1. The cyathium of both species studied begins as a papilla which arises between two bracts. The order of appearance of the parts of the cyathium is as follows: staminate flowers, involucre, ovules, ...

American Journal of Botany, Vol. 35, No. 6 (Jun., 1948), pp. 343-349 (7 pages) The female gametophytes of Hesperocallis undulata Gray and Leucocrinum montanum Nutt. follow the normal type of ...

SEVEN ‘Golden Delicious’ apple clones propagated from buds irradiated at 5,000 r. in a cobalt-60 source were selected for high, intermediate, and low pollen abortion. Pollen abortion was 4.9 per cent ...

To add to the 70 th anniversary celebrations of the British Developmental Biology Society, Nature Communications would like to highlight some of our developmental biology papers published in the ...

Microscopy image of a PGA at day 8 showing the early tissues supporting the embryo, including the amniotic sac and the yolk sac-like structures, surrounded by (extra-embryonic) mesoderm tissue.

A new study using stem cell-based models has shed new light on how the human embryo begins to develop, which could one day benefit the development of fertility treatment. The study led by at the ...

University of Cambridge scientists have used human stem cells to create three-dimensional embryo-like structures that replicate certain aspects of very early human development—including the production ...

Mouse embryonic stem cells (ESCs) and extraembryonic trophoblast stem cells (TSCs) have been combined in a 3D scaffold to generate structures whose morphogenesis is remarkably like that of natural ...