水稻细穗形态发生与顶端分生组织的研究

应用“铸模”扫描电镜法和组织切片技术对水稻幼穗的形态发生过程和顶端分生组织进行了系统而细致的研究。研究表明：从营养生长放到生殖生长早期,水稻生长锥发生了显著的变化。根据苗端分生组织中原基分化的民生将水稻幼穗早期起源和发育过程分为共顶端分生组织期,小穗顶端分生组织期、花顶 端分生组织期,在这３个大的发育时期又根据每一发育时期中的原基分生组织生长发育的程度及先后顺序分别又可分为：花序０期、花序Ⅰ期、花     

光（温）敏核雄性不育水稻育性转换中幼穗和花药的某些生理指标变化

光（温）敏核雄性不育水稻（Ｐｈｏｔｏｐｅｒｉｏｄ／ｔｅｍｐｅｒａｔｕｒｅ－ｓｅｎｓｉｔｉｖｅｇｅｎｉｃｍａｌｅ－ｓｔｅｒｉｌｅｒｉｃｅ,简称Ｐ／ＴＧＭＲ）８９０２５和培矮６４ｓ在秋季从不育阶段经半不育阶段向可育阶段转变进程中,对其花粉母细胞形成期（Ⅴ）、花粉母细胞减数分裂期（Ⅵ）的幼穗和成熟花药（Ⅷ）中过氧化物酶（Ｐｅｒｏｘｉｄｓｅ,简称ＰＯＤ）、超氧物歧化酶（Ｓｕｐｅｒｏｘｉｄｅｄｉｓｍｕｔａｓｅ,简称ＳＯＤ）．和过氧化氢酶（Ｃａｔａｌａｓｅ,简称ＣＡＴ）活性测定表明,幼穗和花药相同发育时期的酶活性随正常花粉的比率升高而增加,但以成熟花药中增加最多．并伴有丙二醛（Ｍａｌｏｎａｌｄｅｈｙｄｅ,简称ＭＤＡ）含量减少．表明自由基代谢的变化可能与光（温）敏核雄性不育水稻花粉败育有关,且自由基代谢变化在幼穗发育中期即已开始．     

糖蜜草（Melinis minutiflora Beauv．）幼穗分化发育．及花和果实形态的研究

本文对糖密草（ＭｅｌｉｎｉｓｍｉｎｕｔｉｆｌｏｒａＢｅａｕｖ．）的幼穗分化发育及花和果实的形态作了研究,将幼穗分化发育过程划分为以下九个时期：第一苞原基形成期;第一次枝梗原基形成期;第二、三次枝梗原基形成期;小穗及颖花原基形成期;雌、雄蕊原基形成期;花粉母细胞形成期;花粉母细胞减数分裂期;花粉充实期;花粉成熟期。全过程历时约需４２ｄ．从抽穗到颖果成熟约需５０ｄ。糖蜜草的花序为圆锥花序。每花序有可育花２０００—３０００朵．小穗是由小穗轴、内外颖片、不育花外稃和小花构成。小花包括有内外稃各一片、一鳞被、雄蕊三枚和一枚雌蕊,颖果千粒重为９１ｍｇ。     

苯酚在蚕桑生态系统中的积累和迁移

苯酚在蚕桑生态系统中的积累和迁移潘如圭,吴长年,陈为民,管竟芳,王静江,陈德梅（江苏省植物研究所南京２１００１４）（江苏省浒墅关蚕种场）ＡｃｃｕｍｎｕｌａｔｉｏｎａｕｄＭｉｇｒａｔｉｏｎｏｆＰｈｅｎｏｌｉｎＳｅｒｉｃｕｌｔｕｒａｌＥｃｏｓｙｓｔｅｍ．...     

