Lots of seeds lack endosperm, though. Generally, those are seeds that canīt be stored for much long, because without endosperm, they would need to germinate quickly to get its own food through photosynthesis.
Definition as written by Margiempv: ...
Endosperm- A nutritive tissue in seed plants formed within the embryo sac.
Endotrophic mycorrhiza (endomycorrhiza)-A mycorrhiza penetrating into the associated root and ramifying between the cells; generally formed by phycomycete fungi.
endosperm. The tissue containing stored food in a seed that surrounds the embryo and is eventually digested by the embryo as it grows.
endosperm The nutritive tissue within the seed of a flowering plant. Surrounds and is absorbed by the embryo.
enzyme A biological catalyst that aids in a specific biochemical process, such as converting food from one form to another.
Endosperm The food storage tissue within a seed Epiphyte A plant which grows above ground, attaching itself to a tree or rock. Evergreen Retaining leaves for most or all of an annual cycle.
Seeds contain an embryo that will develop into the plant and an endosperm or food source for the embryo. The size of seed varies. Generally, the larger the seed the more endosperm it contains and the longer it can survive without food from the soil.
Because orchid seeds are so small, however, they contain virtually no endosperm, the food reserve on which young plantlets typically depend prior to the development of roots and leaves.
Starchy and other nutritive material in a seed, stored as endosperm inside the embryo sac, or as perisperm in the surrounding nucellar cells; any deposit of nutritive material accompanying the embryo.
GardenWeb Glossary of Botanical Terms ...
You'll know that you're through when you see the white endosperm," says James F. Harbage, research division leader at Longwood Gardens, in Kennett Square, Pennsylvania.
The second sperm cell fuses with the two haploid polar nuclei of the central cell to form a triploid cell that grows by mitosis and develops into endosperm, a nutrient tissue that nourishes the embryo.
vessel; sperma, seed) a major division of the plant kingdom, commonly called flowering plants as their reproductive organs are in flowers, having seeds which develop in a closed ovary made of carpels, a very reduced gametophyte, and endosperm develop ...
a root, the hypocotyl or beginning of a shoot, either one or two seed leaves or cotyledons (the seed's food supply), and the epicotyl, which will become the first true leaves. The seeds of some plants have a second food supply, called the endosperm.
 See also: Plant, Water, Embryo, Seed, Growing
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