Monocot (left) and dicot (right) seedlingsDevelopment of an angiosperm (maple) seedlingDevelopment of a gymnosperm (Douglas fir) seedling
Discover great deals on the many hard to find and one of a kind items available only on eBay!

This site contains sponsored affiliate links.

Seedlings

A seedling is a young plant sporophyte developing out of a plant embryo from a seed. Seedling development starts with germination of the seed. more...

HomeHome
Bird & Wildlife AccessoriesBird & Wildlife Accessories
Garden DécorGarden Décor
Garden Structures & FencingGarden Structures & Fencing
Gardening & PlantsGardening & Plants
Children's Gardening ItemsChildren's Gardening Items
Fertilizer & Soil AmendmentsFertilizer & Soil Amendments
Garden Tools & EquipmentGarden Tools & Equipment
Hydroponics & Seed StartingHydroponics & Seed Starting
OtherOther
Pest & Weed ControlPest & Weed Control
Planters, Pots & Window...Planters, Pots & Window...
Plants, Seeds & BulbsPlants, Seeds & Bulbs
Aquatic PlantsAquatic Plants
PlantsPlants
Pond PlantPond Plant
SeedlingsSeedlings
SeedsSeeds
Water LilyWater Lily
BonsaiBonsai
Bonsai TreeBonsai Tree
Bonsai TreeBonsai Tree
Bonsai TreeBonsai Tree
Bonsai TreeBonsai Tree
Japanese BonsaiJapanese Bonsai
PlantsPlants
SeedlingsSeedlings
SeedsSeeds
BromeliadsBromeliads
Cactus & SucculentsCactus & Succulents
Cactus PlantCactus Plant
PlantsPlants
SeedlingsSeedlings
SeedsSeeds
FernsFerns
Flower Bulbs, Roots & CormsFlower Bulbs, Roots & Corms
Bearded IrisBearded Iris
Tall BeardedTall Bearded
Tall Bearded IrisTall Bearded Iris
Tall IrisTall Iris
Flower Plants & SeedlingsFlower Plants & Seedlings
AnnualsAnnuals
BiennialsBiennials
PerennialsPerennials
Flower SeedsFlower Seeds
25 Seeds25 Seeds
AnnualsAnnuals
BiennialsBiennials
Bulk SeedsBulk Seeds
Flower Seeds GiftFlower Seeds Gift
PerennialsPerennials
Groundcovers & VinesGroundcovers & Vines
PlantsPlants
SeedlingsSeedlings
SeedsSeeds
Vine SeedsVine Seeds
HerbsHerbs
Herb SeedsHerb Seeds
PlantsPlants
SeedlingsSeedlings
SeedsSeeds
HouseplantsHouseplants
African VioletAfrican Violet
OrchidsOrchids
Cattleya OrchidCattleya Orchid
Orchid PlantOrchid Plant
Ornamental GrassesOrnamental Grasses
Ornamental GrassOrnamental Grass
OtherOther
RosesRoses
Shrub Flower PlantShrub Flower Plant
ShrubsShrubs
PlantsPlants
SeedlingsSeedlings
SeedsSeeds
TreesTrees
EvergreenEvergreen
Fruit/FloweringFruit/Flowering
NutNut
OtherOther
ShadeShade
TropicalsTropicals
Orchid PlantOrchid Plant
Orchid PlantOrchid Plant
Orchid PlantOrchid Plant
Orchid PlantOrchid Plant
Orchid PlantOrchid Plant
Orchid PlantOrchid Plant
PlantsPlants
SeedlingsSeedlings
SeedsSeeds
Vegetables & FruitsVegetables & Fruits
4 Tomato Plants4 Tomato Plants
PlantsPlants
Seed SeedsSeed Seeds
SeedlingsSeedlings
Seeds & BulbsSeeds & Bulbs
Tomato SeedsTomato Seeds
Publications & SoftwarePublications & Software
Watering EquipmentWatering Equipment

A typical young seedling consists of three main parts: the radicle (embryonic root), the hypocotyl (embryonic shoot), and the cotyledons (seed leaves). The two classes of flowering plants are distinguished by their numbers of seed leaves: Monocotyledons (monocots) have one blade-shaped cotyledon, whereas dicotyledons (dicots) have two round cotyledons. Gymnosperms are more varied. For example, pine seedlings have up to eight cotyledons. The seedlings of some flowering plants have no cotyledons at all. These are said to be acotyledons.

Germination and early seedling development

During germination, the young plant emerges from its protective seed coat with its radicle first, followed by the cotyledons. The radicle orients towards gravity, while the hypocotyl orients away from gravity and elongates through cell expansion to push the cotyledons out of the ground.

Photomorphogenesis and skotomorphogenesis

Dicot seedlings grown in the light develop short hypocotyls and open cotyledons exposing the epicotyl. This is also referred to as photomorphogenesis. In contrast, seedlings grown in the dark develop long hypocotyls and their cotyledons remain closed around the epicotyl in an apical hook. This is referred to as skotomorphogenesis or etiolation. Etiolated seedlings are yellowish in color as chlorophyll synthesis and chloroplast development depend on light. They will open their cotyledons and turn green when treated with light.

In a natural situation, seedling development starts with skotomorphogenesis while the seedling is growing through the soil and attempting to reach the light as fast as possible. During this phase, the cotyledons are tightly closed and form the apical hook to protect the shoot apical meristem from damage while pushing through the soil. In many plants, the seed coat still covers the cotyledons for extra protection.

Upon breaking the surface and reaching the light, the seedling's developmental program is switched to photomorphogenesis. The cotyledons open upon contact with light (splitting the seed coat open, if still present) and become green, forming the first photosynthetic organs of the young plant. Until this stage, the seedling lives off the energy reserves stored in the seed. The opening of the cotyledons exposes the shoot apical meristem and the plumule consisting of the first true leaves of the young plant.

The seedlings sense light through the light receptors phytochrome (red and far-red light) and cryptochrome (blue light). Mutations in these photo receptors and their signal transduction components lead to seedling development that is at odds with light conditions, for example seedlings that show photomorphogenesis when grown in the dark.

Read more at Wikipedia.org


[List your site here Free!]

Garden State Bulb Bowl of Beauty Peony Flower Bulbs, Bare Roots, Spring PlantingGarden State Bulb Bowl of Beauty Peony Flower Bulbs, Bare Roots, Spring Planting $26.24 to 20pcs Rare Purple and White Twin Rose Seeds - Captivating Garden Contrasts.20pcs Rare Purple and White Twin Rose Seeds - Captivating Garden Contrasts.
20pcs Tea Rose 'Dragon Tiger' Seeds - Fragrant, Vibrant Blooms for Gardeners20pcs Tea Rose 'Dragon Tiger' Seeds - Fragrant, Vibrant Blooms for Gardeners $4.95 12pcs Lotus Flower Seeds - Effortless Planting for Stunning Water Gardens12pcs Lotus Flower Seeds - Effortless Planting for Stunning Water Gardens $15.29
Alternifolia Cyperus Umbrella Aquatic Forms Clumps Wet And Boggys Areas 50 SeedsAlternifolia Cyperus Umbrella Aquatic Forms Clumps Wet And Boggys Areas 50 Seeds $5.95 Seasonal 30Pcs Bonsai Lotus Seeds - Grow Your Own Aquatic Flowering PlantsSeasonal 30Pcs Bonsai Lotus Seeds - Grow Your Own Aquatic Flowering Plants $14.99
50+Black Bamboo seeds Bamboo Bonsai Garden Home Decoration Cold Resistance Usa50+Black Bamboo seeds Bamboo Bonsai Garden Home Decoration Cold Resistance Usa $4.18 Aquatic Plants Lotus flower Seeds 30pcs Garden Bonsai Water Plant SeedsAquatic Plants Lotus flower Seeds 30pcs Garden Bonsai Water Plant Seeds $5.69
Water Mimosa Seeds, HẠT Rau NhÚT (Sensitive Plant), Neptunia oleracea 水含羞草Water Mimosa Seeds, HẠT Rau NhÚT (Sensitive Plant), Neptunia oleracea 水含羞草 $1.99 to Irish Moss Pearlwort Sagina Subulata - 2,000 Bulk SeedsIrish Moss Pearlwort Sagina Subulata - 2,000 Bulk Seeds $19.99
12,Helens,Parrots Feather,Plants Water Pond Makes A Oxygenator,Spawning Place12,Helens,Parrots Feather,Plants Water Pond Makes A Oxygenator,Spawning Place $20.00 1000+ Baby Blue Eyes Seeds Flower Groundcover Drought Tolerant Wildflower Spring1000+ Baby Blue Eyes Seeds Flower Groundcover Drought Tolerant Wildflower Spring $3.49
20pcs Purple Climbing Rose Seeds - Rare Non-Gmo Heirloom Variety for Your Garden20pcs Purple Climbing Rose Seeds - Rare Non-Gmo Heirloom Variety for Your Garden $4.95 10 Japanese Persimmon Tree Seeds (Diospyros Kaki) Asia Hardy Garden Fruit Plant10 Japanese Persimmon Tree Seeds (Diospyros Kaki) Asia Hardy Garden Fruit Plant $8.95
25pc Lisianthus Seeds Garden Plant Flower bed exotic Usa seller Free shipping25pc Lisianthus Seeds Garden Plant Flower bed exotic Usa seller Free shipping $8.53 30Pcs Seeds Lotus Mix Flower Seed Hand Picked Aquatic Plants Water Garden Seed30Pcs Seeds Lotus Mix Flower Seed Hand Picked Aquatic Plants Water Garden Seed $3.89
Easy-Grow 30Pcs Lotus Seeds for Water Lilies - Perfect for Garden & Pond SpacesEasy-Grow 30Pcs Lotus Seeds for Water Lilies - Perfect for Garden & Pond Spaces $14.91 300+ Rare Burning Bush Seeds Cold Hardy Grass Ornamental Hedge Free Shipping!300+ Rare Burning Bush Seeds Cold Hardy Grass Ornamental Hedge Free Shipping! $3.49
30-90Pcs Seeds Lotus Mix Flower Seed Hand Picked Aquatic Plants-Water Garden30-90Pcs Seeds Lotus Mix Flower Seed Hand Picked Aquatic Plants-Water Garden $3.88 to 30x Seeds Lotus Mix Flowers Seed Hand-Picked Aquatic Plants Water Garden Lotus30x Seeds Lotus Mix Flowers Seed Hand-Picked Aquatic Plants Water Garden Lotus $3.60
Eco-Friendly Seedling Propagator with Height Extensions - 24" x 15" MeasurementsEco-Friendly Seedling Propagator with Height Extensions - 24" x 15" Measurements $108.83 20 Seeds for Green/Red Center Lime citrus bush garden plant tree Usa Seller20 Seeds for Green/Red Center Lime citrus bush garden plant tree Usa Seller $8.25
Lemon Meyer Trees Live Starter Plants, Meyer Seedling, Rooted, Grown from SeedLemon Meyer Trees Live Starter Plants, Meyer Seedling, Rooted, Grown from Seed $8.99 to 100+ Scarlet Flame Creeping Phlox Seeds for Garden - Usa - Free Shipping!100+ Scarlet Flame Creeping Phlox Seeds for Garden - Usa - Free Shipping! $5.48
300pcs Mixed Eustoma Grandiflorum Bulbs Outdoor Flower Seeds Garden Decor Colors300pcs Mixed Eustoma Grandiflorum Bulbs Outdoor Flower Seeds Garden Decor Colors $8.89 Garden State Bulb Persian Lime Tree, Citrus Live Plant (1 Gallon Potted)Garden State Bulb Persian Lime Tree, Citrus Live Plant (1 Gallon Potted) $64.99
10pcs Lotus Seeds Mixed Color Bonsai Bowl Lotus Indoor Outdoor Aquatic Gardens.10pcs Lotus Seeds Mixed Color Bonsai Bowl Lotus Indoor Outdoor Aquatic Gardens. $8.95 Blooming 30Pcs Bowl Lotus Seeds - A Beginner's Choice for Easy Aquatic GardeningBlooming 30Pcs Bowl Lotus Seeds - A Beginner's Choice for Easy Aquatic Gardening $17.99
2 Aquatic Arrowhead Roots Ready To Plant2 Aquatic Arrowhead Roots Ready To Plant $19.99 Nurture Tranquility with 10pcs Bowl Lotus Seeds A Serene Marvel for Your IndoorNurture Tranquility with 10pcs Bowl Lotus Seeds A Serene Marvel for Your Indoor $4.95
1200+ Lavender Vera Seeds Spring Mosquito Insect Repellent Perennial Non-Gmo Usa1200+ Lavender Vera Seeds Spring Mosquito Insect Repellent Perennial Non-Gmo Usa $2.99 200+ Hollyhock Spring Mix Seeds Hummingbird Huge Flowers Bees Free Shipping200+ Hollyhock Spring Mix Seeds Hummingbird Huge Flowers Bees Free Shipping $3.59
Garden State Bulb Stella D'oro Daylily Flower Bulbs, Bare Roots, Spring PlantingGarden State Bulb Stella D'oro Daylily Flower Bulbs, Bare Roots, Spring Planting $22.49 to Flower Pot Tomatoes S/3Flower Pot Tomatoes S/3 $24.15
30 Non-Gmo Bonsai Lotus Seeds - Aquatic Plant for Stunning Gardens30 Non-Gmo Bonsai Lotus Seeds - Aquatic Plant for Stunning Gardens $17.99 20pcs Rare Ink Rose Seeds - Non-Gmo Heirloom Variety for Your Garden20pcs Rare Ink Rose Seeds - Non-Gmo Heirloom Variety for Your Garden $4.95
Easy-Grow Non-Gmo Lotus Seeds - 30 Count for Stunning Water Garden DisplaysEasy-Grow Non-Gmo Lotus Seeds - 30 Count for Stunning Water Garden Displays $14.84 100+ Blue Emerald Creeping Phlox Seeds for Garden - Usa - Free Shipping!100+ Blue Emerald Creeping Phlox Seeds for Garden - Usa - Free Shipping! $5.48
20pcs Ruby Green Twin Roses - Captivating Contrasts for Your Garden - Non-Gmo20pcs Ruby Green Twin Roses - Captivating Contrasts for Your Garden - Non-Gmo $4.95 Cultivate Your Garden Oasis with 100pcs Mixed Succulent Plant SeedsCultivate Your Garden Oasis with 100pcs Mixed Succulent Plant Seeds $4.95
200+ Asparagus Seeds Perennial Spring Garden Vegetable Heirloom Non-Gmo Usa200+ Asparagus Seeds Perennial Spring Garden Vegetable Heirloom Non-Gmo Usa $2.99 100pcs Eustoma Grandiflorum Seeds Outdoor Flower Seeds Garden Decor Plants100pcs Eustoma Grandiflorum Seeds Outdoor Flower Seeds Garden Decor Plants $3.98 to $3.99
60x Seeds Lotus Flower Seed Hand Picked Aquatic Plants Water Garden Lotus New60x Seeds Lotus Flower Seed Hand Picked Aquatic Plants Water Garden Lotus New $6.99 30x Seeds Lotus Mix Flowers Bonsai Hand Picked Aquatic Plants Water Garden Lotus30x Seeds Lotus Mix Flowers Bonsai Hand Picked Aquatic Plants Water Garden Lotus $3.95
25+ Sunburst Calathea Seeds for Garden Planting - Usa - Free Shipping!25+ Sunburst Calathea Seeds for Garden Planting - Usa - Free Shipping! $5.48 20pcs Rare Three-Color Rose Seeds for Home Potted Garden Vibrant Elegance Blooms20pcs Rare Three-Color Rose Seeds for Home Potted Garden Vibrant Elegance Blooms $4.95
500+ Rock Cress Seeds Royal Hummingbird Spring Mix Ground Cover Deer Resistant500+ Rock Cress Seeds Royal Hummingbird Spring Mix Ground Cover Deer Resistant $3.99 20pcs Red Climbing Rose Seeds - Rare Non-Gmo Heirloom Variety for Your Garden20pcs Red Climbing Rose Seeds - Rare Non-Gmo Heirloom Variety for Your Garden $4.95
Organic Satsuma Orange Tree Seedlings - Perfect for Home Gardeners!"Organic Satsuma Orange Tree Seedlings - Perfect for Home Gardeners!" $21.99 New Listing30 Non-Gmo Lotus Seeds for Easy Aquatic Gardening - Beautiful Water LiliesNew Listing30 Non-Gmo Lotus Seeds for Easy Aquatic Gardening - Beautiful Water Lilies $16.99
Garden State Bulb Blue Hosta Mix Bare Roots, Shade Perennial, Spring PlantingGarden State Bulb Blue Hosta Mix Bare Roots, Shade Perennial, Spring Planting $22.49 to 30Pcs Seeds Lotus Flower Seed Hand Picked Aquatic Plants Water Garden Lotus30Pcs Seeds Lotus Flower Seed Hand Picked Aquatic Plants Water Garden Lotus $3.88
3 Small Dawn Redwood Live Tree Seedling Garden 3 Plants3 Small Dawn Redwood Live Tree Seedling Garden 3 Plants $55.95 30pcs Lotus Mix Flower Seed Hand Picked Aquatic Plants Water Lotus Garden Decor30pcs Lotus Mix Flower Seed Hand Picked Aquatic Plants Water Lotus Garden Decor $3.90
Lotus Seeds Mixed Color Bonsai Bowl Lotus Indoor Outdoor Aquatic Gardens.Lotus Seeds Mixed Color Bonsai Bowl Lotus Indoor Outdoor Aquatic Gardens. $7.00 to All-in-One Heavy-Duty Propagation Station with Adjustable Vents and ExtensionsAll-in-One Heavy-Duty Propagation Station with Adjustable Vents and Extensions $108.92
20 Exotic rare Lily Seeds for garden flower perennial plant beds Usa Seller Usps20 Exotic rare Lily Seeds for garden flower perennial plant beds Usa Seller Usps $8.20 30Pcs Bowl Lotus Seeds Bonsai Lotus Seeds for Planting Water Lily Flower Aquatic30Pcs Bowl Lotus Seeds Bonsai Lotus Seeds for Planting Water Lily Flower Aquatic $22.50
20pcs Rare Purple Rose Seeds - Ideal for Home Gardens, Easy Germination20pcs Rare Purple Rose Seeds - Ideal for Home Gardens, Easy Germination $4.95 30Pcs Seeds Lotus Mix Flower Seed Hand Picked Aquatic Plants Water Garden Décor30Pcs Seeds Lotus Mix Flower Seed Hand Picked Aquatic Plants Water Garden Décor $3.87
100pcs Mixed Eustoma Grandiflorum Bulbs Outdoor Flower Seeds Garden Decor Plant100pcs Mixed Eustoma Grandiflorum Bulbs Outdoor Flower Seeds Garden Decor Plant $3.97 20pcs Scottish Green Rose Seeds - Non-Gmo Heirloom Variety for Your Garden20pcs Scottish Green Rose Seeds - Non-Gmo Heirloom Variety for Your Garden $4.95
25pc Lily Seeds Garden Plant Flower rare bloom exotic Usa seller Free shipping25pc Lily Seeds Garden Plant Flower rare bloom exotic Usa seller Free shipping $8.53
Click to see more Seedlings items at www.ebay.com
Prices current as of last update, 04/21/25 3:44am.

Home Contact Resources Exchange Links eBay