A Kuang,A Popova,Y Xiao et al.
A Kuang et al.
Plant reproduction under spaceflight conditions has been problematic in the past. In order to determine what aspect of reproductive development is affected by microgravity, we studied pollination and embryo development in Brassica rapa L. d...
Is The Barley Endosperm a Water Reservoir for the Embryo When Germinating Seeds Are Dried? [0.03%]
干燥种子发芽时，麦粒胚乳是否是胚胎的含水层？
PS Allen,ET Thorne,JS Gardner et al.
PS Allen et al.
The water content of germinating seeds fluctuates in response to water potential changes in the surrounding environment. We tested the hypothesis that the endosperm functions as a water reservoir when imbibed seeds experience drying, and we...
Revision of Lyonothamnus A. Gray (Rosaceae) from the Neogene of Western North America [0.03%]
北美洲西部新近纪梁ノ华属(A.Gray)修订
DM Erwin,HE Schorn
DM Erwin
Lyonothamnus Gray is a monotypic genus of evergreen trees endemic to California's Channel Islands. There is one species, L. floribundus, with two subspecies, ssp. floribundus and ssp. asplenifolius. Subspecies floribundus has simple and ent...
Chaneya, a New Genus of Winged Fruit from the Tertiary of North America and Eastern Asia [0.03%]
产于北美和东亚的第三纪具有翅膀果实的新属 Chaneya 的研究
Y Wang,SR Manchester
Y Wang
A new genus is recognized on the basis of wind-dispersed fruits from the Eocene of western North America and Miocene of eastern Asia. The fruits consist of an accrescent hypogynous calyx of five obovate sepals and one or more globose fruit ...
A New Species of Millerocaulis (Osmundaceae) from the Lower Cretaceous of California [0.03%]
加州下白垩纪发现一种新的轮叶蕨属(Osmundaceae)物种
RA Stockey,SY Smith
RA Stockey
A small permineralized osmundaceous stem has been collected from marine sediments of the Early Cretaceous (Aptian), Upper Chickabally Member of the Budden Canyon Formation near Ono, California. The specimen, 8.5 cm long and 5.4 cm wide, rep...
The Stomatal Ontogeny and Structure of the Liassic Pteridosperm Sagenopteris (Caytoniales) from Hungary [0.03%]
匈牙利海州esiaceae Caytoniales Sagenopteris的叶发育及气孔结构
M Barbacka,K Bóka
M Barbacka
Stomatal ontogeny is often inferred but rarely documented for extinct fossil plants because it requires observations from young leaves that are rarely preserved as fossils. The discovery of several very young leaves of the Jurassic plant Sa...
Direct Access to Plant Epicuticular Wax Crystals by a New Mechanical Isolation Method [0.03%]
一种新型机械分离法直接获取植物表皮蜡晶体
HJ Ensikat,C Neinhuis,W Barthlott
HJ Ensikat
A new method for the isolation of wax crystals from plant surfaces is presented. The wax-covered plant surface, e.g., a piece of a leaf or fruit, is brought into contact with a preparation liquid, e.g., glycerol or triethylene glycol, and c...
Twinned Raphides of Calcium Oxalate in Grape (Vitis): Implications for Crystal Stability and Function [0.03%]
葡萄中草酸钙孪晶针晶的研究：对晶体稳定性和功能的意义
HJ Arnott,MA Webb
HJ Arnott
Among the higher plants that accumulate crystalline calcium oxalate, many taxa characteristically produce raphides, or needle-shaped crystals. Substantial evidence has accumulated indicating that raphides function in plant defenses against ...
Morphology and Stomatal Function of Douglas Fir Needles Exposed to Climate Change: Elevated CO2 and Temperature [0.03%]
气候变暖和二氧化碳浓度升高对 Douglas 松针气孔功能及解剖结构的影响
ME Apple,DM Olszyk,DP Ormrod et al.
ME Apple et al.
Climate change may have an impact on the productivity of conifer trees by influencing the morphology (size and surface characteristics) and function (capacity for gas exchange) of conifer needles. In order to test the responses of needles t...
Effects of Resource Availability on Carbon Allocation and Developmental Instability in Cloned Birch Seedlings [0.03%]
资源可得性对克隆桦树种子幼苗碳分配和发育不稳定性的效应
JH Lappalainen,J Martel,K Lempa et al.
JH Lappalainen et al.
Abundant nitrogen improves seedling growth and establishment. Vigorous growth brings about changes in rates and patterns of plant development and changes in the relationship between primary and secondary metabolism, which may make seedlings...