【摘 要】
:
During 1996- 1997, sixty samples were collected from apricot in Hebei Province, from which nineteen ice nucleation active bacterial strains were isolated. Nine
【机 构】
:
Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100094;College of F
论文部分内容阅读
During 1996- 1997, sixty samples were collected from apricot in Hebei Province, from which nineteen ice nucleation active bacterial strains were isolated. Nine stains were identified as Pseudomonas syringae pv. syringae by bacteriological determination, while the others were Erwinia uredovora. Assay of ice nucleation activity (INA) showed the activity of the Pseudomonas strains was higher than that of the Erwinia.According to the number of bacterial cells required to produce one ice nucleus active at - 3℃, four stains was classified as strong ones, three as medium-strong, the remainder as weak. In general, the INA of these strains were regarded as medium-strong. Under stress of Iow temperatures, treatment of INA bacteria can greatly raised relative electric conductivity of petals and permeability of cell membrane. The treated petals showed symptoms of serious frost at - 3 - - 4℃ and had supercooling points of 2 - 3℃ higher than controls. Our results demon strated that INA bacteria are one major factor to incite frost damage to apricot flowers. We may reduce frost injury to apricot during flowering phage through control of INA bacteria.
其他文献
罐式汽车是指装有罐状容器,并且通常带有工作泵,用于运输液体、气体或粉状物质,能够完成某种特殊作业的专用汽车。罐式汽车在交通运输中发挥了非常重要和不可替代的作用。罐式汽
我国档案数字化建设有助于提升档案管理工作效率,有效利用档案资源,发挥其价值,有助于社会经济发展.本文一档案数字化的内涵入手,简述了数字化档案管理的基本优势,针对数字化
The s gene of five prevalent virulent strains and one C-strain of Hog Cholera Virus were amplified by reverse transcription (RT). The amplified fragments were c
阿特拉斯·科普柯是世界领先的工业生产率解决方案提供商,在食品饮料行业,阿特拉斯·科普柯在空气压缩机行业率先提出“零级无油”的概念,并与国内外众多品牌进行了合作,例如
A new excellent cytoplasmic type of CMS line Sl0-2A in rice with typical abortion type (TAT)from Minghui 63 was obtained by in vitro culture. It possesses high
Simple sequence repeats (SSRs) were used to detect genetic variation among 21 maize(Zea mays L. ) inbred lines. Forty-three SSR primers selected from 69 primers
“上个月,我在省人民医院看病,说我是骨质增生。昨天,市一院的医生说我是骨质疏松。”一位约50多岁的职业女性走进诊室,埋怨着说“究竟是‘增生’,还是‘疏松’?我给弄糊涂了
某餐厅的张师傅有一手做馅饼的好手艺,前年他退休以后,自己开了一个“馅饼张”小饭馆专卖馅饼,远近闻名.可是时隔不久,张师傅的邻居孙某开了个饭馆,也挂出了馅饼张的牌子,专
A study on the physiological-biochemical changes of different ramie(Boehmeria Jacq. ) varieties under drought stress was carried out, the results showed that re
舌苔剥脱在西医口腔医学中可见于萎缩性舌炎与游走性舌炎两种,可于任何年龄阶段发病,多采用维生素等治疗为首选,但效果不佳.萎缩性舌炎常与维生素B族、缺铁性贫血、真菌感染