Abstract:A procedure of whole mount flurescence in situ hybridization (WFISH) for detecting specific DNA in rice was reported. The techique was demonstrated on root and anther of rice with rDNA as probe, labelled by DIG. It was found that the hybridization efficiency depended on the methods further used after fixation, types of tissue and of fixative. Fixation in 1% formalin plus enzyme digestion could yield excellent results of DNA:DNA in root tips. Fixation in 1% formalin (no need enzyme digestion) yielded the excellent results with respect to morphology and hybridization efficiency in rice anther.

Abstract:用具有１７６个ＲＦＬＰ标记的ＤＨ群体及其图谱，对控制水稻产量、株高及其相关性状的ＱＴＬｓ进行区间作图。共定位了４７个ＱＴＬｓ，其中影响产量及其相关性状的ＱＴＬｓ３３个，影响株高及其相关性状的ＱＴＬｓ１４个，并估算了每个ＱＴＬ的加性效应和贡献率。一些性状的定位结果与其他人的研究有所差异，可能是研究材料和环境条件的不同所引起，水稻数量性状基因型与环境互作的研究将对此作进一步探讨。

Abstract:Karyotype analyses of two Guangdong tea varieties, i.e. Ruyuan Baimao and Taishan Baiyun,which have local feature of Guangdong, were conducted. The results showed that the two varieties were of diploids( 2n=2x =30) though cells with fewer than 30 chromosomes were observed. Particularly a haploid cell in Ruyuan Baimao variety was observed. The karyotype symmetry analysis showed that the two varieties originated and evolved comparatively later than many other tea varieties.

Abstract:采用秘鲁番茄茎段原生质体进行液体浅层培养，从试用的多种培养基中筛选出了１种适宜的原生质体培养基、２种增殖培养基、２种分化培养基，在此基础上，建立了秘鲁番塬生质体再生成株体系。最短再生周期只需４２￣４５ｄ。整个实验共获得１００多个再生植株，其中一部分定植到土壤中，均能正常生长、开花和结籽，经性状观察及染色体数目分析，均为正常的二倍体植株。

Abstract:在恒温条件下研究了温度对美洲斑潜蝇生长发育的影响，并分别用线性回归模型和Ｓｔｉｎｎｅｒ模型模拟温度与该害虫生长发育的关系。结果表明，在广州地区美洲斑潜蝇１ａ可发生１６个世代；在温度为１３￣３４℃范围内，美洲斑潜蝇各虫态发育历期均随温度的升高而缩短；其卵、幼虫、蛹及世代的发育起点温度分别为９．３３２、９．５７２、９．４４３和９．５７２℃；最大发育速率温度分别是３２．５０、３２．００、３１．５０和３１

Abstract:测定了沙蚕毒素类农药杀虫单、杀虫双、易卫杀、多噻烷、巴丹对美洲斑潜蝇各龄幼虫、雌成虫的毒力，进行了成虫取食忌避试验和田间小区试验。结果表明：（１）美洲斑潜蝇１、２、３龄幼虫对杀虫单最敏感，其ＬＣ５０分别是０．１０６１、０．１２６４、０．１６００ｇ／Ｌ，其毒力回归曲线斜率分别是：７．９７８０、６．９５６１、５．１８６４。美洲斑潜蝇幼虫对沙蚕毒素类农药以１龄最敏感，３龄幼虫对该类农药的ＬＣ５０是１龄的

Abstract:荔枝巢蛾是国内近年发现危害荔枝的新害虫，此虫在广州每年发生１代，跨年完成，以高龄幼虫在寄主枝干表皮被害处越冬。４月中旬到５月中旬为越冬后幼虫的化蛹期，在２５￣３０℃、相对湿度为６５％￣８０％的室内条件下，蛹期为８￣１５ｄ；５月上旬成虫始见，交尾后产卵于树表皮，成虫期为２￣１０ｄ，卵期为６￣１２ｄ；幼虫以树皮为食，整个幼虫期长达３２０￣３４０ｄ。每年９月至１１月为幼虫取食危害的高峰期。值得特别指出：

Abstract:在草甘膦药液中加入φ为０．１％或０．２％的ＡＰＳＡ－８０后，表面张力降低了６１．５６％和６４．８６％；在８种窄叶杂草和９种阔叶杂草叶子上接触角明显降低；药后２０￣３０ｄ，防效在８４．８５％￣９６．５６％，单用仅４４．３３％￣５２．３３％，药后４０ｄ时的杂草干物质积累量被抑制在８３．８５％以上，抑制率比单用提高了２２．２７％￣５４．１１％。结果还表明：ＡＰＳＡ－８０具有延长草甘膦持效期、加快杀草速率

Abstract:在敌百虫和兴棉宝药液中分别加入φ为０．０１％￣０．０４％的ＡＰＳＡ－８０，表面张力降低４１．８３％￣６０．４３％；在荔枝叶上的接触角降低３７．００％￣６４．２２％，沉积量增加１２．８３％￣３５．４１％；室内毒力试验测定表明，敌百虫与ＡＰＳＡ－８０混用后，ＬＣ５０比单剂分别降低２３．７３％和１３．６９％，增效系数分别为１３１．１１和１１７．５１；田间试验结果表明：ＡＰＳＡ－８０能够明显提高兴棉宝防治

Abstract:试验采用人工喷雾接种方法，通过对接种体浓度、保湿时间和苗龄试验，摸索出了一套适合于菜心炭疽病苗期抗病性鉴定的方法，即在气温为２３￣３２℃范围内，用６×１０＾６￣１×１０＾７个／Ｌ的分生孢子悬浮液于３￣４片叶期接种，保湿２４￣４８ｈ，７ｄ后调查病情，可明显地区分出菜心品种对炭疽病的抗病性差异。

