1998 Vol. 16 No. 4
1998, 16(4): 289-293.
Abstract:
The main processes of life cycle of the genus Thladiantha were first investigated.Several important characters of embryology were observed and described as follows: secretory tapetum, simultaneous cytokinesis, microspore tetras, tetrahedral and isobilateral, two-celledpollen grains, bitegminous,crassinucellate, polygonad type embryo sac, micropylar fertilization,embryogenesis onagrad type.
The main processes of life cycle of the genus Thladiantha were first investigated.Several important characters of embryology were observed and described as follows: secretory tapetum, simultaneous cytokinesis, microspore tetras, tetrahedral and isobilateral, two-celledpollen grains, bitegminous,crassinucellate, polygonad type embryo sac, micropylar fertilization,embryogenesis onagrad type.
1998, 16(4): 294-298.
Abstract:
The leaves of Perilla frutescens (L.) Britton beared two types of glandularhairs,peltate and capitate, which comprised one hasal cell,one stalk cell and one head.The head of peltate glandular hairs consisted of one,two, four or eight secretory cellsand was peltate--shaped while that of capitate glandular hairs was composed of one,two,or four secretory cells and was globose-shaped.The initial cells of both types of glandular hairs originated from the protodermal cells and created a hasal cell,a stalk cell and anapical cell through two successive periclinal divisions.During the late stage of the morphogenesis of glandular hairs,the type of glandular hairs was affected by the differentiation degree of the stalk cell.The apical cell would develop into the head cells of peltateglandular hairs if the stalk cell kept meristematic and flat-shaped.The apical cell woulddevelop into the head cells of capitate glandular hairs if the stalk cell rapidly enlargedlongitudinally and was of vacuolization.
The leaves of Perilla frutescens (L.) Britton beared two types of glandularhairs,peltate and capitate, which comprised one hasal cell,one stalk cell and one head.The head of peltate glandular hairs consisted of one,two, four or eight secretory cellsand was peltate--shaped while that of capitate glandular hairs was composed of one,two,or four secretory cells and was globose-shaped.The initial cells of both types of glandular hairs originated from the protodermal cells and created a hasal cell,a stalk cell and anapical cell through two successive periclinal divisions.During the late stage of the morphogenesis of glandular hairs,the type of glandular hairs was affected by the differentiation degree of the stalk cell.The apical cell would develop into the head cells of peltateglandular hairs if the stalk cell kept meristematic and flat-shaped.The apical cell woulddevelop into the head cells of capitate glandular hairs if the stalk cell rapidly enlargedlongitudinally and was of vacuolization.
1998, 16(4): 299-301.
Abstract:
It is reported in this paper the chromosome number of 6 species and 1 variety in Actinidia Lindl, showing that A.hubeiensis, A.zhejiangensis and A.fulvicoma are diploid, 2n=2x=58; A.grandiflora is a tetraploid, 2n=4x=116; A.deliciosa var.chlorocarpa is a tetraploid, 2n=4x=116.The above results are all reported for the first time,which has verified again that x=29 should be the basic number of chromosomes in this genus,and the diploid type of A.latifolia and A.kolomikta is 2n=2x=58.
It is reported in this paper the chromosome number of 6 species and 1 variety in Actinidia Lindl, showing that A.hubeiensis, A.zhejiangensis and A.fulvicoma are diploid, 2n=2x=58; A.grandiflora is a tetraploid, 2n=4x=116; A.deliciosa var.chlorocarpa is a tetraploid, 2n=4x=116.The above results are all reported for the first time,which has verified again that x=29 should be the basic number of chromosomes in this genus,and the diploid type of A.latifolia and A.kolomikta is 2n=2x=58.
1998, 16(4): 302-304.
Abstract:
Ten large fruit strains of Actinidia chinensis var.chinensis were found to be tetraploid.Mean fruit weights are from 71 g to 100 g.Fruit shapes are spheroidal .ovoid, ellipsoid,or turbinate.Habitat altitutes are from 560 m to 1035 m.The relationship between fruit size and polyploidy as well as the genetic breeding value of the tetraploidstrains were discussed.
Ten large fruit strains of Actinidia chinensis var.chinensis were found to be tetraploid.Mean fruit weights are from 71 g to 100 g.Fruit shapes are spheroidal .ovoid, ellipsoid,or turbinate.Habitat altitutes are from 560 m to 1035 m.The relationship between fruit size and polyploidy as well as the genetic breeding value of the tetraploidstrains were discussed.
