木荷属(山茶科)一新变种——扁果银木荷

报道了四川德昌县发现的山茶科(Theaceae)木荷属(Schima Reinw.)一新变种--扁果银木荷(Schima argentea Pritz.var.platycarpa Q.Luo).新变种花瓣长2～2.6 cm,宽1.6～2.2cm,内面基部被柔毛,蒴果扁球形,直径1.7～2.1cm,高1～1.3cm等特...     

广西唇柱苣苔属(苦苣苔科)一新变种——光华唇柱苣苔

记载了广西苦苣苔科Gesneriaceae一新变种——光华唇柱苣苔Chirita tribracteata、W．T.Wang var.zhuana Z．Y．Li,Q．Xing＆Y．B．Li。该变种与原变种不同在于叶大而厚,边缘具圆齿或牙齿,叶柄具宽翅,苞片宽倒卵形或倒披针形,有锯齿,花冠淡紫色,喉部具黄色纵纹。     

Aster ageratoides var. pendulus W. P. Li & G. X. Chen,a new variety of Aster (Asteraceae) from Hunan,China

Aster ageratoides var. pendulus W. P. Li & G. X. Chen, a new variety of Aster (Asteraceae) from Shimen County, northwestern Hunan, China, is described. The variety is similar to A. ageratoides var. laticorymbus (Vant.) Hand.-Mazz., from which it differs by having pendent stem, basal leaves and lower stem leaves purple beneath, stem leaves linear, hispid above, and broader phyllaries. The new variety is also possibly similar to A. ageratoides var. micranthus Ling in the linear leaves and white ligules, but differs by having the phyllaries green at apex, 1.25–1.75 mm wide, and the obvious creeping underground rhizomes.     

广西荛花属(瑞香科)一新变种——黄药白花荛花

详细描述了广西荛花属一个新变种——黄药白花荛花Wikstroemia trichotoma (Thunb.) Makino var. flavianthera S. Y. Liu。本变种与原变种不同在于侧脉较多,达11对,萼筒非肉质,花药黄色,子房棒状,无毛。     

Impatiens macrovexilla var. yaoshanensis S. X. Yu,Y. L. Chen & H. N. Qin,a new variety of Balsaminaceae from Guangxi,China

Impatiens macrovexilla Y. L. Chen var. yaoshanensis S. X. Yu, Y. L. Chen & H. N. Qin, a new variety of Balsaminaceae from Guangxi, China, is described. Variety yaoshanensis differs from the typical variety by having ovate-orbicular or ovate-oblong leaves, entire lateral sepals, an obvious auricle and entire distal lobe of the alae and visibly ridged seeds. Micromorphological characters of the pollen grains and seed surface under SEM of the two varieties also support the recognition of this taxon.     

Eugenia terpnophylla var. keralensis var. nov. (Myrtaceae) from Kerala,India

The new variety Eugenia terpnophylla Thw. viz. var. keralensis S. M. Shareef, E. S. Santhosh Kumar et Roy is described and illustrated from Kerala, India. It differs from the typical variety by its narrowly or broadly elliptic leaves with more numerous lateral nerves, sub‐orbicular petals and ellipsoidal fruits.     

厚朴一新变种

发表了中国厚朴一新变种,即无毛厚朴(Magnolia officinalis Rehd. &; Wils. var. glabra D. L. Fu, T. B. Zhao et H. T. Dai, var. nov.)。该变种幼枝、托叶、顶叶芽、混合芽、花蕾和花梗均无毛。     

水晶兰属(鹿蹄草科)新变种——霍山水晶兰

描述了在中国安徽发现的水晶兰属一新变种:霍山水晶兰Monotropa uniflora L.var.huoshanensis X.L.Zhao。该变种与原变种水晶兰M.uniflora L.相似,但本变种的花梗有褐色长柔毛,成熟时蒴果果柄弯曲向下而易区别。     

甘肃绿绒蒿属（罂粟科）一新变种—光果红花绿绒蒿

发表了甘肃绿绒蒿属一新变种,即光果红花绿绒蒿(Meconopsis punicea Maxim. var. glabra M .Z. Lu et Y.Sh.Lian)。     

Morphological variability of the diatom Cyclotella atomus Hustedt var. atomus and C. atomus var. gracilis var. nov.

Cyclotella atomus collected from different rivers, reservoirs and lakes shows considerable morphological variability. On the basis of electronmicroscopic (EM) study, we propose Cyclotella atomus var. gracilis Genkal et Kiss as a new variety of this species. Cyclotella atomus var. atomus has short and long radial striae, which are irregularly arranged on the same valve, and the alveolar chambers are not clearly divided from the central, hyaline part of the valve face. In addition to the described basic form, several specimens with other features have also been found and are thought to belong to an undescribed variety. The striae of the new variety are equal in length, and the alveolar chambers are clearly divided from the hyaline central area of the valve face by a curved structure.There are EM micrographs on Cyclotella atomus var. gracilis under different names in different papers. The new variety has several characteristics also found in other species, e.g. Cyclotella caspia Grun., or C. meneghiniana Kütz.     

Hemiboea subcapitata var. pterocaulis (Gesneriaceae), a new variety from Guangxi,China

AbstractHemiboea subcapitata Clarke var. pterocaulis Z. Y. Li, a new variety of the Gesneriaceae from Guangxi, China, is described. The variety is different from the typical one by having winged stem and earlier flowering period.     

