A gradient (red) in the concentration of auxin, a plant hormone, determines that only one of the eight undifferentiated nuclei in a plant's embryo sac will become an egg. (In this image, a large ...

A gradient (red) in the concentration of the plant hormone auxin determines that only one of the eight nuclei in a plant's embryo sac will become an egg. (The blue island in the image is a cell ...

Gymnosperms, of which there are around 1,026 species 3, are vascular plants, meaning that they contain a tubular tissue network that transports water and nutrients, and provides mechanical support.

This is a preview. Log in through your library . Abstract Seed size is a key determinant of evolutionary fitness, and is also one of the most important components of seed yield. In angiosperms, seed ...

A long-standing mystery surrounding a fundamental process in plant biology has been solved by a team of scientists at the University of California, Davis. The group's ground-breaking discovery that a ...