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10 June 1994, Volume 23 Issue 02 Previous Issue    Next Issue

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Study on H2-oxidizing System in Bacteroid from Rhizobia arachis Xu Liangshu, Zhang Fengzhang, Long Minnan, Huang Nanzhong 1994, 23(02): 1-7.  Abstract ( )   PDF (380KB) ( )   An investigation was conducted to identify electron transport carriers that participated the oxidation of H2 in bacteroids of Rhizobium arachis.H2-reduced mi-nus O2-oxidized absorption difference spectra in bacteroids showed peaks at 424,500,520,550,560,585 and 595 nm,indicating the involvement of c-,b-,a and o-types of cytochromes,The absorption peaks at 520,550,560 nm were diminished a lot in the pres-ence of CN- This showed that some of c- and b-type cytochromes were CN- sensitive and therefore might play a role as terminal oxidases in H2 metabolism. H2-uptake was in-hibited by antimycin A,HONO,CN-,N3- and DBMIB,not by rotenose,Our resultsindicate that ubiquinone and some types of cytochromes are involved in the oxyhydro-gen reaction which is a complex,branched transport system. Related Articles | Metrics

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Absorption of 32P by Leaf and Peel of Citrus unshiu during Fruit Development Xie Shenxi, Zhang Qiuming 1994, 23(02): 8-13.  Abstract ( )   PDF (365KB) ( )   Satsuma (Citres unshiu) fruits were used as materials.The 32P absorptionrule and mechanism of phosphorus were studied with isotopic trace technique duringfruit development.The results showed that phosphorus sprayed on the surface of leafand peel was taken up and utilized at different rates,and then assimilated as the cos-tituent of proteins,nucleic acid,phosphatides and acid-soluble phosphorus compounds.The absorption ability of peel decreased with increasing of ocellus,thickening of waxylayer and cell ageing,98.48% of 32P absorbed by peel remained in peel. Related Articles | Metrics

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Physiological Fundamentals of Preventing Rice Seedlings from Rotting by ‘Yangbaoling’ (Plant Cold Resistant) Guo Jinquan, Chen Wentao, Shen Ruichi, Lai Menghong, Xu Zhenyu 1994, 23(02): 14-18.  Abstract ( )   PDF (296KB) ( )   Soaking the seeds of early rice in ‘Yangbaoling’ solution effectively pre-vents rice seedlings from rotting and improves the quality of rice seedlings.This is at-tributed solely to accelerating the speed of turning green of young leaves,increasing the amount of combined water in sprouts and leaves and the soluble protein in sprouts and enhancing the activity of roots so that the treatment with ‘Yangbaoling’ can increase the low temperature stress tolerance of rice seedlings. Related Articles | Metrics

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Mutation and Selection of Resistant Precursor of Griseofulvin Producing Strain F-1012 and Its Fermentation Shen Yufen, Wu Songgang 1994, 23(02): 19-25.  Abstract ( )   PDF (381KB) ( )   The Pen·patulum D-756 was taken as the original strain.After three-generation treatment with UV and LiCl,and adopting a rapid screening method,the mu-tant Strain F-1012 of resistant precursor was obtained.The result of the resistance to chloride character and fermentation of the mutant strain showed that the yield of the mutant strain was the highest when the concentration of chloride in the fermentation medium was raised to 2.0% and ground rice was raised to 18% The optimum conditions were as follows:nature pH 5.7,the volume of inoculation was about 15%,250 ml shake bottle filled with 20 ml medium,cultivation time in the liquid fermentation medium was 288 hours. Related Articles | Metrics

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Relation between the Content of Leghemoglobin and Nitrogenase Activity in Stem Nodules of Sesbania rostrata Wang Huiying, Huang Weinan 1994, 23(02): 26-29.  Abstract ( )   PDF (238KB) ( )   The nitrogenase activity and the content of leghemoglobin in stem nod-ules of Sesbania rostrata were determined at different stages of nodule development,at different periods of plant development and under different illumination conditions.These resuIts show that the nitrogenase activity in stem nodules is possitively correlated with the content of leghemoglobin,Leghemoglobin plays an important role in nitrogen fixa-tion of stem nodules. Related Articles | Metrics

