横斑腹小鸮一新亚种—杂斑腹小鸮(鸮形目:鸱鸮科)

在横断山区鸟类考察过程中,发现采自四川宝兴县硗碛和雅江县八角楼的两号小鴞属标本与原记录的种类有显著差异,经研究认为是横斑腹小鴞(Athene brama)的一新亚种,命名为: 横斑腹小鴞 新亚种—杂斑腹小鴞Athene brama poikila Subsp.nov. 正模标本 雄性成鸟(采集号6079),1964年12月6日,采自四川省宝兴县的硗碛,海拔高度2,200米。标本保存在四川农业大学。     

植物向地性的一种新解释

以一种新观点（假设）解释植物的向地性。新观点主要内容：植物的茎在横截面上受到压应力时，生长快；受到拉应力时，则生长慢。根对应力的反应与茎相反，反应最敏感的部位是茎尖、根尖。新观点简称为应力的植物效应。     

High levels of arbuscular mycorrhizal fungus colonization on Medicago truncatula reduces plant suitability as a host for pea aphids (Acyrthosiphon pisum)

This study sheds light on a poorly understood area in insect-plant-microbe interactions,focusing on aphid probing and feeding behavior on plants with varying levels of arbuscular mycorrhizal(AM)fungus root colonization.It investigates a commonly occurring interaction of three species:pea aphid Acyrthosiphon pisum,barrel medic Medicago truncatula,and the AM fungus Rhizophagus irregularis,examining whether aphid-feeding behavior changes when insects feed on plants at different levels of AM fungus colonization(42% and 84% root length colonized).Aphid probing and feeding behavior was monitored throughout 8 h of recording using the electrical penetration graph(EPG)technique,also,foliar nutrient content and plant growth were measured.Summarizing,aphids took longer to reach their 1st sustained phloem ingestion on the 84% AM plants than on the 42% AM plants or on controls.Less aphids showed phloem ingestion on the 84% AM plants relative to the 42% AM plants.Shoots of the 84% AM plants had higher percent carbon(43.7%)relative to controls(40.5%),and the 84% AM plants had reduced percent nitrogen(5.3%)relative to the 42% AM plants(6%).In conclusion,EPG and foliar nutrient data support the hypothesis that modifications in plant anatomy(e.g.,thicker leaves),and poor food quality(reduced nitrogen)in the 84% AM plants contribute to reduced aphid success in locating phloem and ultimately to differences in phloem sap ingestion.This work suggests that M.truncatula plants benefit from AM symbiosis not only because of increased nutrient uptake but also because of reduced susceptibility to aphids.     

紫晶香蘑栽培生物学研究

紫晶香蘑栽培生物学研究卢成英，李鹄鸣，钟以举（湖南省吉首大学生态研究所４１６０００）ＢｉｏｌｏｇｉｃａｌＲｅｓｅａｒｃｈｏｎＬｅｐｉｓｔａｓｏｒｄｉｄａＣｕｌｔｉｖａｔｉｏｎ．￥Ｌｕｃｈｅｎｇｙｉｎｇ；ＬｉＨｕｍｉｎｇ；ＺｈｏｎｇＹｉｊｕ（Ｉｎ－ｓｔ...     

满江红离体培养和种质资源留存

InvttroPropagationandGermplasmResourcesConservationofAzollaSHUIMao－Xing，MAOMet－Fei，CHENDe－Fu，LIZhuo－Xin（S0d乙．PlertdlzerInddme，Zhej。gAfxFw77lv叶Agri‘？1，Lll，Tal，Bhathe310021）1植物名称满江红8个品种：AHXt（fd。？1－o：）uws、A。。…帅、A。。rof。。tana、A，。伽a、A·mexl‘？，zna、AnndZ‘：j，z、Aplnnata、Aif）l‘）ricata。2材料类别带5～8幼叶的茎尖。3培养条件培养基（自行设计，定名浙农9401）为无机盐（mg·L卜：NaH。PO；·ZH。O100＼K2504SO、CSC1256、MgSO；·7…     

自发性高血压大鼠主动脉α_(1B)及α_(1D)肾上腺素受体第三细胞内环不存在点突变

我们以前的实验显示自发性高血压大鼠（SHR）离体主动脉磷酸肌醇蓄积在无激动剂存在的基础状态下就显著增高。根据G蛋白偶联受体固有活性假说，推测SHR主动脉中介导肌酸磷脂水解的主要受体－α1D和α1B-肾上腺素受体的第三细胞内环可能存在点突变。本实验通过PCR－SSCP鉴定，表明上述突变并不存在。从而提示SHR主动脉磷酸肌醇蓄积基础水平增加并非因α1D和α1B-肾上腺素受体第三细胞内环区域突变所引起的受体固有活性所致。