Abstract:从番茄植物的几种有机成分中，选出了５种成分进行单一和２种成分混合的生物活性测定试验。它们分别为：Ａ．邻苯二甲酸二异辛酯，Ｂ．邻苯二甲酸二丁酯，Ｃ．水杨酸甲酯，Ｄ．水杨酸，Ｅ．鞣酸。选用生菜、白菜和萝卜作为受体。结果表明，Ｄ、Ｅ的抑制作用的临界浓度为５×１０＾－４ｍｏｌ／Ｌ，Ａ、Ｂ、Ｃ的抑制作用的临界浓度为２．５×１０＾－２ｍｏｌ／Ｌ；酸与酯之间存在不同程度的协同作用或拮抗作用；混合物的组分、组分物

Abstract:Species diversity of the natural forest communities in Nanling National Nature Reserve,Guangdong, was studied by computing the species diversity indices, species evenness and ecologcal dominance of 9 formations .The species diversity indices (Shannon-Wiener Index)ranged from 2.90 to 5.34 ,species evenness from 0.56 to 0.87 and ecological dominance from 0.05 to 0.25. The differences of species diversity indices became larger with forest types from montane coniferous forests to montane coniferous and broadleaved mixed forests, to hilly and low mountainous evergreen broadleaved forests. The relationships between species diversity,habitat and community stability were also analysed in this paper.

Abstract:研究了广州地区晚稻２个稻种（Ａ．“粳籼８９”；Ｂ．“汕优６３”）在２种施肥处理（１．有机肥＋化肥；２．化肥）下，各个试区的甲烷排放通量与排放规律。研究表明：在处理１和处理２“粳籼８９”的ＣＨ４排放通量分别为２６．９和９．６ｍｇ／（ｍ＾２·ｈ）；“汕优６３”分别为２３．３和１１．３ｍｇ／（ｍ＾２·ｈ），两个稻种在同种施肥及其它田间管理条件下，ＣＨ４排放通量没有显著差异，并且排放规律一致。在对“粳籼８

Abstract:试验采自江西省临川县第四纪红色粘土发育的红壤为样品进行研究表明：红壤及其复合体中Ｏ－Ｐ，Ａｌ－Ｐ，Ｃａ－Ｐ，Ｆｅ－Ｐ的质量分数在同一粒径的复合体随肥力水平提高而增加，同一土壤中不同粒径的复合体４种不同形态无机磷质量分数随粒径增大而减小。红壤中不同形态无机磷主要存在于〈２μｍ的复合体中，随着粒径增大，其质量分数迅速减少。培肥土壤，可以迅速增加Ａｌ－Ｐ的质量分数，增加作物磷的供应。

Abstract:Studies on the micromorphological characteristics of two soils originating from granite in Guangdong province indicated:the skeleton of the soils were mainly eroded quartz and they appeared in the porphyric pattern. A well-developed prismatic structure and slight microaggregation were found in the soil body, the plasmas were in red and showed slight birefringence. Some concretions of Fe, Mn and siltane were also found in the soils body.

Abstract:柯氏艾美耳球虫的内生发育包括２代无性繁殖和１代有性繁殖，第１代裂殖生殖阶段的时间为感染后至４８ｈ，第２代裂殖生殖阶段的时间为感染后４８￣８４ｈ，配子生殖阶段始于感染后７６ｈ。感染后９０￣１３８ｈ在肠绒毛中发现成熟的配子体，感染后９６ｈ在回肠肠腺中发现卵囊，至１３８ｈ仍可见。最短孢子化时间为９￣１２ｈ。柯氏艾美耳球虫的宿主特异性强，不感染虎皮鹦鹉、八哥、鹌鹑和雏鸡。

Abstract:用气体吸附法收集窿缘桉树条自然散发的香气，用气相色谱／质谱联用设备对其分析鉴定。结果表明其香气由７３种化合物组成；对其中１６种进行了定性和定量鉴定。其中含量最高的是φ（α－蒎烯）＝３３．４６％，其次是φ（β－蒎烯）＝１４．１９％和φ（１，８－桉叶油素）＝１４．１６％。

Abstract:应用“同步蒸馏－萃取法”提取佛手柑外果皮、内果皮及佛手柑干粉中挥发油，经ＧＣ－ＭＳ鉴定，鲜佛手柑外果皮油分离得１６５个峰，鉴定了４６种成分，φ（萜烯类）＝７３．４４％，苎烯、萜品油烯、β－蒎烯和β－月桂烯的体积分数分别为５％以上。肉质内果皮油中分离得到１５３个峰，鉴定了４９种组分，φ（烷烃类）＝６６．９２％，体积分数为５％以上的萜烯类有苎烯和γ－萜品烯。佛手柑干粉提取物分离出１９４个峰，鉴定出５８

Abstract:采用超临界流体设备，以ＣＯ２为萃取剂，从野生红芝子实体中萃取灵芝三萜化合物。分析了ＣＯ２密度、温度、时间及改性剂（甲醇）对红芝三萜化合物萃取的影响。

Abstract:Essential oil of Vanilla planifdia Andr . was obtained with supercritical CO 2 fluid extration method,its composition being analyzed by GC/MS technique. From 44 chromatographic peaks,11 chemical components were identified, accounting for 80.1% of the total content of the essential oil.The content of Vanillin, with a 64.83% relative content, is the highest.

Abstract:In this paper five new taxa of Cymbidium (Orchidaceae) from Asia,i.e. Cymbidium prompovenium;C.longipes;C.induratifolium; C.yongfuense; C.nigrovenium are described and illustrated.