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Similaritises and Differences in Leaf Structure and Ergastic Substances among Ilex kudingcha and Its Two Substitutes Zhang Zhenjue 1994, 23(02): 30-34.  Abstract ( )   PDF (342KB) ( )   The leaf structure of Ilex latifolia and I.cornuta is similar to that of I.kudingcha:bifacial leaf,palisade tissues of several layers,collaferal vascular bundle,little vascular bundles with bundle sheathes;the stomata are scattered on lower epidermis,ap-pearing in anomocytic and cyclocytic type;in leaves there are fibers and sclereids.The cells of mesophyll in these species contain tannin,starch,lipid;few cells contain crystal of calcium oxalate,The differences in structure are as follows:main vascular bundles of leaf stalk and leaf blade in I.kudingcha curve like heart-shaped ring,while in I.latifolia and I.cornuta like arc.On leaf margin,in I.cornuta there are big bundles of fibers that lay across the transection of leaf blade,while in other two species,a little fiber only. Related Articles | Metrics

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Cultivation of Hericium erinaceus with the Sawdust of Three Fast-growing Nitrogen-fixing Trees Guo Cuiying, Liu Fuping, Chen Fangshun, Huang Weinan 1994, 23(02): 35-38.  Abstract ( )   PDF (234KB) ( )   The sawdust of nitrogen-fixing trees,Leucaena leucocephala,Albizia falcataria and Acacia auriculaeformis was used as main substrate added with cotton seed shell to culture Hericium erinaceus.The sawdust of Castanopsis hystrix was used as mainsubstrate for the control.The results showed that the hyphae grew strongly and homo-geneously;the daily growth rate was 5.4%~16.2% higher than that of the control.The yield increased 6.0%~13.9% than that of the control.The hyphae grew the fastest in the media added with the sawdust of Albizia falcataria,in the media added with Leucae-na leucocephala came second;while the yield was the highest in the media added with Leucaena leucocephala,the higher yield was in the media added with Acacia auriculafor-mis. Related Articles | Metrics

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Phenological Observations of Nervilia plicata Chen Zhongren, Chang Yongtian 1994, 23(02): 39-42.  Abstract ( )   PDF (238KB) ( )   The two-year phenological observations upon cultivated folk medieinal plant Neruilia Plicara (Andr.) Sehetr.in Xiamen are presented.Young leaves or inflores-eenees emerge from eaeh of tuber terminals and elongated rhizomes in early May,and fresh leaves begin to unfold in late May.The flowering season begins from mid May to mid June.And fruits mature or drop later.The new flushes of inflorescence arise from this plant.Leaves turn greybrown and die off from early October to late December and then the plant send up tubers or rhizomes the next year. Related Articles | Metrics

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Commercial Postharvest Storage of Canarium album Fruits at Room Temperature Zhou Xinyue 1994, 23(02): 43-47.  Abstract ( )   PDF (289KB) ( )   The effect of packing material,immersing time of fruits in preservative solution,preservative concentration and preservatives upon postharvest storage of Canarium album fruits at room temperature were studied.The results showed that the preservation action of bavistin-synergist B was more effective,and the concentration of preservative was bavistin 1000 ppm-synergist B 30~45 ppm;the optimum immersing time of fruits in the preservative solution was 3 minutes;the polychloroethylene film(thick-ness 0.01 mm) bags were the best packing materials for preservation of Canariuln album fruits. Related Articles | Metrics

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Characteristics and Distribution of Aciculisilvae in Quanzhou,Fujian Luo Guangtan, Youqian 1994, 23(02): 48-55.  Abstract ( )   PDF (469KB) ( )   Pinus massoniana forests in Quanzhou,Fujian Provinee,extensively dis-tribute in the mountains under 1300 m above sea level,eonsisting of natural and artifieial forests.Cunninghamia laneeolata forests,mostly grown by artificial culture,distribute under 1300 m above sea level.Pinus taiwanensis forests distribute under 1300 above sea level,they are all natural forests straight to the top of the Daiyunshan Mountains.Fukienia hodginsii forests are grown by artifieial culture at some forestry centres.The analysis of floristic compositions,life forms,leaf quality and strueture of community demonstrate the community eharaeteristies of subtropieal evergreen aeieulisilvae. Related Articles | Metrics

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On the Protection, Restructure and Exploitation of Plant Resources on Coastal Islands in Fujian LiJinsuan, Xie Meiyun, Kong Fansheng 1994, 23(02): 56-60.  Abstract ( )   PDF (331KB) ( )   This paper describes the status of plant resources on coastal islands in Fujian province and points out the problem of seriously declined resources,poor in tree species,bad forest ecological efficiency,backward fruit production and poor in kinds of crop plants,etc,It is suggested that we must practically and effectively protect the exist-ing vegetation,establish more shelter forests with conferous and broadleaf mixed forests,speed up afforestation in barren hills and seaside sandywastes,actively develop fruit production and construct forests for tourism. Related Articles | Metrics