Study on exogenous hormones inducing parthenocarpy fruit growth and development and quality of Siraitia grosvenorii / 中国中药杂志

To explore the growth and development and analyze the quality of the parthenocarpy fruit induced by exogenous hormones of Siraitia grosvenorii. the horizontal and vertical diameter, volume of the fruit were respectively measured by morphological and the content of endogenous hormones were determined by ELISA. The size and seed and content of mogrosides of mature fruit were determined. The results showed that the fruit of parthenocarpy was seedless and its growth and development is similar to the diploid fruit by hand pollination and triploid fruit by hand pollination or hormones. But the absolute value of horizontal and vertical diameter, volume of parthenocarpy fruit was less than those of fruit by hand pollination, while triploid was opposite. The content of IAA, ABA and ratio of ABA/GA was obviously wavy. At 0-30 d the content of IAA and ABA of parthenocarpy fruit first reduced then increased, content of IAA and GA parthenocarpy fruit was higher than that of fruit by hand pollination. Mogrosides of parthenocarpy fruit was close to pollination fruit. Hormones can induce S. grosvenorii parthenocarpy to get seedless fruit and the fruit shape and size and quality is close to normal diploid fruit by hand pollination and better than triploid fruit by hormone or hand pollination.

Evaluation on germplasm resources of main production area of Artemisia annua in China / 中国中药杂志

<p><b>OBJECTIVE</b>To evaluate and select excellent germplasm resources of Artemisia annua L., providing basic data for data base and breeding of A. annua.</p><p><b>METHOD</b>Seventy-two germplasms of A. annua, which were collected from main production areas, were planted in germplasm resources garden in Jingxi and Nanning under the same conditions. The samples were gathered in the squaring stage. Artemisinin was extracted by supersonic wave and determined by ultraviolet spectrophotometry.</p><p><b>RESULT</b>The leaf's yield and the content of artemisinin in the samples of different germplasms were varied significantly. Effect of environment on artemisinin content was more than that of hereditary factors. The content of artemisinin was different when the same material of A. annua grew in different place. The content of artemisinin in next year's plant was decreasing.</p><p><b>CONCLUSIONS</b>Seven germplasms from south of China have been selected, their content of artemisinin was above 0.9% and calculated yield was more than 2250 kg x hm(-2). The content of artemisinin has been affected by hereditary factors and variation of the growth environment.</p>

Study on quantitative assessment of Siraitia grosvenorii germplasms by general index / 中国中药杂志

<p><b>OBJECTIVE</b>To establish a weight-marking method and evaluate Siraitia grosvenorii germplasms.</p><p><b>METHOD</b>The characters of 21 kinds of S. grosvenorii germplasms in the field and the lab were analyzed, seven important characters were selected to weight the marks. A general evaluation index was made and used to evaluate S. grosvenorii germplasms.</p><p><b>RESULT</b>The evaluation result of 21 kinds of S. grosvenorii germplasms by the weight-marking method was consistent with production practice. Meanwhile, the new variety Yongqing No. 1 and major cultivars were the superior germplasms.</p><p><b>CONCLUSION</b>A rational technique system of evaluating S. grosvenorii germplasms was established, and the superior germplasms were selected.</p>

Effect of Type I Collagen on the Susceptibility of Low Density Lipoprotein to Oxidation.

In order to observe the effect of type I collagen on the susceptibility of low density lipoprotein (LDL) to oxidation, the collagen gel system was established in vitro. The presence of collagen resulted in a protracted lag phase as well as a decreased production of the thiobarbituric acid reactive substance (TBARS) when LDL was oxidized by the addition of copper ion. The relative electrophoretic mobilities (REM) of LDL in the treated group were far lower than those in the control group; while during the 2,2'-amidinopropane hydrochloride(AAPH)-catalyzed oxidation of LDL, neither the lag phase nor the maximum content of the output of TBARS were significantly affected by the presence of collagen. These results suggest that collagen may decrease the susceptibility of LDL to copper-catalyzed oxidation the mechanism of which may not involve the capture of free radicals.