Interspecific relationships in Fagopyrum (Polygonaceae) revealed by the nucleotide sequences of the rbcL and accD genes and their intergenic region [0.03%]
根据rbcL和accD基因及其内含子序列分析荞麦属（蓼族）的科间关系
Y Yasui,O Ohnishi
Y Yasui
DNA sequences of the rbcL and accD 5' coding regions and their intergenic region (IGR) were determined in 20 taxa of 12 species of Fagopyrum. By comparing the sequence data and constructing phylogenetic trees, phylogenetic relationships amo...
Fossil Clusiaceae from the late Cretaceous (Turonian) of New Jersey and implications regarding the history of bee pollination [0.03%]
新泽西晚白垩世（土仑阶）壳斗目化石及其对传蜂pollination的启示
W Crepet,K Nixon
W Crepet
The Turonian flora from Sayreville New Jersey includes one of the world's most diverse assemblages of Cretaceous angiosperm flowers. This flora is made even more interesting by its association with a large insect fauna that is preserved by ...
Latitudinal population differentiation in two species of Solidago (Asteraceae) introduced into Europe [0.03%]
两种引入欧洲的Solidago物种的纬度人口分化
E Weber,B Schmid
E Weber
Solidago altissima and S. gigantea were introduced from North America to Europe ~250 yr ago and are now considered aggressive weeds in abandoned fields and conservation areas. We studied patterns of genetic differentiation in these two spec...
Do surface plant and soil seed bank populations differ genetically? A multipopulation study of the desert mustard Lesquerella fendleri (Brassicaceae) [0.03%]
地表植物和土壤种子库群体的遗传差异大吗？沙漠芥属芸苔科植物Lesquerella fendleri多群体研究
R Cabin,R Mitchell,D Marshall
R Cabin
Seed banks are an important component of many plant populations, but few empirical studies have investigated the genetic relationship between soil seeds and surface plants. We compared the genetic structure of soil seeds and surface plants ...
Postglacial migration and the loss of allozyme variation in northern populations of Asclepias exaltata (Asclepiadaceae) [0.03%]
第四纪冰期以来的迁移及其导致的北美植物阿氏白首乌居群遗传多样性丢失
S Broyles
S Broyles
The recent Wisconsin glaciation has provided opportunities for examining the effects of postglacial recolonization on the population genetics of plant and animal communities. In this study allozyme Variation was examined in 19 populations o...
F Molina-Freaner,C Tinoco-Ojanguren,K Niklas
F Molina-Freaner
The allometric relationship of stem length L with respect to mean stem diameter D was determined for 80 shoots of each of three columnar cactus species (Stenocereus thurberi, Lophocereus schottii, and S. gummosus) to determine whether this ...
Preferential states of longitudinal tension in the outer tissues of Taraxcum officinale (Asteraceae) peduncles [0.03%]
牻牛儿苗属（菊科）茎秆外周组织纵向拉伸的优先状态
K Niklas,D Paolillo Jr
K Niklas
We tested Wilhelm Hofmeister's hypothesis that the outer layers of herbaceous stem tissues are held in a preferential state of longitudinal tension by more internal stem tissues that are held in a reciprocal state of compression. We measure...
L Hufford
L Hufford
Polystemonous androecia are diverse in both number and position of stamens. This investigation of polystemonous Hydrangeaceae uses developmental data to characterize (1) the range of developmental variations that account for the diverse and...
Evolution of novel morphological and reproductive traits in a clade containing Antirrhinum majus (Scrophulariaceae) [0.03%]
紫苑属洋鼠尾草族分支中新形态及生殖性状的演化研究含龙胆紫（紫苑）
P Reeves,R Olmstead
P Reeves
Phylogenetic analysis of DNA sequences of the chloroplast genes rcbL and ndhf revealed a highly supported clade composed of the families Plantaginaceae, Callitrichaceae, and Hippuridaceae in close association with the model organism Antirrh...
Patterns of genetic variation detected by RAPDs suggest a single origin with subsequent mutations and long-distance dispersal in the apomictic fern Dryopteris remota (Dryopteridaceae) [0.03%]
基于RAPD的遗传变异模式表明在无性繁殖蕨类植物瘤鳞毛蕨（鳞毛蕨科）中存在单一起源和随后突变以及长距离传播的现象
J Schneller,R Holderegger,F Gugerli et al.
J Schneller et al.
Debates on speciation processes in pteridophytes have revived. In order to study the evolutionary origin of an apomictic fern species, we investigated the genetic variation in the strictly agamosporous Dryopteris remota. We determined the g...