广西半蒴苣苔属(苦苣苔科)一新变种——翅茎半蒴苣苔

记载了广西苦苣苔科一新变种——翅茎半蒴苣苔Hemiboea subcapitata Clarke var. pterocaulis Z. Y. Li。该变种与原变种不同在于茎具翅,花期较早。     

Magnolia denudata var. glabrata var. nov. (Magnoliaceae) from Hunan,China

Magnolia denudata var. glabrata Y. L. Wang et S. Z. Zhang var. nov. is described and illustrated from Hunan, China. The variety occurs mainly in semi‐evergreen forest of south Hunan at altitudes between 700 and 1260 m a.s.l. It differs from M. denudata var. denudata by its green and glabrous twigs and leaves which are glabrous above and have some white pubescence underneath. With its white flowers consisting of mostly 9 tepals, it differs from M. sprengeri Pamp. which mainly has 12 tepals in various shades of red/pink to white. The new variety is rare and considered endangered due to habitat destruction.     

香蕉抗(感)病品种根系分泌物对枯萎病菌和枯草芽孢杆菌的生物效应

为明确香蕉根系分泌物对枯萎病菌及其生防枯草芽孢杆菌的生物效应,采用离位溶液培养法收集抗枯萎病香蕉品种(南天黄)和感枯萎病香蕉品种(桂蕉6号)的根系分泌物,研究根系分泌物对土壤微生物种群数量、香蕉枯萎病菌和枯草芽孢杆菌生长的影响。结果表明: 抗病品种根系分泌物能显著减少土壤真菌的数量,抑制枯萎病菌孢子的萌发;而感病品种根系分泌物能显著促进病菌菌丝生长和孢子的萌发,两个品种根系分泌物均能显著促进枯草芽孢杆菌的生长和生物膜形成。经抗(感)病香蕉品种根系分泌物处理,病菌菌丝生长速率分别为11.28和12.28 mm·d^-1,病菌孢子的萌发率分别为34.6%和79.5%;枯草芽孢杆菌培养12 h后菌体生长量的OD₆₀₀分别为1.27和1.14,生物膜形成量在静置培养72 h后OD₅₇₀分别达1.11和1.30,两个品种处理间的差异均达显著水平。枯草芽孢杆菌在香蕉感病品种根际中定殖的菌量显著高于抗病品种。通过对两个品种根系分泌物中可溶性总糖、游离氨基酸和有机酸的含量和组成分析,发现抗病品种根系分泌物中有机酸和游离氨基酸的含量明显高于感病品种,在各组成成分中,以乙酸和脯氨酸在抗(感)病香蕉品种根系分泌物中含量比值较高,分别达3.7和2.4倍。综上所述,抗病品种根系分泌物能抑制病菌生长,感病品种根系分泌物则会显著促进病菌生长,而两个品种根系分泌物均能显著促进枯草芽孢杆菌的生长和生物膜的形成。     

Tremacron aurantiacum var. weiningense (Gesneriaceae) var. nov. from Guizhou,China

Tremacron aurantiacum var. weiningense (Gesneriaceaea), a new variety of Tremacron aurantiacum found in northwest Guizhou, China, is described and illustrated. This new variety differs from T. aurantiacum K. Y. Pan var. aurantiacum in the following respects: it has appressed pubescence and tomentum on the lower surface of its leaves, inflorescence is 4–8‐flowered, 5–10 cymes, peduncles and pedicels are covered with glandular pubescence, the corolla is thin with tube‐like upper lips indistinct and cut‐like, the stigma is 1, capitate.     

缅甸杜茎山属(杜茎山科)一新变种

报道了缅甸克钦邦杜茎山科(Maesaceae)杜茎山属1新变种:光叶杜茎山(Maesa permollis Kurz var.glabrifolia J.Wang&N.H.Xia).     

942. CYMBIDIUM DAYANUM VAR. ANGUSTIFOLIUM

The widespread and variable Cymbidium dayanum Rchb. f. is discussed. A variety from Mount Kinabalu, var. angustifolium is illustrated, and the new combination is made, based on C. angustifolium Ames & C. Schweinf.     

The cell cycle then and now.

In the last few years a general model of cell cycle control has been established for all eukaryotic cells. Experiments from a variety of organisms and from a variety of experimental approaches have identified a protein kinase and its unstable regulatory subunit as the activator of mitosis; related molecules seem to be involved in the activation of chromosome replication. The identification of the biochemical components of these important regulatory pathways is providing several new insights into homeostatic and developmental control mechanisms in higher organisms.     

肯尼亚凤仙花属——新变种

报道了发现于东非肯尼亚塔易塔（Taita）地区亚乐森林（Yale Forest）的凤仙花属（Impatiens L.）一新变种,即：白花拟堇菜凤仙（I.pseudoviola Gilg var.alba G.W.Hu et Q.F.Wang）,该新变种与原变种拟堇菜凤仙（I.pseudoviola Gilg var.pseudoviola）的区别是：花冠纯白色,茎和叶柄均为浅绿色,植株整体缺乏紫色色素;花柄近无毛;低位侧生萼片与高位的侧生萼片近合生。     

On the Taxonomical State of Fritillaria sulcisquamosa and F. puqiensis

F. sulcisquamosa is slightly different from F. unibracteata in pollen morphology and differs external-morphologically from the latter in lacking trellised spots inside tepals. Therefore the former is reduced to a variety of the latter. F. puqiensis is found very similar to F. thunbergii both in pollen morphology and gross morphology. The former is different fromthe latter in geographical distribution and thus reduced to a variety of the latter.