南昌近郊辣椒两种炭疽病菌的初步研究     

黄齐望  陈菊芳 《植物保护学报》1964,3(3):317-318

1962年秋,作者等在南昌近郊,从感病长果种辣椒的果上,分离到两种炭疽病菌。一种分生孢子为椭圓形(以下簡称G菌),病斑圆形或椭圓形,凹陷,灰綠色或黄色,以后变棕色。另一种分生孢子为鐮刀形(以下簡称V菌),病斑不定形,暗棕色至黑色。这两种病菌,在馬鈴薯、洋菜培养基上都能形成孢子,且对辣椒都有寄生性。  相似文献   

颗粒剂防治玉米钻心虫的研究     

郑炳宗  黄书针 《植物保护学报》1965,4(2):133-142

1962年在北京夏玉米上用顆粒剂防治玉米钻心虫的結果表明:心叶末期施5％DDT顆粒剂,防治一次,每株2克,在一般年份,从产量上来看是很有利的。同时对药剂残效,幼虫在玉米不同生育期植株上的分布,以及顆粒剂在心叶期施药至抽雄后在植株上的分布测定,并結合顆粒剂小区防治試驗。分析結果说明:心叶末期施药,影响药效的主要原因,不是5％DDT残效的問題,而是抽雄后药剂在植株上部分布較少,尤其是包在雄穗节外的第一叶腋没有药,而此时期,幼虫在植株上部分布較多,同时DDT速效也不如666。  相似文献   

Altered adenosine triphosphatase activities in pigs with naturally occurring hypertrophic cardiomyopathy     

K-S. Dai  C-S. Liang  Y. T. Ch'iu  P-C. Yang  I. C. Cheng 《Veterinary research communications》1995,19(2):115-125

The purpose of this study was to determine whether myocardial adenosine triphosphatase (ATPase) activities were reduced in pigs with naturally occurring hypertrophic cardiomyopathy (HCM). The selection of hearts for the HCM and the normal control groups depended on histological examination. Specific ATPase activity and 5-nucleotidase activity were measured in left ventricular myocardium obtained from HCM (n=7) and normal control (n=7) animals. The histological features of HCM included marked disorientation of muscle cells, thickening of the intramural coronary arterial wall with a narrowed lumen, endocardial fibrosis and myocardial fibrosis. The HCM group showed significant increases in both heart weight (32%) and heart weight to body weight ratio (46%). The total ATPase activity in crude homogenates from the HCM group was significantly decreased by 16%. Azide-sensitive ATPase (mitochondrial ATPase) activity, ouabain-sensitive ATPase (Na⁺,K⁺-ATPase) activity, basal Mg²⁺-ATPase activity and Ca²⁺-ATPase activity were all significantly decreased by 18%, 30%, 20% and 50%, respectively. In contrast, no significant decrease was found in the mean values for 5-nucleotidase activity. These results suggest that myocardial ATPase activities are suppressed in pigs with naturally occurring HCMAbbreviations ATP adenosine triphosphate - gww grams wet weight - HCM hypertrophic cardiomyopathy - Pi inorganic phosphate  相似文献   

The dynamics of estuaries     

Cheng RT 《Science (New York, N.Y.)》1979,203(4377):260

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The in vivo sensitivity of ATPases to DDT,DDE, and physical immobilization in American cockroaches     

L.K. Cutkomp  D. Desaiah  E.Y. Cheng  E.V. Vea  R.B. Koch 《Pesticide biochemistry and physiology》1976,6(3):203-208

American cockroaches injected with sublethal doses of DDT (0.75 μg/roach) at 5-day intervals showed a 40% reduction in oligomycin-sensitive Mg²⁺ATPase from muscle homogenates, and a 23% reduction of Na⁺-K⁺ATPase from nerve cords. Thus, the maximum effect measured occurred with the same enzyme and tissue as determined from in vitro studies. The metabolite, DDE, used at 15 μg per roach, gave no significant change in activity of the ATPase system following injection. In contrast, high single doses of DDT (7.5 μg/roach) and 100 μg DDE and dicofol per roach caused over 30% increase in oligomycin-sensitive Mg²⁺ATPase of muscle and a 10–15% increase in Na⁺-K⁺ATPase of nerve cords measured 24 and 48 hr later. While a similar response was observed for Mg²⁺ATPase activities in cockroaches that were immobilized, the increase in enzyme activities were much greater than that caused by the pesticides.  相似文献   

