稻纵卷叶螟对杂交水稻及常规水稻的生态反应

稻纵卷叶螟对杂交水稻及常规水稻的生态反应钱希（国营黄海农场,江苏省响水县２２４６２４）ＥｃｏｌｏｇｉｅａｌＲｅｓｐｏｎｓｅｓｏｆＲｉｃｅＣａｓｅｗｏｒｍｔｏＨｙｂｒｉｄＲｉｃｅｓａｎｄＴｒａｄｉｔｉｏｎａｌＲｉｃｅｓ￥ＱｉａｎＸｉ（ＴｈｅＳｔａｔｅＦａｒｍｏｆＹｅｌｌｏｗＳｅａ,ＸｉａｎｇｓｈｕｉＣｏｕｎｔｙ,Ｊｉａｎｇｓｕ,Ｐｒｏｖｉｎｃｅ２２４６２４）．ＣｈｉｎｅｓｅＪｏｕｒｎａｌｏｆＥｃｏｌｏｇｙ,１９９３,１２（６）：２１－２４．Ｔｏｓｔｕｄｙｔｈｅｅｆｆｅｃｔｏｆｒｉｃｅｃｕｌｔｉｖａｒｓｏｎｔｈｅｏｖｉｐｏｓｉｔｉｏｎ,ｅｍｅｒｇｅｎｃｅ,ｗｏｒｍｄｅｖｅｌｏｐｍｅｎｔａｎｄｎａｔｕｒａｌｅｎｅｍｖｐａｒａｓｉｔｉｏｎｏｆｃａｓｅｗｏｒｍａｎｄｌｏｓｓｅｓｃａｕｓｅｄｂｙｔｈｅｐｅｓｔ,ｏｂｓｅｒｖａｔｉｏｎｓｈａｖｅｂｅｅｎｍａｄｅｏｎ１６ｒｉｃｅｃｕｌｔｉｖａｒｓｉｎＨｕａｎｇｈａｉＳｔａｔｅＦａｒｍｉｎＮｏｒｔｈｅｒｎＪｉａｎｇｓｕｐｒｏｖｉｎｃｅ,ｗｈｅｒｅｃａｓｅｗｏｒｍｇｒａｄｕａｌｌｙｂｅｃｏｍｅｍｏｒｅａｎｄｍｏｒｅｖｉ－ｏｌｅｎｔｓｉｎｃｅｔｈｅｃｈａｎｇｅｓｉｎｃｕｌｔｉｖａ     

胱天蛋白酶（caspase）的前结构域

胱天蛋白酶 (ｃａｓｐａｓｅ)是白细胞介素 1β转化酶(ｉｎｔｅｒｌｅｕｋｉｎ 1βｅｎｚｙｍｅ ,ＩＣＥ)家族的总称 ,Ｃａｓｐａｓｅ(ｃｙｓｔｅｉｎｅａｓｐａｒｔａｔｅ ｓｐｅｃｉａｌｐｒｏｔｅａｓｅｓ)的含义是该类蛋白酶的活性部位为极为保守的半胱氨酸 (ｃｙｓｔｅｉｎｅ)残基 (取第一个字母“ｃ”) ,又特异性切割底物的天冬氨酸 ,用“ａｓｐａｓｅ”表示 ,简称ｃａｓｐａｓｅ ,该酶在细胞凋亡过程中起关键作用 ,是目前研究的热点。现已发现的ｃａｓｐａｓｅ有 14种 ,它们均以无活性的酶原的形式存在 ,包括一个Ｎ末端前结构域 (ｐ…     

细胞衰老揭秘

细胞衰老揭秘为研究Ｗｅｒｎｅｒｓ综合征发病的基因机制,分子生物学家Ｇｕａｒｅｎｔｅ和Ｄａｖｉｄｓｉｎｃｌａｉｒ利用酵母Ｓａｃｃｈａｒｏｍｙｃｅｓｃｅｒｅｖｉｓｉａｅ进行研究。这是因为Ｗｅｒｎｅｒｓ的特征是早衰,而酵母Ｓａｃｃｈａｒｏｍｙｃｅｓｃｅ...     

Cloning and expression of 5,10-Methylenetetrahydrofolate reductase (MTHFR) gene

Ｉｔｗａｓｒｅｃｅｎｔｌｙｅｖｉｄｅｎｃｅｄｔｈａｔｍｅｔａｂｏｌｉｃｄｉｓｔｕｒｂａｎｃｅｓｏｆｆｏｌｉｃａｃｉｄａｒｅｃｌｏｓｅｌｙｒｅｌａｔｅｄｔｏｃａｒｄｉｏｖａｓｃｕｌａｒｄｉｓｅａｓｅｓａｎｄｂｉｒｔｈｄｅｆｅｃｔｓ.5,10ＭＴＨＦＲｉｓａｎｉｍｐｏｒｔａｎｔｅｎｚｙｍｅｉｎｔｈｅｆｏｌｉｃａｃｉｄｍｅｔａｂｏｌｉｃｓｙｓｔｅｍ.ＤｅｃｒｅａｓｅｉｎＭＴＨＦＲａｃｔｉｖｉｔｙｍａｙｉｎｄｕｃｅｔｈｅａｐｐｅａｒａｎｃｅｏｆｈｙｐｅｒｈｏｍｏｃｙｓｔｅｉｎｅｍｉａ,ｗｈｉｃｈｍａｙｃａｕｓ…     

