水稻三化螟蚁螟在稻株上的定向、着生习性及对水稻不同组织和人工合成“稻酮”的趋化性反应试验   总被引：1，自引：0，他引：1  

夏基康  苏业瑜  顾启明  王连泉  张孝羲  耿济国 《植物保护学报》1980,7(2):93-100

本项工作的目的在于探求水稻三化螟Tryporyza incertulas(Walker)初孵幼虫在稻株上的定向特性,为鉴定水稻的不同生育期、品种植株间的抗螟性能做一些基本工作。其次,以人工合成的“稻酮”进行蚁螟趋化反应试验。工作系于1961—1964年进行。所得结果初步表明:1.在稻株上的定向部位:蚁螟侵入孔距稻株基部的相对高度为,分蘖期<10厘米;圆秆期10—20厘米,孕穗期后>30厘米。在生长期相同的植株上,籼稻>粳稻。入侵途径以叶鞘侧部的脉间蛀入为主,部分咬脉而入。2.蚁螟在分蘖期至圆秆期稻株上主动选择叶鞘部位入侵,并非由“向地性”所支配。3.蚁螟对各生育期水稻叶鞘组织的趋化反应与成虫的产卵选择性相吻合,即偏选分蘖期与孕穗期的稻株(或叶鞘)。4.在稻株叶鞘及孕穗穗苞内含有诱致蚁螟的物质,而在稻叶叶片组织内可能含有拒食作用的物质。5.蚁螟着生数量,在秧苗上为,17天秧>44天秧;在分蘖与圆秆期稻株上,籼稻>梗稻。6.一定浓度的人工合成“稻酮”能明显地引起蚁螟的嗅觉反应。  相似文献   

黄瓜白粉病抗性遗传机制的研究   总被引：13，自引：1，他引：13  

张素勤  顾兴芳  张圣平  邹志荣 《园艺学报》2005,32(5):899-901

 采用多世代联合分析方法, 通过3个抗感杂交组合研究了黄瓜白粉病抗性的遗传规律。结果表明, 3个组合的最适遗传模型皆是两对加性- 显性- 上位性主基因+加性- 显性- 上位性多基因模型(E2120模型) 。组合Ⅰ的主基因遗传率为64.26% ～95.47% , 两对主基因感病相对抗病为部分显性, 两主基因的加性效应及第二主基因的显性效应较大, 两主基因的加性×显性互作效应也较大。组合Ⅱ和组合Ⅲ两主基因的遗传率分别为95.35%和96.04% , 两主基因的加性效应、显性效应和显性度较为相近。  相似文献   

大豆黄酮对奶牛血清钙、磷及葡萄糖水平的影响     

刘德义  顾有方  陈会良  商常发  汪东胜  王锐刚 《中国饲料》2005,(4):20-21

本研究选用40头胎次、产奶量、泌乳期相近的中国荷斯坦奶牛随机分成4组(n=10),试验组奶牛日粮中分别添加45、60和75mg/kg大豆黄酮,在试验前及试验开始后第10天、第20天和第30天颈静脉采血,测定4组奶牛血清钙、磷和葡萄糖水平。结果表明:与对照组相比较,试验1组中血清钙、磷和葡萄糖变化均不显著(P>0.05);试验2组仅血清钙在第30天时显著高于对照组(P<0.05);试验3组第10天和20天时血清钙水平显著高于对照组(P<0.05),第30天时血清钙水平极显著高于对照组(P<0.01),而血糖水平仅第30天显著高于对照组(P<0.05)。  相似文献   

Characteristics for Practical Use of Attenuated Isolate UA-Fukushima of <Emphasis Type="Italic">Tomato mosaic virus</Emphasis>     

Tsutomu MATSUMOTO  Yuichiro NARA  Hiromitsu FURUYA  Harumi TAKAHASHI  Kiichi TAIRAKO  Hideki YAMAMOTO 《Journal of General Plant Pathology》2002,68(4):382-384

L₁₁A-Fukushima (L₁₁A-F) derived from attenuated isolate LuA of Tomato mosaic virus (ToMV) has the highest ability to cross protect against virulent ToMV among LuA and its derivatives and is stably inherited. Growth, yield, fruit quality and symptom attenuation of inoculated tomato plants did not differ significantly between L₁₁A-F and L₁₁A. The infectivity of progeny viruses in tomato infected with LuA-F was less than 4% of that with virulent ToMV. From these results, L₁₁A-F appears to possess the properties necessary for practical use. To manage L₁₁A-F strictly, a PCR-based assay to detect trace contamination of virulent ToMV in L₁₁A-F preparations was established. Received 10 June 2002/ Accepted in revised form 30 October 2002  相似文献   

Effects of Latent Infection of Stock Plants and Abundance of Thrips on the Occurrence of <Emphasis Type="Italic">Tomato spotted wilt virus </Emphasis>in Chrysanthemum Fields     

