[Response of volatiles of Artemisiae Argyi Folium to climatic factors].

Combined headspace solid-phase microextraction with gas chromatography-mass spectrometry (HS-SPME-GC-MS), this paper studied the volatiles of Artemisiae Argyi Folium that respectively collected from Kongdong, Huanglong, Ankang, Qichun and Tongbai，and then explored the influence of climatic factors on the main components of the volatiles. The results showed that 54, 52, 57, 47 and 55 compounds were respectively identified from the leaves from five regions, mainly consist of monoterpenes, sesquiterpenoids and their oxygen-containing derivatives, a few aldehydes, alkanes and benzenes. It is different that the volatiles of Artemisiae Argyi Folium that collected in different habitats, neither composition nor content. There are total 18 kinds of compounds that exist in all five leaves. Eucalyptol, camphor, terpinen-4-ol, eugenol and caryophyllene could be considered to be the main conponents because of their efficacy or toxicity and relatively high content. Grey correlation analysis shows that the annual lowest temperature and annual sunshine duration have a great influence on the content of eucalyptol and camphor; the effect of annual precipitation and annual accumulated temperature on the content of terpinen-4-ol and caryophyllene was relatively significant; while the annual sunshine duration and the annual highest temperature are the main influencing factors for eugenol. The research suggests that long-day and extreme temperature may be more conductive to the accumulation of volatiles. According to the laws of effect of climatic factors on volatiles, we can optimize the cultivation conditions and select suitable locality to improve the quality of Artemisiae Argyi Folium.

[Screening of different AFLP fragments between near-isogenic lines of male sterile and fertile Salvia miltiorrhiza and their comparison analysis].

There is distinctive advantage of using male sterile lines to breed new cultivar and produce hybrids, when compared with general breeding method on yield and quality. In our previous work, near-isogenic lines (NILs) of male sterile and fertile Salvia miltiorrhiza have been obtained through continuous hybridization in many years. In this investigation, 378 primer combination were screened by using AFLP and BSA technique, in which 26 markers amplified from seven primers were found to tightly link to male sterile gene. Based on these markers, two linkage genetic maps were constructed. A 2 027,2 028 bp fragment was amplifed from NILs of fertile and sterile S. miltiorrhiza, respectively, using genome walking technique and previous E11/M4-208 marker as template. Four base mutations were found in intron when comparing both fragments. Among all different markers between NILs of male sterile and fertile S. miltiorrhiza, four was found to have 100% identities to chromosome 1, 3 and 5 of Arabidopsis, namely, E01/M09-418, E05/M13-308, E05/M04-750 and E01/M01-204. The E01/M09-418 marker was very close to male sterile gene of S. miltiorrhiza with distance of 2.1 cM, which also had 100% identities to male sterile gene MS2 in Arabidopsis. Both were distributed in chromosome 3 of Arabidopsis. The 2 028 bp fragment also had 100% identities to MS2 gene. Another E05/M04-750 marker that had 100% identities to chromosome 5 of Arabidopsis was found to have high identities to POP085-M05 gene of poplars and low affinity calcium antiporter CAX2 of Arabidopsis with very low E-value. The constructed genetic map and differential fragments with potential functions found in this study provide a solid foundation to lock male sterile genes in S. miltiorrhiza genome and to discover their functions.

[Preliminary study on N, P, K fertilizer to control of root rot of Bupleurum chinense].

The application of N and K fertillizer could improve the sensibility of Bupleurvum chinense DC. to Root Rot, while large application of P fertilizer could decrase the sensibility. The fertilizer measure which could obtain highest yield but could not increase its disease resistense. To protect Bupleurum chinense against root rot, more phosphorous fertilizer, certain nitrogen and potassium ferilizer should be applied in early elongation stage in the second growing year.

[Preliminary study on the characteristics of Bupleurum chinense in nutrition uptake].

