桃流胶病研究进展

流胶病为桃树生产上的主要病害之一,发生普遍,危害严重。综述了引起桃流胶病的致病菌种类,病原菌的发生与侵染规律,组织病理学研究,田间自然条件与人工接种的抗性鉴定及筛选出的抗性品种,所采取的综合防治措施,以及在抗性育种与抗病性筛选的生理生化指标方面的研究进展,并对今后的工作重点提出了建议。     

入世后我国甜樱桃面临的机遇与挑战及发展对策

甜樱桃作为一种早熟、优质、保健果品,而且种植效益较高,在国内国际都正处于发展时期。根据世界甜樱桃生产和贸易情况,指出了我国在甜樱桃科学技术与生产上与世界先进甜樱桃生产国的差距,分析了我国加入WTO之后,我国甜樱桃面临的机遇和挑战,并且机遇大于挑战。如果有适当的科技投入,我国甜樱桃产业将可克服现在科技滞后的状态,发挥我国劳动力低廉和国土辽阔的优势,迅速扩大其生产总量,提高品质,扩大出口,增加农民的收入,2015年可望形成32.4～43.2亿元的社会总产值。     

Relationship between expression of somatostatin and DNA ploidy in breast cancer

AIM: To investigate the relationship between somatostatin and the pathologic type, estrogen receptor,DNA ploidy of nuclei in tumor cells of breast cancer.METHODS: 67 cases of primary breast cancer and 25 cases of benign breast tumor were examined by immunohistochemical stretomyces avidin peroxidase method. 26 cases of breast cancer selected at random were analyzed by flow cytometry.RESULTS: Somatostatin expressed significantly higher in low malignant breast cancer than that in high malignant breast cancer (P<0.05). Most of cancers with positive staining of somatostatin were diploidy,most of cancers with negative staining were aneuploidy,there had significant difference between two groups (P<0.05).CONCLUSION: Somatostatin may delay the progress of breast cancer,and somatostatin levels in cancer tissues may become a useful indicator for assessing prognosis of patients with breast cancer.     

Study on integrin-mediated albumin microbubbles adherence to activated leukocytes

AIM:To investigate the mechanism responsible for albumin microbubbles adherence to activated leukocytes. METHODS: In vitro studies were performed in which activated or nonactivated leukocytes were incubated with albumin microbubbles and observed under microscopy. The suspensions of leukocytes and microbubbles which contained or absented of integrins were analyzed with flow cytometry.RESULTS: A minimum of 50cells were identified under transillumination. 5 min after microbubbles were incubated with leukocytes, the number of cells interacting with microbubbles was greater for activated cells than for nonactivated cells(20.30±2.67 vs 4.50±1.43, P <0.01).Microbubbles attached to the surface of activated leukocytes were phagocytosed and remained intact for up to 30min. Microbubble attachment was inhibited notably by blocking the leukocyte β₂-integrin Mac-1(P <0.01) and by VLA-4mAb slightly(P <0.05) CONCLUSION: The mechanism of albumin microbubbles attaching to and phagocytosed by leukocytes was due to β₂-integrin and VLA-4 mediation. Phagocytosed microbubbles can remain at the regions of inflammation for15 min, also responsible to ultrasound.     

Changes of myocardial glycogen content and right ventricular function in hypoxia swimming rats

AIM: To investigate the changes of myocardium glycogen content and the relation ship between changes of the myocardial glycogen content and the myocardial function. METHODS: Male Wistar rats were placed in (hypoxia rats) and made to swim in (hypoxia swimming rats) a hypobaxic chamber simulating an altitude of 5 000 m above sea level. The content of myocardium glycogens was determined by colorimetry. RESULTS: The myocardium
glycogen content of rats significantly reduced along with the prolongation of hypoxic exposure and approached to control level in hypoxia swimming rats. The myocardial function of right ventricule was improved significantly compared with control group.CONCLUSION: Moderate exercise (swimming) is beneficial to hypoxic adaptation of rats under the condition of chronic hypoxia.     

早熟优质长豇豆新品种‘鄂豇豆2 号’

 ‘鄂豇豆2号’是经有性杂交选育而成的早熟蔓生豇豆新品种。该品种荚浅绿色, 长60 cm,单荚质量18~ 24 g。早熟, 荚商品性状优良, 产量高, 对光周期反应不敏感, 田间疫病、煤霉病、病毒病发病率低, 适宜于春、夏、秋各季栽培, 已在全国大部分省份推广种植成功。     

极早熟葡萄新品种‘90- 1’

 ‘90- 1’是从‘乍娜’的芽变中选出的葡萄新品种。该品种除保持母本的优质、丰产、适合保护地栽培等优良性状外, 其最突出的特点是极早熟, 果实6 月下旬成熟, 果实发育期仅35 d。     

杜鹃花新品种‘朝晖’和‘红晕’

 ‘朝晖’杜鹃花是由大白花杜鹃和马缨花杂交选育而成, 叶面灰绿色, 顶生圆锥伞房花序, 有花10～12 朵, 花冠紫红色。‘红晕’杜鹃花是由露珠杜鹃和马缨花杂交选育而成, 叶浅绿色, 花冠漏斗状钟形, 花冠上部粉红色, 下部乳黄色, 有紫红色斑点。     

优质耐贮中华猕猴桃新品种‘丰悦’、‘翠玉’

 ‘丰悦’、‘翠玉’是从野生猕猴桃资源中选育出的优质良种, 均果大质优, 平均单果质量均为90 g 左右, 最大127. 8 g、129 g。肉质细嫩多汁, 味甜, 香气浓, 可溶性固形物含量分别达13. 5%~ 15. 8%和14. 5%~ 17. 3%, 最高达19. 0%和19. 5% , 维生素C 含量分别达840~ 1 630 和930~ 1 430 mg/ kg。果实耐贮藏, ‘翠玉’20℃下可贮藏30 d 左右。在长沙‘丰悦’9月中下旬成熟; ‘翠玉’10月上旬成熟。     

甜橙新品种‘兴国甜橙3-5’

 ‘兴国甜橙3-5 ’是从实生‘兴国甜橙’后代中选出的新品种。果皮橙黄至橙红色。果实近圆球形, 平均单果质量167. 7 g , 可溶性固形物含量13. 6% ~ 15. 1%, 总糖含量10. 3% ~ 11. 5%, 总酸含量0. 47%~ 0. 93%, 可食率79. 27%~ 80. 75%, 果汁率65. 18%~ 65. 96%, 11 月上旬成熟。