Shohei MATSUURA  Shigeru HOSHINO  Hideaki HAYASHI  Tetsuyuki KOHGUCHI  Kyoji HAGIWARA  Toshihiro OMURA 《Journal of General Plant Pathology》2002,68(1):99-102

DAS-ELISA proved to be reliable enough to detect a latent infection by Tomato spotted wilt virus (TSWV) in asymptomatic stock plants of chrysanthemum. A high density of Frankliniella occidentalis, the predominant vector, in the presence of latently infected stock plants resulted in a high incidence of disease in the chrysanthemum production field. The incidence of disease was low when the vector thrips were not abundant in spite of the presence of latently infected stock plants. These results suggest that an infestation of the vector thrips causes severe secondary spread of TSWV originating from latently infected stock plants in chrysanthemum production fields. Received 27 July 2001/ Accepted in revised form 27 November 2001  相似文献   

草莓成熟过程中NAD激酶、NADP磷酸酶活性   总被引：1，自引：1，他引：1  

顾采琴  关军锋  席玙芳  李广敏 《园艺学报》2002,29(6):575-576

 研究了‘春星’草莓果实成熟时NAD 激酶、NADP 磷酸酶活性及NAD 激酶部分特性。结果表明, NAD 激酶和NADP 磷酸酶活性在果实绿色期到乳白期升高, 粉红期下降, 全红期又再次升高。NAD 激酶可被Ca²⁺ 强烈抑制, 被EGTA (Ca²⁺专一性螯合剂) 激活。随着成熟进程, NAD 激酶对ATP 的依赖性增加。  相似文献   

少刺型黄瓜新品种中农9号的选育     

顾兴芳  方秀娟  张天明 《中国蔬菜》2002,1(6):23-25

中农 9号黄瓜是用自交系 183和 185配制而成的少刺、短瓜型高产多抗一代杂种。中早熟 ,生长势强 ,耐低温弱光性好。抗黑星病、枯萎病、细菌性角斑病 ,中抗霜霉病等。每 6 6 7m2 产量 75 0 0～ 15 0 0 0kg。适宜日光温室、春棚及秋棚延后栽培 ,以日光温室越冬嫁接栽培效果最好。已在山东莱西、莱阳、青岛、寿光及江苏等地推广 10 0 0hm2 以上。  相似文献   

Distribution of citrus viroids and <Emphasis Type="Italic">Apple stem grooving virus</Emphasis> on citrus trees in Japan using multiplex reverse transcription polymerase chain reaction     

Takao Ito  Nobuyuki Namba  Tsutae Ito 《Journal of General Plant Pathology》2003,69(3):205-207

  相似文献   

Indole-3-acetic acid biosynthesis in <Emphasis Type="Italic">Aciculosporium take</Emphasis>, a causal agent of witches' broom of bamboo     

Eiji Tanaka  Chihiro Tanaka  Atsushi Ishihara  Yasumasa Kuwahara  Mitsuya Tsuda 《Journal of General Plant Pathology》2003,69(1):1-6

 Aciculosporium take (Ascomycota; Clavicipitaceae) is a causal agent of witches' broom of bamboo plants. The symptoms of this disease are believed to be induced by plant hormones, particularly auxins. Indole-3-acetic acid (IAA) was identified in cultures of this fungus in an l-tryptophan-supplemented liquid medium. IAA production was confirmed on 30 isolates of A. take from various hosts and locations at levels up to 1 mg/l. The biosynthetic pathway of IAA in A. take culture was examined by analyzing intermediate products and by feeding experiments. The results showed that the indole-3-pyruvic acid pathway (l-tryptophan → indole-3-pyruvic acid → indole acetaldehyde → IAA) was the dominant pathway in A. take. Received: June 3, 2002 / Accepted: July 25, 2002  相似文献   

Inconspicuous restraint of rice seedling growth by root-infecting fungi in soil of a rice paddy field     

Hiromitsu Furuya  Tsutomu Matsumoto  Shin-ichi Fuji  Hideki Naito 《Journal of General Plant Pathology》2003,69(2):115-119

 Rice seedling growth, estimated by plant height and root development and discoloration, was better in pasteurized soil than in unpasteurized soil obtained from a flooded rice field. Rice seedlings also grew better in sterilized soil modified by adding roots harvested from the pasteurized soil than in soil modified by adding roots harvested from the unpasteurized soil. The results demonstrate that seedling growth in the rice field soil was inhibited by soil microorganisms, even though no typical symptoms such as seedling blight or damping-off appeared. Pythium aristosporum is suggested to be involved in the inhibition. Thus, it appears that inconspicuous restraint of rice seedling growth could occur in soils of rice paddy fields. Received: May 20, 2002 / Accepted: October 16, 2002 Acknowledgments The authors thank Dr. T. Ichitani, former professor at Osaka Prefectural University, for providing an isolate of Pythium aristosporum for comparison, and Mr. Mitsuaki Sato of Akita Prefectural College of Agriculture for technical assistance.  相似文献