小麦秸秆的生化他感效应

小麦秸秆的生化他感效应马永清,毛仁钊,刘孟雨,刘小京,张玉铭（中国科学院石家庄农业现代化研究所,０５００２１）ＡｌｌｅｌｏｐａｔｈｉｃＥｆｆｅｃｔｓｏｆＷｈｅａｔＳｔｒａｗ￥ＭａＹｏｎｇｑｉｎｇ;ＭａｏＲｅｎｚｈａｏ;ＬｉｕＭｅｎｙｕ;ＬｉｕＸｉａｏｊｉｎｇ（ＳｈｉｊｉａｚｈｕａｎｇＩｎｓｔｉｔｕｔｅｏｆＡｇｒｉｃｕｌｔｕｒａｌＭｏｄｅｒｎｉｚａｔｉｏｎ,ＡｃａｄｅｍｉａＳｉｎｉｃａ,０５００２１）．ＣｈｉｎｅｓｅＪｏｕｒｎａｌｏｆＥｃｏｌｏｇｙ,１９９３,１２（５）;３６－３８。Ｔｈｅｗｏｒｌｄ－ｗｉｄｅｒｅｓｅａｒｃｈｅｓｏｎａｌｌｅｌｏｐａｔｈｉｃｅｆｆｅｃｔｓｏｆｗｈｅａｔｓｔｒａｗａｒｅｓｕｍｍａｒｉｚｅｄａｎｄｔｈｅｃｕｒｒｅｎｔｓｉｔｕａ－ｔｉｏｎｏｎｉｓｏｌａｔｉｏｎａｎｄｉｄｅｎｔｉｆｉｃａｔｉｏｎｏｆａｌｌｅｌｏｃｈｅｍｉｃａｌｓｆｒｏｍｉｔｉｓｐｒｅｓｅｎｔｅｄ．ｗｈｉｃｈｗｉｌｌｇｉｖｅａｇｕｉｄａｎｃｅｉｎｏｕｒｔｈｅｏｒｅｔｉｃａｌｓｔｕｄｙａｎｄｐｒｏｄｕｃｔｉｖｅｐｒａｃｔｉｃｅ。Ｋｅｙｗｏｒｄｓ：Ａｌｌｅｌｏｐａｔｈｙ,ａｌｌｅｌｏｃｈｅｍｉｃａｌｓ,ｗｈｅａｔｓｔｒａｗ。     

新疆阿尔泰山驼鹿的初步考察

新疆阿尔泰山驼鹿的初步考察ＡＰＲＥＬＩＭＩＮＡＲＹＩＮＳＰＥＣＴＩＯＮＯＮＴＨＥＥＬＫ（ＡＬＣＥＳＡＬＣＥＳ）ＩＮＸＩＮＪＩＡＮＧＡＬＴＡＩＭＯＵＮＴＡＩＮＫｅｙｗｏｒｄｓＸｉｎｊｉａｎｇ;Ｅｌｋ（Ａｌｃｅｓａｌｃｅｓ）１９９４年７－８月,我们受新疆...     

河南开封淀粉厂生态经济示范工程结构模型与投入产出模型的研究

河南开封淀粉厂生态经济示范工程结构模型与投入产出模型的研究刘玉萃,赵伟（河南农业大学,郑州４５０００２）ＳｔｒｕｃｔｕｒａｌＭｏｄｅｌａｎｄＩｎｐｕｔ－ＯｕｔｐｕｔＭｏｄｅｌｏｆＥｃｏｌｏｍｉｃａｌＤｅｍｏｎｓｔｒａｔｉｏｎＰｒｏｊｅｃｔｉｎＫａｉｆｅｎｇＳｔａｒｃｈＦａｃ－ｔｏｒｙｏｆＨｅｎａｎＰｒｏｖｉｎｃｅ￥．ＬｉｕＹｕｃｕｉ;ＺｈａｏＷｅｉ（ＨｅｎａｎＡｇｒｉｃｕｌｔｕｒａｌＵｎｉｗｒｓｉｔｙ,Ｚｈｅｎｇｚｈｏｕ４５０００２）．Ｃｈｉ－ｎｅｓｅＪｏｕｒｕａｌｏｆＥｃｏｌｏｇｙ,１９９３,１２（２）：６１－６５．Ｂａｓｅｄｏｎｔｈｅｉｎｔｅｇｒｉｔｙｏｆｓｙｓｔｅｍａｎｄｒｅｌａｔｉｏｎｓｈｉｐｂｅｔｗｅｅｎｖａｒｉｏｕｓｓｕｂｓｙｓｔｅｍｓａｎｄｅｍｐｌｏｙｉｎｇｔｒａｎｓｉｔｉｏｎａｌｓｔｒｕｃｔｕｒａｌｍｏｄｅｌ,ｔｈｅｍｕｌｔｉｌｅｖｅｌｇｒａｄｉｅｎｔｓｔｒｕｃｔｕｒｅｓｏｆｓｙｓｔｅｍａｒｅｆｏｕｎｄｆｒｏｍｔｅｍｐｏｒａｌａｎｄｓｐａｔｉａｌｄｉｍｅｎ－ｓｉｏｎｓ．Ａｃｃｏｒｄｉｎｇｔｏｔｈｅｄｉｓｓｉｐａｔｅａｎｄｒｅｐｒｏｄｕｃｔｉｖｅｆｅａｔｕｒｅｓｏｆｅｃｏｓｙｓｔｅｍａｎｄｕｓ     

重金属在土壤—水稻系统中的行为特性

重金属在土壤＿水稻系统中的行为特性王新吴燕玉（中国科学院沈阳应用生态研究所,１１００１５）ＢｅｈａｖｉｏｕｒＰｒｏｐｅｒｔｙｏｆＨｅａｖｙＭｅｔａｌｓｉｎＳｏｉｌ＿ＲｉｃｅＳｙｓｔｅｍ．ＷａｎｇＸｉｎ,ＷｕＹａｎｙｕ（ＩｎｓｔｉｔｕｔｅｏｆＡｐｐｌ...     