高寒牧区牧鸡鸭治蝗效果试验   总被引：3，自引：1，他引：3  

颜生林韩启龙  苏庆义吉汉忠 张国民 《四川草原》2005,(4):52-54

在青海湖北岸高寒牧区利用人工饲养的鸡鸭进行放牧防治草原蝗虫。结果表明,在60d的防治期内,牧鸡鸭平均灭治效果达91.4%,为人工利用天敌治虫技术在高寒牧区的应用提供了依据。  相似文献   

草莓杯装软罐头的研制     

程小爱  杨剑婷  张海平 《山西果树》2005,(3):6-8

试验对杯装草莓罐头的工艺进行了研究。结果表明,烫漂的工艺为75 ℃、4 min(分钟);注液汤汁的配比为白砂糖25 %、柠檬酸0.3 %、氯化钙0.2 %;杀菌工艺为7.5 kGy辐射杀菌。  相似文献   

苹果采前落果与内源激素的关系   总被引：1，自引：0，他引：1  

孟玉平  曹秋芬  樊新萍  程恩明  孙俊杰 《果树学报》2005,22(1):6-10

为了探讨苹果采前落果与内源激素之间的关系,在采前8周间定期测定了不同苹果品种的果柄、果台和离层形成部位组织中IAA、ABA含量;在采收前20d内定期测定了离层部位组织中细胞壁分解酶(Cellulase)的活性;在收获期测定了果实乙烯的发生量。结果表明:不同品种果柄、果台和离层部位组织中IAA和ABA含量变化有差异,但它们变化的总趋势相似,都是随着果实成熟IAA含量下降,而ABA含量上升;不同品种的成熟果实中乙烯发生量有很大差异,以落果多的品种显著大于落果少的品种;采前落果重的品种离层部位组织中细胞壁分解酶的活性在果实成熟期急剧增加。由于果实进入成熟阶段后,IAA含量下降,ABA含量升高,ABA/IAA之间的相对平衡被打破,高ABA/IAA以及高乙烯会刺激离层组织中细胞壁分解酶的活性增高,进而促进离层形成,这可能是导致落果发生的原因。  相似文献   

荔枝生产相关的水分生理指标远程监测研究   总被引：2，自引：0，他引：2  

赵晓勤  宋世文  李建国  谢世恭  王泽槐  李楚彬  季作梁 《果树学报》2005,22(6):644-648

利用植物远程监测系统对荔枝园中的大气温湿度、土壤湿度、光照强度、大气蒸汽压差(VPD)等环境因子和茎干直径微变化、果实生长、叶片温度等树体生理指标进行了监测,发现该系统能准确及时并无伤害地记录他们的实时和周期性变化。据获得的数据初步表明,当果实处于快速膨大期,主茎的加粗生长明显缓慢,一旦果实采收后,茎干加粗生长则有一个迅速上升的变化;当土壤湿度高于33%(v/v)时,主茎的生长受到明显的抑制;VPD白天上升,夜间下降,当夜间VPD始终高于0,就形成所谓的“夜间干燥”,VPD的这种变化对荔枝主茎和果实的生长以及叶气温差(LATD)都有较大的影响,如主茎和果实的日间收缩量随VPD的增大而增大,夜间空气干燥不但抑制了主茎生长,也使日最大LATD下降。据此认为,果实和茎干的生长之间存在竞争关系,土壤湿度过高或者夜间空气干燥对荔枝的生长不利。  相似文献   

Ca~(2+)-ATPase抑制剂对采后草莓呼吸速率和花青苷含量的影响     

关军锋  及华  冯云霄  孙玉龙  李丽梅 《果树学报》2005,22(6):712-714

用Ca2+-ATPase抑制剂钒酸钠(SO)和曙红(EB)浸泡处理转红期草莓果实(cv.Darselect)后表明,2者能提高果实呼吸速率,迅速促进外层果肉的花青苷生成,增加其可溶性糖含量,髓部果肉的花青苷生成和可溶性糖的变化较慢,而对果实的失重率影响不大。因此,Ca2+-ATPase抑制剂具有促进果实成熟衰老的作用。  相似文献