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In botany, a seed is a plant embryo and nutrient reserve enclosed in a seed coat, a protective outer covering called a testa. More generally, the term "seed" means anything that can be sown, which may include seed and husk or tuber. Seeds are the product of the ripened ovule, after the embryo sac is fertilized by sperm from pollen, forming a ...
The angiosperms ("vessel seeds") are the only group to fully enclose the seed, in a carpel. [citation needed] Fully enclosed seeds opened up a new pathway for plants to follow: that of seed dormancy. The embryo, completely isolated from the external atmosphere and hence protected from desiccation, could survive some years of drought before ...
Small seeds are seen to be predominant in arid, desert environments. [16] In some desert systems the vast majority of annual seeds weigh between zero and two milligrams. [17] small seed size may be a favorable adaptation in desert plants for a couple reasons. Small seeds have been found to have the ability to store in dry environments for ...
The seed of a vascular plant is a small package produced in a fruit or cone after the union of male and female reproductive cells. All fully developed seeds contain an embryo and, in most plant species some store of food reserves, wrapped in a seed coat. Dormant seeds are viable seeds that do not germinate because they require specific internal ...
Seed and fruit crop 228.8 Mbp 27,998 20 National Autonomous University of Mexico: 2019, [83] updated in 2021 contig N50 447 kbp scaffold N50 11.6 Mbp total coverage: 120x Illumina (HiSeq2000 and MiSeq) + 31x PacBio RSII Cucurbita argyrosperma subsp. sororia (wild gourd) Cucurbitaceae: Wild relative of the silver-seed gourd 255.2 Mbp 30,592 20
Plant embryonic development, also plant embryogenesis, is a process that occurs after the fertilization of an ovule to produce a fully developed plant embryo. This is a pertinent stage in the plant life cycle that is followed by dormancy and germination . [ 1 ]
The seed cones of species in the families Podocarpaceae and Taxaceae have a bright colour when fully developed, increasing the resemblance to true berries. The "berries" of yews ( Taxus species) consist of a female seed cone with which develops a fleshy red aril partially enclosing the poisonous seed.
A seed plant or spermatophyte (lit. ' seed plant '; from Ancient Greek σπέρματος (spérmatos) 'seed' and φυτόν (phytón) 'plant'), also known as a phanerogam (taxon Phanerogamae) or a phaenogam (taxon Phaenogamae), is any plant that produces seeds.