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The effects of different cadmium (Cd) concentrations (0, 20, 60, and 100 micromol/L) on hydroponically grown Artemisia annua L. were investigated. Cd treatments applied for 0, 4, 12, 24, 72, 144, 216, and 336 hr were assessed by measuring the changes in photosynthetic pigments, electrolyte leakage, malondialdehyde (MDA) and antioxidants (ascorbic acid and(More)
Rare earth elements (REEs) have been widely used to increase accumulation of biomass and secondary metabolites in medicinal plants in China. However, very few studies have investigated how REEs mediate secondary metabolism synthesis in medicinal plants. Lanthanum (La), an important REE, is known to improve the accumulation of secondary metabolites in(More)
Flavonoids are an important effective component of traditional Chinese medicine, which are widely distributed in the plant kingdom. The biosynthesis of flavonoid in plants is affected and regulated by various environmental factors. For a necessary environmental factor to plant growth and development, mineral nutrients are paid more and more attention on the(More)
This study analyzed the effects of ecological factors on secondary metabolites of Scutellaria baicalensis using two sources: 92 individual roots of S. baicalensis from all over China, and secondary metabolites, medicinal materials and inorganic element contents obtained from the testing of 92 S. baicalensis rhizosphere soil samples. The study used(More)
The review deals with the phenomenon of autotoxicity in medical plants. The autotoxic potential could be attributed to direct inhibition of plant growth and some diseases could be promoted by autotoxin. Factors affecting autotoxicity include species and cultivars, soil microbes, plant's nutrient situation and soil type etc. Autotoxicity could be overcome or(More)
This review introduce of new technique and method for geoherbs analysis. After reviewing the chemical principle, optical principle and the chemometer of near infrared spectroscopy (NIRS) , it analyzed the characteristic of NIRS and the difficulties of geoherbs analysis, and pointed out that NIRS had great advantage in geoherbs analysis for its full(More)
OBJECTIVE To explore the solution of continuous cropping obstacle of Panax notoginseng. METHOD The effects of balanced fertilization and soil amendment on the emergence rate, survival rate, growth and yield of P. notoginseng were studied with a pot culture experiment in 3-year-interval continuous cropping soil. RESULT The result showed that the content(More)
OBJECTIVE To study the characteristics of dry matter accumulation and N, P, K, Ca and Mg accumulation and distribution of Chrysanthemum morifolium. METHOD The sampling were carried out on the different growing time of C. morifolium, and the amount of dry matter and the content of N, P, K, Ca and Mg in all parts of the plant were measured. RESULT The dry(More)
Top-geoherbs used in China are always featured with high qualities, and they grow in specified areas with specific environment. Recently, researches on top-geoherbs have attracted increasing attention in China and other countries. In order to have a thorough knowledge of top-geoherbs, this article reviews the concept, historical evolution, common trait and(More)