1998, 16(4): 305-309.
Abstract:
Asuperoxide dismutase from leek mitochondria has been purified to homogeneith by ammonium sulfate fraction, DEAE-Sephacel chromotography and Sephadex G-200 gel filtration.2.5 mg purified enzyme was obtained from 6000 g leaves.The specific activity of the purified enzyme is 1200 U/mg protein.The enzyme is not sensitive to inhibitors:KCN nad H2O2.It has good heat .stability.The largest amount of ultraviolet absorption is at 280 urn.The molecular weight of the enzyme is about 82000 Das assayed by Sephadex G-200 gel filtration,that of the enzyme subunit is about 22000 Das tested by SDS-polyacrylamide gel electrophoresis.The N-terminal amine acid of the enzyme is valine as tested by DNS-CI.These results show the enzyme is a manganese superoxide.
Asuperoxide dismutase from leek mitochondria has been purified to homogeneith by ammonium sulfate fraction, DEAE-Sephacel chromotography and Sephadex G-200 gel filtration.2.5 mg purified enzyme was obtained from 6000 g leaves.The specific activity of the purified enzyme is 1200 U/mg protein.The enzyme is not sensitive to inhibitors:KCN nad H2O2.It has good heat .stability.The largest amount of ultraviolet absorption is at 280 urn.The molecular weight of the enzyme is about 82000 Das assayed by Sephadex G-200 gel filtration,that of the enzyme subunit is about 22000 Das tested by SDS-polyacrylamide gel electrophoresis.The N-terminal amine acid of the enzyme is valine as tested by DNS-CI.These results show the enzyme is a manganese superoxide.
1998, 16(4): 310-314.
Abstract:
Ataxonomic study on 8 species of harmful red tide causative algae was undertaken.Samples were collected from Guangdong coast of South China Sea between October 1997 and April 1998 When red tides occurred in those areas.One spedes of Prymnesiophytes (Phaeocystis of.globosa),which was reported to cause red tide in China for the first time.The others were all dinoflagellates,three of which were toxic.They were 3 species of Gymnodiniales: Gymnodinium mikimotio, Gyrodinium instriatum and Phaepolykrikos hartmanii; 1 species of Dinophysiales: Dinophysis caudata; 2 species of Prorocentrales: Prorocentrum micans and Prorocentrum lima; 1 species of Peridiniales:Alexandrum catenella.
Ataxonomic study on 8 species of harmful red tide causative algae was undertaken.Samples were collected from Guangdong coast of South China Sea between October 1997 and April 1998 When red tides occurred in those areas.One spedes of Prymnesiophytes (Phaeocystis of.globosa),which was reported to cause red tide in China for the first time.The others were all dinoflagellates,three of which were toxic.They were 3 species of Gymnodiniales: Gymnodinium mikimotio, Gyrodinium instriatum and Phaepolykrikos hartmanii; 1 species of Dinophysiales: Dinophysis caudata; 2 species of Prorocentrales: Prorocentrum micans and Prorocentrum lima; 1 species of Peridiniales:Alexandrum catenella.
1998, 16(4): 315-316.
Abstract:
Chinese records of Corylus wangii Hu (Betulaceae) have only been reported fornorthwestern Yunnan Province.Specimens collected from eastern Sichuan and deposited inPEwere recently identified as C.wangii, This represents a new distribution for the species.Although C.wangii is sometimes synonymized under Corylus jacquemontii,we found it to bemorphologically and molecularly distinct.
Chinese records of Corylus wangii Hu (Betulaceae) have only been reported fornorthwestern Yunnan Province.Specimens collected from eastern Sichuan and deposited inPEwere recently identified as C.wangii, This represents a new distribution for the species.Although C.wangii is sometimes synonymized under Corylus jacquemontii,we found it to bemorphologically and molecularly distinct.
1998, 16(4): 317-324.
Abstract:
The community characteristics and quality of Castanopsis eyeri distributed at the Tiantai Mountain of Zhejiang Province are analysed.The Castanopsis eyeri has a striking dominant which shows the monodominant community in the Castanopsis eyeri community.There is complicated vertical structure which can be divided into tree stratum,shrub stratum and herb layer as well as a definite number of interstratum plants.The species diversity index of the tree stratum is a bit low,which has something to do with the monodominant community formed under particular living conditions.There is the very striking similarity of plant species among different plots,and there is a relatively uniform composition of species in the community.The age structures of the dominantpopulation-Castanopsis eyeri and Schima superba belong to stable or increasing type.And the distribution patterns among 10 plots are of clump distribution.
