Study on seed quality test and quality standard of Platycodon grandiflorum / 中国中药杂志

<p><b>OBJECTIVE</b>To study quality test, and establish quality classification standard of Platycodon grandiflorum.</p><p><b>METHOD</b>The seed quality and planting quality of P. grandiflorum from different producing areas and in different growing years were measured.</p><p><b>RESULT AND CONCLUSION</b>The range of seed purity, weight per 1000 seeds, seed moisture content,seed viability were determined and the primary seed quality classification standard was established.</p>

Studies on germination characteristics of Platycodon grandiflorum seed / 中国中药杂志

<p><b>OBJECTIVE</b>To find out the optimal condition for the germination by studying the effects of light, temperature, seed soaking and cultivation condition on Platycodon grandiflourm, and offer the basis for standardized culture of P. grandflorum.</p><p><b>METHOD</b>The rate of water absorption of the seed was determined. The germination of P. grandiflorum seed was tested under following conditions: treatments under different temperature (10,15,20,25,30 degrees C), light treatments (light and dark), seed soaking time (12,24,36 h) and different germination cultivation conditions (on filter paper, between filter paper, between gauze,on gauze).</p><p><b>RESULT</b>The water absorption of the seeds reached the maximal 120% within 36 h at 25 degrees C. The time of seeds soaking had limited effect on the germination of the seed, while temperature and light condition showed significant effects on the germination.</p><p><b>CONCLUSION</b>The optimal condition for the germination of the seed of P. grandiflorum is as follow:seed soaking for 12 h, and 25 degrees C underlight.</p>

Influence of exogenous substance on germination of Platycodon grandiflorum seeds / 中国中药杂志

<p><b>OBJECTIVE</b>To study of exogenous substances on the germination rate of Platycodon grandiflorum and offer the basis for the standardized culture of P. grandiflorum.</p><p><b>METHOD</b>At 25 degrees C, under darkness and lightness, do pretreatmeats on seeds by using GA3, H2O2, KMnO4, PEG at different concentrations.</p><p><b>RESULT</b>The results indicated that the pretreatments with GA3 at a concentrating of 50-250 mg x L(-1) and 1%-2% of H2O2 could increase germination of P. grandiflorum seed at a certain degree. Contrariwise 0.1%-0.5% of KMnO4 and 15%-35% of PEG inhibited the germination.</p><p><b>CONCLUSION</b>Pretreatment with 50-250 mg x L(-1)GA3 and H2O2 at a low cencontration could increase the seed germination of P. grandiflorum.</p>

Study on characteristics of seed germination of Salvia officinalis / 中国中药杂志

<p><b>OBJECTIVE</b>To investigate the influences of lightness and temperature on seeds germination of Salvia officinalis, and offer the basis for the standardized cultivation of S. officinalis.</p><p><b>METHOD</b>The morphological characters, 1 000-grains weight and rate of water absorption of the seed were observed, the germination capacity, percent of germination power and germination index at the five different degrees: 10, 15, 20, 25, 30 degrees C were also measared.</p><p><b>RESULT</b>1 000-grains weight of the seeds was 8.03 g, the rate of water absorption is 49% within 24 h, the highest rate of germination capacity reached 85.33%, the germination index is 45.56.</p><p><b>CONCLUSION</b>The lightness and 25 degrees C are the most suitable parameters for the seed germination of S. officinalis.</p>

Studies on germination characteristics of Prunella vulgaris seeds / 中国中药杂志

<p><b>OBJECTIVE</b>To understand the effect of illumination, temperature on the germination of the Prunella vulgaris seeds.</p><p><b>METHOD</b>The general germination method.</p><p><b>RESULT</b>Illumination showed no clearly effect on the germination rate of the P. vulgaris seeds under proper temperature condition; However, illumination was the main factor to determine the germination rate of the P. vulgaris seeds when the temperature condition was unsuitable. The germination rate of the P. vulgaris seeds decreased with the time and increased when the marinating time was from 12 to 36 hours. When temperature reached 5-25 9 degrees C, the trend of the germination rate increased at frst and then decreased.</p><p><b>CONCLUSION</b>The optimal germination condition of P. vulgaris seeds is 12 h of marinating time at the temperature of 20 degrees C under illumination.</p>