Plasmalemma hyperpolarity and culture of sense and antisense abp transgenic tobacco protoplasts

Ａｕｘｉｎｉｓａｔｙｐｅｏｆｐｌａｎｔｈｏｒｍｏｎｅｅｘｉｓｔｉｎｇｅｘｔｅｎｓｉｖｅｌｙ[1].Ｉｔｒｅｇｕｌａｔｅｓｍａｎｙｐｒｏｃｅｓｓｅｓｉｎｐｌａｎｔｄｅｖｅｌｏｐｍｅｎｔ[2,3].Ａｃｃｏｒｄｉｎｇｔｏｔｈｅ“ａｃｉｄｇｒｏｗｔｈｔｈｅｏｒｙ”,ａｕｘｉｎｓｔｉｍｕｌａｔｅｓａｓｅｒｉｅｓｏｆｒｅａｃｔｉｏｎａｎｄｔｈｅｎｐｒｏｍｏｔｅｓｃｅｌｌｇｒｏｗｔｈｂｙｂｉｎｄｉｎｇｔｈｅＡＢＰｌｏｃａｔｅｄｉｎｃｅｌｌｍｅｍｂｒａｎｅ[4,5].Ｔｈｅｓｔｕｄｉｅｓｏｎｔｏｂａｃｃｏｍｕｔａｎｔｅｘｈｉ…     

细胞凋亡中的关键蛋白酶—Caspase—3

在哺乳动物细胞凋亡执行阶段起重作用的一系列半胱氨酸蛋白酶基因相继被克隆。Ｃａｓｐａｓｅ－３（又称ＣＰＰ３２,Ｙａｍａ,ａｐｏｐａｉｎ）被认为是各种凋亡刺激因子激活的ｃａｓｐａｓｅ家族中的关键蛋白酶,活性ｃａｓｐａｓｅ－３可作用于一些其他ｃａｓｐａｓｅ成员,并降解凋亡细胞中的某些蛋白质。Ｃａｓｅｐａｓｅ－３抑制物是细胞凋亡抑制剂,有希望成为治疗因细胞过度死亡所致相关疾病的重要分子。     

Airborne Pollen Grains of Burdur, Turkey

Ｐｏｌｌｅｎｇｒａｉｎｓｃａｕｓｅｓｏｍｅｒｅｓｐｉｒａｔｏｒｙｓｙｓｔｅｍｄｉｓｅａｓｅｓｓｕｃｈａｓａｌｌｅｒｇｉｃａｓｔｈｍａａｎｄｈａｙｆｅｖｅｒ .Ｔｈｅｓｅｄｉｓｅａｓｅｓａｐ ｐｅａｒｅｓｐｅｃｉａｌｌｙｉｎｆｌｏｗｅｒｉｎｇｐｅｒｉｏｄｓｏｆ     

Molecular mechanism of diapause in insect (I) --Expression of diapause hormone gene and incubation temperature in embryonic stage of Bombyx mori

Ｉｎｓｅｃｔｓａｒｅｔｈｅｍｏｓｔｓｕｃｃｅｓｓｆｕｌａｎｉｍａｌｇｒｏｕｐｉｎｔｅｒｍｓｏｆｎｕｍｂｅｒｓｏｆｓｐｅｃｉｅｓ.Ａｌｔｈｏｕｇｈｍａｎｙｆａｃｔｏｒｓｍｕｓｔｃｏｎｔｒｉｂｕｔｅｔｏｔｈｅｐｒｏｆｕｓｉｏｎｏｆｉｎｓｅｃｔｓｐｅｃｉｅｓ,ｏｎｅｋｅｙｅｌｅｍｅｎｔｉｓｐｒｏｂａｂｌｙａｄｅｖｅｌｏｐｍｅｎｔａｌｐｌａｎｔｈａｔｉｎｃｏｒｐｏｒａｔｅｓｍｅｔａｍｏｒｐｈｏｓｉｓａｎｄｄｉａｐａｕｓｅ.Ｄｉａｐａｕｓｅｉｓａｃｏｍｐｌｅｘａｄａｐｔａｔｉｖｅｒｅｓｐｏｎｓｅｗｈｉｃｈｉ…     

Cloning of α-amylase gene from Schwanniomyces occidentalis and expression in Saccharomyces cerevisiae