It was studied that the characteristics of Bupleurum chinense DC. in nutrition uptake based on potted and field experiment to provide a properly fertilizer application measure. The result showed that the absorption amounts of N, P and K were in the order of K > N > P under field condition. For one-year-old B. chinesnse DC., the average N, P2O5 and K2O absorption per 100 kg dry matter of root were 11.77 kg, 2.43 kg, 14.07 kg respectively; for two-year-old, the average N, P2O5 and K2O absorption amount per 100 kg dry matter of root were 12.11 kg, 2.74 kg, 18.39 kg respectively. The total absorption amount of N, P2O5 and K2O were lower in the first year, while the percentage of content was higher, that was to say, the demand for N, P and K was urgent in the first year. The accumulation peak of N, P2O5 and K2O occurred regreening to later elongation stage in the second year. The ratio of N, P and K were differential in different growth stages.

[Microecological mechanisms of red-leaf disease occurrence in Salvia miltiorrhiza Bge].

A comparative study was made on the nutrient content in rhizosphere soil and the microflora in rhizosphere soil and on rhizoplane of healthy and red-leaf diseased Salvia miltiorrhiza plants, aimed to approach the microecological mechanisms of red-leaf disease occurrence in S. miltiorrhiza. The N, P, K, and Mn contents in the diseased plant leaves were significantly lower than those in the healthy plant leaves (P < 0.05). No significant difference was observed in the available P content in the rhizosphere soils of diseased and healthy S. miltiorrhiza, but the available N and K contents were significantly higher (P < 0.05) in the rhizosphere soil of diseased S. miltiorrhiza. These results indicated that the red-leaf disease occurrence in S. miltiorrhiza was related to plant P deficiency, but the lack of P in the plants was not caused by the insufficient soil P supply. As compared with those in healthy S. miltiorrhiza rhizosphere, the bacterial number in diseased S. miltiorrhiza rhizosphere soil decreased by 41.3% , while the fungal and actinomycetes numbers increased by 156.6% and 189.5% (P < 0.05), respectively. Similar variations in the numbers of bacteria, fungi, and actinomycetes were observed on diseased S. miltiorrhiza rhizoplane. In the rhizosphere soil and on the rhizoplane of diseased S. miltiorrhiza, the predominant microbial species that might be harmful included six fungi (Fusarium solani, Myrothecium roridum, F. tricinctum, Aspergillus calidoustus, F. oxysporum, and Dothideomycetes sp.), four actinomycetes (Streptomyces lateritius, Lentzea waywayandensis, S. stelliscabiei and S. collinus), and two bacteria (Bacillus aryabhattai and Piscinibacter aquaticus). These predominant soil microbes likely caused plant P deficiency via negatively affecting the growth of roots and their absorption of soil nutrients. It was suggested that the red-leaf disease occurrence in S. miltiorrhiza was closely related to the plant P deficiency caused by the abnormality of soil microflora in the rhizosphere soil and on the rhizoplane of S. miltiorrhiza.

[Distributional difference of fat-soluble compounds in the roots, stems and leaves of four Salvia plants].

To illustrate distribution of fat-soluble compounds in the roots, stems and leaves of four Salvia plants, the methods of Histochemistry and HPLC were adopted to analyze different parts of the four Salvia plants in this paper. The results showed that distribution was differential, and following as this: the roots, stems and leaves of four Salvia plants contained fat-soluble compounds, moreover, the fat-soluble compounds of the roots located in periderm and the stems and leaves in epidermis. The main components of the fat-soluble compounds were Tanshinone IIA, Tanshinone I and Dihydrotanshinone I in the toots of Salvia miltiorrhiza Bunge and Salvia miltiorrhiza bge. f. alba, yet there were only Tanshinone IIA in the roots of Salvia japonica and Salvia officinalis. And fat-soluble compounds were not Tanshinone IIA, Tanshinone I and Dihydrotanshinone I in the stems and leaves of four Salvia plants. The type and content of fat-soluble compounds related to the species and introduction regions, they changed with the species and introduction regions. The conclusion clarified the accurate distribution of fat-soluble compounds in the different parts of four Salvia plants, and provided some theoretical basis for the application of Chinese herbs.