The community characteristics and quality of Castanopsis eyeri distributed at the Tiantai Mountain of Zhejiang Province are analysed.The Castanopsis eyeri has a striking dominant which shows the monodominant community in the Castanopsis eyeri community.There is complicated vertical structure which can be divided into tree stratum,shrub stratum and herb layer as well as a definite number of interstratum plants.The species diversity index of the tree stratum is a bit low,which has something to do with the monodominant community formed under particular living conditions.There is the very striking similarity of plant species among different plots,and there is a relatively uniform composition of species in the community.The age structures of the dominantpopulation-Castanopsis eyeri and Schima superba belong to stable or increasing type.And the distribution patterns among 10 plots are of clump distribution.
1998, 16(4): 325-334.
Abstract:
South Birch forest and West Birch forest are a seral stage of evergreen broadleaf forest sere,mainly occuring in red and yellow soil mountain of subtropics in Guangxi.Three plant associations are described as follows: Betula austro-sinensis Rhododendron cavaleriei-Indocalamus barbatus Phyllagathis microplectra Association; Betula alnoides-Myrica esculenta-Glochidion eriocarpum-Dicranopteris dichotoma Association; Betula alnoides-Ardisia quinqueqona-Indosasa hispida-Osmunda vachellii Association.Their successional trend of recovering evergreen broadleaf forest can be fully proved through information analysis of species compositions change of community.
South Birch forest and West Birch forest are a seral stage of evergreen broadleaf forest sere,mainly occuring in red and yellow soil mountain of subtropics in Guangxi.Three plant associations are described as follows: Betula austro-sinensis Rhododendron cavaleriei-Indocalamus barbatus Phyllagathis microplectra Association; Betula alnoides-Myrica esculenta-Glochidion eriocarpum-Dicranopteris dichotoma Association; Betula alnoides-Ardisia quinqueqona-Indosasa hispida-Osmunda vachellii Association.Their successional trend of recovering evergreen broadleaf forest can be fully proved through information analysis of species compositions change of community.
1998, 16(4): 335-342.
Abstract:
Banqiao Mountainous Region (BMR) belongs to the extention of Mountain Huangshan.In BMR there are 1056 species of vascular plants, belonging to 556 genera and 154 families.Seventeen of these plants are the rare and endangered plants protected by law in China.The density of family, genera and species in BMR are respectively 2.3/km2, 8.3/km2, 15.7/km2, which are very similar to Mt.Huangshan and Mt.Jlulongshan.The flora of BMR shows complex, transitional and ancient characteristics.According to the analysis of chinese endemic genera in BMR, the origin of them is mainly historical reason rather than ecologial reason.Based on tile spedes diversity and other reasons, the author thinks it necessary an(l urgent to establish Banqiao Nature Preserve.
Banqiao Mountainous Region (BMR) belongs to the extention of Mountain Huangshan.In BMR there are 1056 species of vascular plants, belonging to 556 genera and 154 families.Seventeen of these plants are the rare and endangered plants protected by law in China.The density of family, genera and species in BMR are respectively 2.3/km2, 8.3/km2, 15.7/km2, which are very similar to Mt.Huangshan and Mt.Jlulongshan.The flora of BMR shows complex, transitional and ancient characteristics.According to the analysis of chinese endemic genera in BMR, the origin of them is mainly historical reason rather than ecologial reason.Based on tile spedes diversity and other reasons, the author thinks it necessary an(l urgent to establish Banqiao Nature Preserve.
1998, 16(4): 343-345.
Abstract:
An aromatic ornamental plant, Dendranthema indicum (L.) Des Moul cv.‘Aromatlcums' is a new cultivated variety of Compositae.26 known compounds as 92.4% of essential oil from its flowers were identified by means of GC/MS/DS.Its main aromatic component was identified as chrysanthanol by means of IR, 1HMNR and MS.
An aromatic ornamental plant, Dendranthema indicum (L.) Des Moul cv.‘Aromatlcums' is a new cultivated variety of Compositae.26 known compounds as 92.4% of essential oil from its flowers were identified by means of GC/MS/DS.Its main aromatic component was identified as chrysanthanol by means of IR, 1HMNR and MS.
1998, 16(4): 346-358.
1998, 16(4): 359-365.
1998, 16(4): 366-372.
1998, 16(4): 373-375.
1998, 16(4): 376-378.
1998, 16(4): 379-382.
1998, 16(4): 383-384.