6－Dimethylaminopurine（6－DMAP） Spontaneously Induces Interphase Transition Of Metaphase Mouse Oocytes

６－Ｄｉｍｅｔｈｙｌａｍｉｎｏｐｕｒｉｎｅ（６－ＤＭＡＰ）ＳｐｏｎｔａｎｅｏｕｓｌｙＩｎｄｕｃｅｓＩｎｔｅｒｐｈａｓｅＴｒａｎｓｉｔｉｏｎＯｆＭｅｔａｐｈａｓｅＭｏｕｓｅＯｏｃｙｔｅｓ￥ＳＵＮＱｉｎｇ－ｙｕａｎ（孙青原）;ＧＡＯＳｈａｏ－ｒｏｎｇ（高...     

浸润垄作稻田土壤生态系统的研究

浸润垄作稻田土壤生态系统的研究魏朝富,高明,车福才,邓春（西南农业大学土化系重庆６３０７１６）ＡＳｔｕｄｙｏｎＩｎｆｉｌｔｒａｔｅｄ－ＲｉｄｇｅｄＰａｄｄｙＳｏｉｌＥｃｏｓｙｓｔｅｍ￥．ＷｅｉＣｈａｏｆｕ;ＧａｏＭｉｎｇ,ＣｈｅＦｕｃｈａｉ;ＤｅｎｇＣｈｕｎ（ＳｏｕｔｈｗｅｓｔＡｇｒｉｃｕｌｌｕｒａｌＵｎｉｖｅｒｓｉｔｙ,）．ＣｈｉｎｅｓｅＪｏｕｒｎａｌｏｆＥｃｏｌｏｇｙ,１９９３,１２（３）：２６－３０;Ｔｈｉｓｐａｐｅｒｄｅａｌｓｗｉｃｈａｎｉｎｆｉｌｔｒａｔｅｄ－ｒｉｄｇｅｄｐａｄｄｙｓｏｉｌｅｃｏｓｙｓｔｅｍｗｈｉｃｈｉｓｃｏｎｓｔｒｕｃｔｅｄｂｙｒｉｄｇｉｎｇａｎｄｃｏｎ－ｔｉｎｕｏｕｓｆｕｒｒｏｗｉｎｆｉＩｔｒａｔｉＯｎｉｒｒｉｇａｔｉｏｎ,ＣｏｍｐａｒｉｎｇｗｉｔｈｌｅｖｅｌｉｎｆｉＩｔｒａｔｅｄｐａｄｄｙｓｏｉｌｅｃｏｓｙｓｔｅｍ,ｔｈｉｓｅｃｏｓｙｓ－ｔｅｍｈａｓｃｏｅｘｉｓｔｅｄｇａｓ－ｌｉｑｕｉｄ,ｇａｓ－ｓｏｌｉｄａｎｄｌｉｑｕｉｄ－ｓｏｌｉｄｉｎｔｅｒｆａｃｅｓ,ｅｎｌａｒｇｅｓｓｏｉｌｓｕｒｆａｃｅｂｙ３８％ａｎｄｉｎｃｒｅａｓｅｓｃｕＩｔｉｖａｔｅｄｌａｙｅｒｂｙ５－１０ｃｍ．     

Recent advances in the study of Kaposi's sarcoma-associated herpesvirus replication and pathogenesis

It has now been over twenty years since a novel herpesviral genome was identified in Kaposi's sarcoma biopsies. Since then, the cumulative research effort by molecular biologists, virologists, clinicians, and epidemiologists alike has led to the extensive characterization of this tumor virus, Kaposi's sarcoma-associated herpesvirus(KSHV; also known as human herpesvirus 8(HHV-8)), and its associated diseases. Here we review the current knowledge of KSHV biology and pathogenesis, with a particular emphasis on new and exciting advances in the field of epigenetics. We also discuss the development and practicality of various cell culture and animal model systems to study KSHV replication and pathogenesis.     

A Unique Protease Cleavage Site Predicted in the Spike Protein of the Novel Pneumonia Coronavirus (2019-nCoV) Potentially Related to Viral Transmissibility

正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases     

Curcuminoids as inhibitors of thioredoxin reductase: A receptor based pharmacophore study with distance mapping of the active site

Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable potent antiproliferative synthetic drugs.     

The structure, reproduction and taxonomy of Vidalia and Osmundaria (Rhodophyta, Rhodomelaceae)

Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera.     

New or rare chromosome counts in Artemisia L. (Asteraceae, Anthemideae) and related genera from Kazakhstan

Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted.