Plant Science Week 5. Flowers are found in many kinds of shapes, colors and petal display.
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Transcript of Plant Science Week 5. Flowers are found in many kinds of shapes, colors and petal display.
Monocot flowers
Wheat flowers
Wheat flowers are not so attractive, butthere is hope……check out the Easterlily, which is also a monocot flower
FlowersFlowers
Most flowers have four basic Most flowers have four basic components:components: SepalsSepals PetalsPetals StamensStamens PistilPistil
SepalsSepals
The outer most covering of a flower The outer most covering of a flower budbudProtect internal parts of flowerProtect internal parts of flowerFold back when flower opens and helps Fold back when flower opens and helps
support itsupport itIndividual sepals grouped together are Individual sepals grouped together are
known as the known as the calyxcalyx
PetalsPetals
Brightly colored modified leaves found Brightly colored modified leaves found in a circle just inside the in a circle just inside the calyxcalyxAttract insect pollinators because they Attract insect pollinators because they
secrete aromatic liquid, nectarsecrete aromatic liquid, nectarIndividual petals grouped together are Individual petals grouped together are
known as the known as the corollacorolla
StamensStamens
Male reproductive apparatus found just Male reproductive apparatus found just inside of corollainside of corollaConsists of anther and filamentConsists of anther and filament
AntherAnther is a pollen producing structureis a pollen producing structure Pollen, a yellowish powder, contains sperm cellsPollen, a yellowish powder, contains sperm cells
FilamentFilament supports and lifts anthersupports and lifts anther
PistilPistil
The female reproductive organ, The female reproductive organ, consisting of stigma, style and ovary, consisting of stigma, style and ovary, usually in the center of the flower, usually in the center of the flower, surrounded by the stamenssurrounded by the stamensTopped by a sticky structure known as Topped by a sticky structure known as stigmastigma where the pollen landswhere the pollen lands
Bottom of the pistil is a swollen base, Bottom of the pistil is a swollen base, the the ovaryovary, where seeds form from , where seeds form from fertilized ovulesfertilized ovules
Connecting the stigma and ovary is the Connecting the stigma and ovary is the stylestyle
Pollination and FertilizationPollination and Fertilization
PollinationPollination is the transfer of pollen is the transfer of pollen from an anther to a stigma and from an anther to a stigma and fertilizationfertilization is the uniting of a sperm is the uniting of a sperm with an egg.with an egg.
Let’s look at this flower again in Let’s look at this flower again in terms of pollination and fertilizationterms of pollination and fertilization
The pistil is The entire Female Reproductiveapparatus
The stamen is theEntire male Reproductive apparatus
Some Definitions
Flower
Pistil
Anther
Filament
Stamen
Pedicel
Recepticle
Sepal
Stigma
Style
Ovary
Reproductive organ of the plant
Female reproductive structure of a flower composed of one/more carpels
A part of the stamen that produces pollen
The stalk that supports the anther
The filament and anther together
The stalk of an individual flower (in an inflorescence)
The swollen tip of the pedicel where the flower parts are attached
One of the parts of the calyx
The sticky tip of the pistil
A column of tissue that connects the ovary and stigma
The structure that contains ovules