traditional medicine, for both internal and external application. A decoction of dried HC leaves (dHC) has long been consumed as a health-promoting herbal tea in Japan. We have recently reported that a water solution of HC poultice ethanol extract (wHCP) exerts antimicrobial and antibiofilm effects against several important oral pathogens. It also exhibits anti-inflammatory effects on human keratinocytes. In our current study, we examined the effects of dHC on infectious oral pathogens and inflammation. Our results demonstrated that dHC exerts moderate antimicrobial effects against methicillin-resistant Staphylococcus aureus (MRSA) and other oral microorganisms. dHC also exhibited antibiofilm effects against MRSA, Fusobacterium nucleatum (involved in dental plaque formation), and Candida albicans and inhibitory effects on interleukin-8, CCL20, IP-10, and GROα productions by human oral keratinocytes stimulated by Porphyromonas gingivalis lipopolysaccharide (a cause of periodontal disease), without cytotoxic effects. This suggests that dHC exhibits multiple activities in microorganisms and host cells. dHC can be easily prepared and may be effective in preventing infectious oral diseases.

/pdf/antibiofilm-and-anti-inflammatory-activities-of-houttuynia-3kw06ve3b4.pdf

Antibiofilm and anti-inflammatory activities of Houttuynia cordata decoction for oral care.

The aim of this study was to investigate the effects of salinity on germination, seedling growth, free polyamines (putrescine, spermidine, and spermine), and ethylene metabolism of two species (Atriplex prostrata Boucher and Plantago coronopus L.) with different salt sensitivities. Seeds collected from Barranco Hondo (salt marshes, Jaen, southern Spain) were germinated at 0, 50, 100, and 200 mM NaCl in a growth chamber. The germination of P. coronopus seeds decreased considerably with an increasing NaCl concentration, however, seeds of A. prostrata showed high germination percentages (84, 87, and 80 %) at 0 (control), 50, and 100 mM NaCl, respectively, and only at 200 mM NaCl, the germination was reduced to 25 %. In the early phase of vegetative growth (8-d-old seedlings), the fresh mass increased in A. prostrata at 50 and 100 mM NaCl but the fresh mass of P. coronopus showed no significant differences. With respect to polyamines, there was a decrease of the putrescine and spermidine content at all the NaCl treatments, however, the spermine content increased and was much higher in P. coronopus than in A. prostrata. The ethylene, 1-aminocyclopropane-1-carboxylic acid content, and the 1-amino-cyclopropane-1-carboxylic acid synthase activity increased with the increasing NaCl concentration in A. prostrata, and only the ethylene content in P. coronopus. These results indicate that P. coronopus increased the free spermine content, whereas A. prostrata increased the ethylene biosynthetic pathway in order to survive in the saline conditions.

Effect of salinity on polyamines and ethylene in Atriplex prostrata and Plantago coronopus

Pharmacognostical Studies of Houttuyniae Herba (1) : Flavonoid Glycosides Contents of Houttuynia cordata THUNB..

Studies on Genus Plantago Growing in Turkey (1). : Morphological Comparison of Leaf of the Wild Species.

Pharmacognostical Studies of Houttuyniae Herba (2) : Growth and Flavonoid Glycoside Contents of Houttuynia cordata.

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Pharmacognostical Studies of Houttuyniae Herba (1) : Flavonoid Glycosides Contents of Houttuynia cordata THUNB..

Studies on Genus Plantago Growing in Turkey (1). : Morphological Comparison of Leaf of the Wild Species.

Pharmacognostical Studies of Houttuyniae Herba (2) : Growth and Flavonoid Glycoside Contents of Houttuynia cordata.