Variation in magnesium and nitrogen content in seeds of antelope bitterbrush (Purshia tridentata, Rosaceae) [0.03%]
抗鹿药实野豌豆种子中镁和氮含量的差异性分析
P Krannitz
P Krannitz
One-hundred and sixty-three seeds from 38 shrubs of antelope bitterbrush (Purshia tridentata) from four different sites were individually analyzed for N and Mg content. Seed nutrient content has previously been shown to affect seedling grow...
Interactions between resources and abiotic conditions control plant performance on subarctic coastal dunes [0.03%]
亚北极海岸沙丘上资源与非生物条件的相互作用控制着植物的生长性能
G Houle
G Houle
Both abiotic conditions and resource levels affect the performance of plants on coastal dune systems. On the foredune, environmental factors are particularly limiting for plant growth and these vary along a short topographical gradient, fro...
Effects of bison and cattle on growth, reproduction, and abundances of five tallgrass prairie forbs [0.03%]
美洲野牛和家牛对高草草原5种阔叶植物的生长、繁殖及密度的影响
S Damhoureyeh,D Hartnett
S Damhoureyeh
Forb populations were sampled on Kansas tallgrass prairie to examine the effects of native (bison) and domestic (cattle) ungulates on plant growth, reproduction, and species abundances. Five locally and regionally abundant native tallgrass ...
Why do early-emerging tree seedlings have survival advantages?: a test using Acer rubrum (Aceraceae) [0.03%]
为什么早期萌发的树苗具有生存优势？——以 Acer rubrum（ Aceraceae）为例的一项测试
R Jones,B Allen,R Sharitz
R Jones
In forest understories, tree seedlings that germinate and emerge early in the growing season have significant survival advantages. We hypothesized that (a) early emergence is related to seed size and half-sib family, and (b) increased survi...
Carbon isotopic composition of legumes with photosynthetic stems from mediterranean and desert habitats [0.03%]
地中海和沙漠生境中具有光合茎的豆科植物的碳同位素组成
E Nilsen,M Sharifi
E Nilsen
The carbon isotopic compositions of leaves and stems of woody legumes growing in coastal mediterranean and inland desert sites in California were compared. The overall goal was to determine what factors were most associated with the carbon ...
Analysis of amino acids in nectar from pitchers of Sarracenia purpurea (Sarraceniaceae) [0.03%]
瓶子草纳克中的氨基酸分析
W Dress,S Newell,A Nastase et al.
W Dress et al.
Sarracenia purpurea L. (northern pitcher plant) is an insectivorous plant with extrafloral nectar that attracts insects to a water-filled pitfall trap. We identified and quantified the amino acids in extrafloral nectar produced by pitchers ...
Changes in the delta13C values of trees during a tropical rainy season: some effects in addition to diffusion and carboxylation by Rubisco? [0.03%]
热带雨季期间树木δ13C值的变化：除了扩散和RuBisCO羧化之外的影响？
V Terwilliger
V Terwilliger
The d13C values of deciduous and evergreen tree leaves were compared in open and closed- canopy environments throughout a rainy season in Panamá. Newly emerging leaves had higher d13C values than older leaves of all seedlings and tre...
Mating structure and inbreeding and outbreeding depression in the rare plant Gentianella germanica (Gentianaceae) [0.03%]
牻牛儿苗属植物德国玄参的交配制度及近亲繁殖与杂交衰退研究
M Fischer,D Matthies
M Fischer
Isolation and small size of populations as a result of habitat destruction and fragmentation may negatively affect plant fitness through pollinator limitation and increased levels of inbreeding. To increase genetic variation in small popula...
The spatial genetic structure of cytoplasmic (cpDNA) and nuclear (allozyme) markers within and among populations of the gynodioecious Thymus vulgaris (Labiatae) in southern France [0.03%]
法国南部香薄荷(THEMEDICINALTHYME)的叶绿体DNA和细胞核酶型遗传结构分析
M Tarayre,P Saumitou-Laprade,J Cuguen et al.
M Tarayre et al.
Recent advances in molecular biology have allowed the development of techniques to contrast spatial differentiation in nuclear and cytoplasmic genes and thus provide important data on relative levels of gene flow by pollen and seed in highe...
Genetic diversity and breeding system in a group of neotropical epiphytic ferns (Pleopeltis; Polypodiaceae) [0.03%]
热带附生拟鳞木蕨类植物(Pleopeltis; Polypodiaceae)的基因多样性和繁殖系统研究
E Hooper,C Haufler
E Hooper
Epiphytes are ecologically important components of tropical forests worldwide and yet they have been underrepresented in studies of reproductive biology. Given the presumed ephemeral nature of their substrates, and the importance of dispers...