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5 Pack Turtle Grass Sprouted Seedlings Marine Plant Macro Saltwater Aquatic Seed

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5 Sprouted Seeds

Thalassia testudinum, commonly known as turtlegrass,[3] is a species of marine seagrass. It forms meadows in shallow sandy or muddy locations in the Caribbean Sea and the Gulf of Mexico.[4] Turtle grass and other seagrasses form meadows which are important habitats and feeding grounds. The grass is eaten by turtles and herbivorous fish, supports many epiphytes, and provides habitat for juvenile fish and many invertebrate taxa.
Turtle grass can reproduce both through vegetative and sexual reproduction. The main propagation method is by extension of the underground rhizome, or stem. This increase in rhizome length results in asexual ramets, or clonal colonies which are genetic replicates of the parent plant. Although asexual propagation results in an increase in the size of the turtle grass bed, extensive asexual reproduction limits genetic diversity and can put the meadow at severe risk if there is a disease outbreak.[6] It has been found that where plants have been damaged mechanically, such as by the propellers of boats, the cut ends of rhizomes are unable to grow and holes may develop in the turtle grass meadow.[5]

Turtle grass can also sexually reproduce through the production of underwater flowers and hydrophily. Turtle grass is dioecious, which means that there are separate male and female plants, each which produce an imperfect flower containing only one sex. Sexual reproduction takes place from April to July depending on location, though flowering has been observed during warm winters in Tampa Bay, Florida.[9][10][11] The small flowers are each borne by a peduncle. Female plants typically grow one green flower, while males often produce three to five pink or white flowers.[12][13][14] At night when male flowers are fully mature, they release mucilaginous pollen into the water column.[15][16][17] The following morning, female flowers open.

There are two methods of pollination: hydrophily and biotic pollination. In hydrophilic pollination, the pollen grains are carried through the water column by tides or currents and deposited upon an open pistillate flower. Underwater video cameras have more recently revealed crustaceans, polychaetes, and amphipods swimming towards open male flowers.[17][15][16][18] These creatures were attracted to the seagrass’s nutritious mucilage—a carbohydrate-rich substance that houses pollen. As the invertebrates feed on the mucilage, excess pollen grains stick to their bodies. They move from flower to flower, feeding and spreading the pollen from male to female.

Seeds begin to develop in about 2–4 weeks if fertilization occurred.[6] Female turtle grass fruits develop into green capsule about 20–25 mm in diameter and can include 1-6 small seeds.[16][12] After about 8 weeks of growth, the fruit undergoes dehiscence (botany), which releases neutrally buoyant seeds into the water column.[14][12][10][6] If an event occurs producing significant water turbulence, an immature fruit may break off from the peduncle. This buoyant fruit acts as a transportation vessel as it continues to develop. The fruit will moved around by wind, currents, and tides until it eventually splits open to release the negatively buoyant seedlings into a new area. If the new location has favorable environmental conditions, the seedling will begin to grow. This is one way viviparous seedlings can start new patches of seagrass.[1]

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