FC: Corn | and Pepper | Joanna Peng | Pepper | Corn
1: Seed Structure | Embryo: contained the radicle; primary root Cotyledon: seed leaf; absorbs food in the endosperm and transports it to the embryo Endosperm: food supply for the seeds | Day 1!
2: First Cotyledon! | 5/3/2012 | I've just started growing! My Mom moved me into my home - a wet paper towel. I've stayed in it for 2 days so far.
3: Pepper after germinating! | I germinated! My root hairs got intertwined with the paper towel...Mom almost broke my root off! She moved me into my new home thought - fertilized soil! | 5/7/2012
4: Germination Explained Factors that influence germination include : Water Availability, Oxygen availability, Temperature, Soil Quality, Light or Darkness, ABA and Gibberellin presence | Corn begins to germinate!
5: "A precious baby has come from above to live in our hearts and fill them with love." | 1 week old!
6: You've grown so much!
7: Day 6 First leaves! It took a while to finally grow them...Mom forgot to water me for 2 WHOLE days...I'm OK now though. I'm so proud of my green leaves! Photosynthesizing is so much fun!!
8: Young Plant Structure and Function | Terminal Bud: Otherwise known as the Apical Bud; primary growing point. Node: The point at which leaves are attached. Internode: The stem segments between nodes. Bud: A small swelling on a branch or stem, containing an undeveloped shoot, leaf, or flower. Cotyledon: A leaf of the embryo of a seed plant, which upon germination either remains in the seed or emerges, enlarges, and becomes green. Coleoptiles: A protective sheath enclosing the shoot tip and embryonic leaves of grasses.
9: Adventitious: Originates from stem or mesocotyl tissue to become part of fibrous root system Tap Root: Contains a thick central root Primary Root: Forms from the radicle and commonly grows to become the taproot Lateral Root: Branches off of the taproot Root Hairs: Increases the surface area of the root for greater absorption of water and nutrients Leaf: Cuticle and Dermal Tissue: Plants outer protective covering. The waxy cuticle layer prevents water loss | Taproot developing
10: Meristem: Perpetually embryonic tissues; capable of indeterminate growth Primary Growth: Allows roots to extend throughout the soil; vertical growth. Process by apical meristems Secondary Growth: Growth in thickness from lateral meristems Vascular Cambium: Adds layers of secondary xylem and phloem Cork Cambium: Replaces epiderm with coarser, thicker periderm Hormones: Auxin = stimulates stem elongation and lateral root growth Gibberellins = Stimulates stem enlongation and apical meristem development Gravitropism: Ensures root curves downward and shoot bends upward | Pepper, age 1.5 weeks
11: Nutrient and Water Delivery Transpiration and Turgor Pressure: Transpiration is the evaporation of water from plants. Turgor Pressure is force exerted outward on a plant cell wall, giving the plant rigidity. | vascular Tissue carries out long-distance transport of materials between the root and shoot systems. | Xylem conducts water and dissolved minerals upward from roots to shoots. Structurally made of tracheids and vessel elements Stomata and Guard Cells: Controls gas exchange between surrounding air and leaf. GC's regulate the opening and closing of the stomata, which are major avenues for water evaporation. | Plants grow by absorbing nutrients from the soil. Soil contains a nutrient-mixture of silt, sand, clay and organic matter. The Casparian Strip is made of suberin, a waxy material impervious to water and dissolved minerals. Blocks minerals that reach the endodermis via the apoplast. | Close-up of a stem at work
12: Pepper, at 11 days! | 5/12/2012 It seems as if my cotyledons grew SO long ago...check out my new internodes!
13: Pepper 5 days | 5/6/2012 At 5 days, I just started to grow root hairs! Should I shave them off?
14: OUR SWEET BABY | Food Delivery | Phloem The phloem transports sugar and organic materials from leaves to roots. Made of sieve-tube elements and companion cells. | Translocation is the process of transporting sugars from mature leaves to root tips. | I love you.
15: Haploid Gametophyte, so named for its production by mitosis of haploid gametes, or eggs and sperm. The gametes fuse in fertilization, forming a diploid zygote. | A multicellular diploid sporophyte is produced by the mitotic division of the zygote. Meiosis of the sphorophyte produces haploid spores, reproductive cels that can develop into a new haploid organism. | Mitotic division of the spore cells produces a new multicellular gametophyte, and the cycle continues. | corny, week 2
16: Reproduction Described and Explained
17: The carpel consists of the ovary, that contains ovules, at its base, and a long, slender neck called the style. On top of the style is the stigma, a sticky structure that serves as a landing platform for pollen. | A stamen consists of an anther, a terminal structure that contains microsporangia that produce pollen, and a filament, the stalk. | The sepals and petals are sterile; the sepal encloses and protects the floral bud before it opens. It is leaf-like and green. Petals are usually brightly colored to attract pollinators and insects. | Ovules are located in the ovary, and are fertilized by pollen after it attaches to the stigma | Double Fertilization When a pollen grain lands on the stigma, it germinates and grows a thin pollen tube down the style, which reaches the ovary. The pollen grain then divides into 2 sperm nuclei. On sperm nucleus fuses with the egg nucleus to form the zygote. The other sperm nucleus will fuse with 2 polar nuclei to form an endosperm, which will serve as food for the plant embryo.
18: The final product! I'm a pretty tall plant, due to my developed stem. I've grown a little to the right, however, because of phototropism. | Pepper, 5/20/2012
19: Corn, 5/20/2012 | The final product! My leaves are so long. My stem is longer than Pepper! I've always grown faster than him - I germinated first, and developed my cotyledon, leaves and primary roots first too!
20: Dicot Characteristics: Two Cotyledons Veins usually netlike Vascular Tissue usually arranged in ring Taproot usually present Pollen grain with 3 openings Floral organs usually in multiples of 4 or 5 | Monocot Characteristics: One cotyledon Veins usually parallel Vascular tissue scattered | Family Relationships | Root system usually fibrous Pollen grain with one opening Floral organs in multiples of 3 | Barley | Dog rose | Cali Poppy | Orchid | Snow Pea
21: All Grown Up!