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The following types of seed dormancy do not involve seed dormancy, strictly speaking, as lack of germination is prevented by the environment, not by characteristics of the seed itself (see Germination): Photodormancy or light sensitivity affects germination of some seeds. These photoblastic seeds need a period of darkness or light to germinate.
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. It is a category of embryophyte (i.e. land plant) that includes most of the familiar ...
Mustard seeds are the small round seeds of various mustard plants. The seeds are usually about 1 to 2 millimetres (⁄32 to ⁄32 in) in diameter and may be colored from yellowish white to black. They are an important spice in many regional foods and may come from one of three different plants: black mustard (Brassica nigra), brown mustard (B ...
Dicotyledon. Magnoliatae Takht. [1] The dicotyledons, also known as dicots (or, more rarely, dicotyls), [2] are one of the two groups into which all the flowering plants (angiosperms) were formerly divided. The name refers to one of the typical characteristics of the group: namely, that the seed has two embryonic leaves or cotyledons.
The seed also contains the integument cells surrounding the embryo. This is an evolutionary characteristic of the Spermatophyta. Mature seed drops out of cone onto the ground. Seed germinates and seedling grows into a mature plant. When the plant is mature, it produces cones and the cycle continues.
The gymnosperms (/ ˈdʒɪmnəˌspɜːrmz, - noʊ -/ ⓘ JIM-nə-spurmz, -noh-; lit. 'revealed seeds') are a group of seed-producing plants that include conifers, cycads, Ginkgo, and gnetophytes, forming the clade Gymnospermae. The term gymnosperm comes from the composite word in Greek: γυμνόσπερμος (γυμνός, gymnos, 'naked ...
The mustard plant is any one of several plant species in the genera Brassica, Rhamphospermum and Sinapis in the family Brassicaceae (the mustard family). Mustard seed is used as a spice. Grinding and mixing the seeds with water, vinegar, or other liquids creates the yellow condiment known as prepared mustard.
The onion plant (Allium cepa), also known as the bulb onion [6] or common onion, [3]: 9–10 is the most widely cultivated species of the genus Allium.[7][8] It was first officially described by Carl Linnaeus in his 1753 work Species Plantarum. [9] A number of synonyms have appeared in its taxonomic history: