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10 June 1996, Volume 25 Issue 02 Previous Issue    Next Issue

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Effects of Postharvest Calcium Treatments to Litchee Fruits on the Activities of Three Kinds of Enzymes Liu Hongzhou, You Ruichen, Huang Weinan 1996, 25(02): 1-5.  Abstract ( )   PDF (297KB) ( )   Calcium at various concentrations was applied to litehee fruits at postharvest.The changes of peptinesterase,polygalacturonase and cellulase activity of fruits were determined in order to find out an optimum calcium concentration to delay the ripening and deeaying of litehee fruits.4%.calcium treatment was found to be able to retard the activity of these enzymes,delay the appearance of peaks of enzyme activity or even disappear,thus delaying the decay of fruits. Related Articles | Metrics

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Conditions and Effects of Clarifying Fruit Juices with Immohilized Pectinase Chen Songhe, Lin Yaohui, Liu Xinmin, Shen Yufen, Chen Yiliang 1996, 25(02): 6-12.  Abstract ( )   PDF (382KB) ( )   The conditions and effects of clarifying four kinds of fruit juices with immobilized pectinase were studied.The results showed that the immobilized pectinase has a distinct clarification effect on citrus,apple,pear and plum juices. Both emzyme activity and pervious efficiency to light retained up to 80% after reacting more than 20 times with immobilized pectinase in citrus juice. The optimum reaction conditions of citrus juice were as follows:juice concentration 50%,pH 3.0~3.5,reaction temperature 45~50℃,reaction time 2 h,immobilized pectinase dosage 0.05 g/ml juice,clarification time 20 h. Related Articles | Metrics

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Aseptic Seeding and in Vitro Rapid Propagation of Eustoma russellianum F1 Zhang Shujuan, Liu Yuming 1996, 25(02): 13-16.  Abstract ( )   PDF (252KB) ( )   Seeds of Eustoma russellianum F1 germinated on (1)/(2) MS medium. Shoot tips and stems with leaf were succesively subcultured on (3)/(4) MS medium added with 6-BA 0.1 mg/L and NAA 0.03 mg/L and a large number of rosette buds were reproduced.The rootless tube shoots rooted on pearl rock medium in 20 days and survived up to 95%. Related Articles | Metrics

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Black Heart of PineappleFruits Induced by Preharvest Chilling Temperature Tang Youlin, Zhou Yuchan, Zhou Yongcheng, Tan Xingii 1996, 25(02): 17-20.  Abstract ( )   PDF (262KB) ( )   The black heart of pineapple fruits induced by preharvest chilling temperature was studied and discussed.The incidence of blackheart induced by chilling temperature was 60%~100% in autumn and winter. The results suggested that the effect of chilling temperature below 21℃ at preharvest was one of important factors in inducing of pineapple blackheart.In South China,there is a difference of sensibilitv to blackheart in different pineapple varieties. Therefore breeding and planting of new blackheart-resis-tant varieties of pineapple would be an important measure in control of blackheart of pineapples. Related Articles | Metrics

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In Vitro Culture of Small Floral Receptacle of Gerbera jamesonil Lu Xuehua, Lin Yong, Guo Wenjie 1996, 25(02): 21-24.  Abstract ( )   PDF (240KB) ( )   Explants of small floral receptacles of clonal Gerbera jamesonil were cul-tured in vitro. The result showed that the size of small floral receptacles affected bud ini-tiation from the callus. The best result was found with 0.5~0.7 cm diameter of the ex-plants. The inducing rate of bud initiation decreased with increasing explants diameter.The best induction was found on MS medium containing various hormones added with 6-BA 10 mg/L. Rooting on (1)/(2) MS medium added with IBA 0.3 mg/L was the most effec-tive. Related Articles | Metrics

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Identification of Pathogen of Fungous Diseases of Phoenix canariensis Zhang Hong, Lin Qinghong 1996, 25(02): 25-27.  Abstract ( )   PDF (175KB) ( )   Two fungous diseases of Phoenix canariensis seriously developed in Xia-men in 1994~1995.The identification of pathogen confirmed that stem blight was caused by Comiothyrium palmarum Corda and false smut by Graphiola phoenicis (Moug) Poit. Related Articles | Metrics

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Reaserch on Woody Flora of Mangdang Mountain at Nanping in Fujian Huang Ziliang 1996, 25(02): 28-33.  Abstract ( )   PDF (351KB) ( )   719 woody species which belong to 272 genera and 102 families are re-ported in this paper. These species are divided into 13 distribution types which take up 86.7% of Chinese distribution types. This flora is characterized by its complicated com-ponents,numerous species,old origin and several rare and endangered species,and close-ly relative to other floras in the world,especially to the flora of North America. Related Articles | Metrics

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Characteristics and Protection of Quanzhou Flora Luo Guangtan, Ye Youqian 1996, 25(02): 34-39.  Abstract ( )   PDF (368KB) ( )   The major characteristics of Quanzhou flora are rich in plant species,more ancient and relict plants,and monotypic genera and families,some of which are en-demic genera in China. The floristic composition is complex. The genera and families in tropical and subtropical zone are dominant.The resources plants should be protected and reasonably exploited and utilized. Related Articles | Metrics

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Nodulation, Nitrogen Fixation and Agronomic Use of Stem-Nodulating Legumes Huang Zhihong, Huang Weinan 1996, 25(02): 40-46.  Abstract ( )   PDF (531KB) ( )   Stem-nodulating legumes have higher nodule biomass and N2 fixation due to dual nodulation,tolerance of flooding,alkali and acid.They are also unaffected to some extend by mineral N. The use of Sesbania rostrata and Aeschynomene afraspera as green manure crops in low-land rice farming systems is a viable alternative to mineral N fertilizer application. Related Articles | Metrics

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Research Advance on Citrus Germplasm Preservation in Vitro Quan Yin 1996, 25(02): 47-51.  Abstract ( )   PDF (325KB) ( )   The research advances on citrus germplasm in vitro over the last ten years are outlined,including materials used and preservation methods. It indicates that the method of citrus germplasm preservation in vitro may avoid the shortcomings of in vivo preservation,but may not substitute in vivo preservation. Further research are need-ed on the method. Related Articles | Metrics