Ａｎｏｒｇａｎｉｓｍ,Ｓ.ｃｅｒｅｖｉｓｉａｅｗｉｄｅｌｙｕｓｅｄｉｎｂｒｅｗｉｎｇ,ｂａｋｉｎｇａｎｄｉｎｅｔｈａｎｏｌｐｒｏｄｕｃｔｉｏｎｐｒｏｃｅｓｓｅｓｉｓｎｏｔａｂｌｅｔｏｈｙｄｒｏｌｙｓｅｓｔａｒｃｈ.ＴｈｕｓｔｈｅｔｒａｄｉｔｉｏｎａｌｃｏｎｖｅｒｓｉｏｎｏｆｓｔａｒｃｈｉｎｔｏｅｔｈａｎｏｌａｎｄＣＯ2ｄｅｐｅｎｄｓｏｎｔｈｅａｄｄｉｔｉｏｎｏｆｔｈｅｅｎｚｙｍｅｓｐｒｉｏｒｔｏｆｅｒｍｅｎｔａｔｉｏｎ,ｗｈｉｃｈｌｅａｄｓｔｏｌｉｑｕｉｆｉｃａｔｉｏｎａｎｄｓａｃｃｈａｒｉｆｉｃａｔ…     

落叶松人工林土壤肥力变化的研究

落叶松人工林土壤肥力变化的研究阎德仁（内蒙古林业科学研究院呼和浩特市０１００１０）ＳｏｉｌＦｅｒｔｉｌｉｔｙＶａｒｉａｔｉｏｎｓＵｎｄｅｒＡｒｔｉｆｉｃｉａｌＬａｒｃｈＦｏｒｅｓｔ￥．ＹａｎＤｅｒｅｎ（ＦｏｒｅｓｉｒｙＩｎｓｔｉｌｕｔｅｏｆＩｎｎｅｒＭｏｎｇｏｌｉａ,Ｈｕｈｈｏｔ０１００１０）．ＣｈｉｉｎｅｓｅＪｏｕｒｎａｌｏｆＥｃｏｌｏｇｙ,１９９３,１２（３）：８－１０．Ｔｈｉｓｐａｐｅｒｓｔｕｄｉｅｓｔｈｅｖａｒｉａｔｉｏｎｏｆｓｏｉｌｆｅｒｔｉｌｉｔｙｕｎｄｅｒｐｕｒｅａｒｔｉｆｉｃｉａｌｌａｒｃｈ（Ｌａｒｉｘｇｍｅｌｉｎｉｉ）ｆｏｒｅｓｔｆｒｏｍａｓ－ｐｅｃｔｓｏｆｓｏｉｌｈｕｍｕｓａｎｄｅｎｚｙｍｅａｃｔｉｖｉｔｙ．Ｗｉｔｈｉｎｃｒｅａｓｉｎｇａｇｅｏｆｆｏｒｅｓｔｓｔａｎｄ,ｓｏｉｌｆｅｒｔｉｌｉｔｙｔｅｎｄｓｔｏｄｅ－ｃｒｅａｓｅ,ｂｕｔｓｏｉｌｅｎｚｙｍｅａｃｔｉｖｉｔｙｔｅｎｄｓｔｏｉｎｃｒｅａｓｅ．Ｕｎｄｅｒｆｏｒｅｓｔｗｉｔｈ２０ｙｅａｒｓｏｆａｇｅ,ｔｈｅｃｏｎｔｅｎｔｓｏｆｓｏｉｌｈｕｍｕｓ,ｈｕｍｉｃａｃｉｄａｎｄｆｕｌｖｉｃａｃｉｄａｎｄｔｈｅｒａｔｉｏｏｆｈｕｍｉｃａｃｉｄ     

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.     

肝癌中HBV和HCV基因和抗原的分布及意义

采用原位分子杂交方法检测HCV RNA及HBV X基因;采用免疫组织化学方法研究HCV核心抗原,非结构区C33c抗原及HBxAg在肝细胞肝癌中的定位及分布.结果表明(1)HCV RNA、HBV X基因在肝细胞肝癌组织检出率分别为40%(55/136)和82%(112/136).HCV RNA定位于癌细胞的胞浆内,阳性细胞呈散在、灶状及弥漫分布三种形式;HBV X基因在肝癌细胞中的分布呈胞浆型、核型及核浆型,阳性细胞也呈上述三种分布形式;(2)HCV C33c抗原、核心抗原在肝细胞肝癌中的阳性率为81%(133/164)及86%(141/164).C33c抗原定位于癌细胞及肝细胞的胞浆内;核心抗原既定位于癌细胞核中,又可定位于胞浆中.C33c抗原阳性细胞以灶状分布为主;而核心抗原阳性细     

Comparative morphology of the carpel in the Liliaceae: Hewardieae, Petrosavieae, and Tricyrteae

The young pistils in the melanthioid tribes, Hewardieae, Petrosavieae and Tricyrteae, are uniformly tricarpellate and syncarpous. They lack raphide idioblasts. All are multiovulate, with bitegmic ovules. The Petrosavieae are marked by the presence of septal glands and incomplete syncarpy. Tepals and stamens adhere to the ovary in the Hewardieae and the Petrosavieae but not in the Tricyrteae. Two vascular bundles occur in the stamens of the Hewartlieae and Tricyrtis latifolia. Ventral bundles in the upper part of the ovary of the Hewardieae are continuous with compound septal bundles and placental bundles in the lower part. Putative ventral bundles occur in the alternate position in the Tricyrteae and putative placental bundles in the opposite. position in the Petrosavieae. The dichtomously branched stigma in each carpel of the Tricyrteae is supplied by a bifurcated dorsal bundle.