Chapter 38: Angiosperm Reproduction and Biotechnology

Slides:



Advertisements
Similar presentations
Plant Reproduction. Zygote (2n) M I T O S S I M E I O S S I Seed (disperses via wind or animals) Developing sporophyte Mature sporophyte flower (2n)
Advertisements

Plant Reproduction Chapter 31.
Modern Biology Chapter 32
Plant reproduction Chapter 38.
Angiosperm Reproduction and Biotechnology Chapter 38 p
PLANTS EVERYTHING YOU NEVER WANTED TO KNOW BUT NEEDED TO FOR THE AP EXAM.
Seed Formation in Gymnosperms & Angiosperms
Plant Adaptations for Success on Land Vascular tissue Evolution of the seed that provides food and protection Many methods of seed dispersal Evolution.
Chapter 38: Angiosperm Reproduction
ANGIOSPERMS Angiosperm means “covered seed” Have flowers
Evolution of the seed.
Chapter 38 Angiosperm Reproduction.
9.2 - Sexual Reproduction in Flowering Plants
Angiosperm Reproduction Chapter Recall: Alternation of Generations In angiosperms: – Sporophyte is dominant – Reduced gametophyte, dependent.
CHAPTER 30: PLANT DIVERSITY II the evolution of seed plants.
AP Biology Plant Reproduction. AP Biology The parasitic plant Rafflesia arnoldii (aka the corpse flower!)  Produces enormous flowers that can.
Chapter 37 Plant Nutrition & Soil.
Chapter 24 Reproduction in Plants. Alternation of Generations All plants have a life cycle in which a diploid sporophyte generation alternates with a.
THE LIFE CYCLE OF ANGIOSPERMS Packet #75 Chapter #38 Tuesday, December 08,
1 Figure 19.5 Alternation of Generations. Key Haploid (n) Diploid (2n) Protonemata (n) “Bud” Male gametophyte (n) Female gametophyte (n) Gametophore Rhizoid.
1. 2 Lecture 7 Outline (Ch. 38 – although some material is Ch. 30 in our text, pp ) I.Flower Structures II.Flower Development IV.Pollination V.Gametophyte.
Chapter 38 ~Plant Reproduction and Development. I. Sexual Reproduction n A. Alternation of generations: haploid (n) and diploid (2n) generations take.
Reproduction in Plants. Flower Reproductive structure of angiosperm Sporophyte – diploid  Produces haploid spores  Mitosis produces haploid gametophyte.
Plant Reproduction Chapter 31. Plants and Pollinators Pollen had evolved by 390 million years ago Pollen had evolved by 390 million years ago Sperm packed.
Aim: How are plants adapted to reproduce? Flower Alternation of Generations.
ALTERNATION OF GENERATIONS AND PLANT LIFE CYCLES Copyright © 2009 Pearson Education, Inc.
Stigma style ovary ovule megasporocyte micropyle The carpel.
14.4 The Life Cycle of Flowering Plants Biology 1001 November 25, 2005.
Title Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 29 Image Slides.
Plant Structure and Reproduction Double Fertilization.
Plant Reproduction.  Do not need to know page 773 or “structure of the mature seed”
Plant Reproduction. Gymnosperm Reproduction Typically, the male pine cones are quite small and develop near the tips of lower branches. Each scale of.
Sexual reproduction in the flowering plant (Extended study)
Chapter 38 n Plant Reproduction and Development. Sexual Reproduction n Alternation of generations: haploid (n) and diploid (2n) generations take turns.
Pollination and Fertilization in Flowering Plants
Faculty of Science, School of Sciences, Natabua Campus Lautoka BIO706 Embryology Lectures 21:Flowering Plant Reproduction - I.
Plant reproduction and how it works!
Faculty of Science, School of Sciences, Natabua Campus Lautoka
PLANTS EVERYTHING YOU NEVER WANTED TO KNOW BUT NEEDED TO FOR
Plant Reproduction and Development
Angiosperm Reproduction and Biotechnology
Flowers contain reproductive organs protected by specialized leaves.
Sexual reproduction in the flowering plant (Extended study)
Seed Plants Seed = embryo sporophyte, encased in and dispersed with gametophytic and maternal sporophytic tissues. Gymnosperms – seeds “naked” in cones.
Chapter 38: Angiosperm Reproduction
Chapter 30: Plant Diversity
Asexual Reproduction & Plant reproduction
Flowers contain reproductive organs protected by specialized leaves.
Fig
Plant life cycles alternate between producing spores and gametes.
Plant Reproduction.
Lecture #17 Date _________
Seed Plants Seed = embryo sporophyte, encased in and dispersed with gametophytic and maternal sporophytic tissues. Gymnosperms – seeds “naked” in cones.
The Cellular Basis of Inheritance: Life Cycles
Flowers contain reproductive organs protected by specialized leaves.
Magnoliophyta.
Reproduction in Flowering Plants
Angiosperm reproduction
Flowers contain reproductive organs protected by specialized leaves.
ANGIOSPERMS.
ALTERNATION OF GENERATIONS a defining feature of plants
Angiosperm Reproduction
AP Biology Chapter 38 Plant Reproduction and Development.
Chapter 38 ~ Plant Reproduction and Development
PLANTS EVERYTHING YOU NEVER WANTED TO KNOW BUT NEEDED TO FOR
Moss Life Cycle Figure 29.8 The life cycle of a moss Raindrop Sperm
Chapter 38: Angiosperm Reproduction
Sexual reproduction in the flowering plant (Extended study)
Flowers contain reproductive organs protected by specialized leaves.
Ch. 24- Reproduction of Seed Plants
Presentation transcript:

Chapter 38: Angiosperm Reproduction and Biotechnology 38.1 Admit Slip 3. List 3 words you think of when you look at the picture/diagram 2. Write 2 ideas you have based on the picture and your words. If possible, use your words as you write your ideas. 1. Write 1 question you have.

Angiosperm Life Cycle Remember the 3 F’s Flowers Fruits And double Fertilization

Pollen In the microsporangia (pollen sacs) of an anther, diploid cells undergo meiosis Produces haploid microspores Each microspore develops into male gametophyte (pollen grain)

Pollen Pollen grains have 2 haploid nuclei: Tube nucleus: produces the pollen tube, long cellular extension that delivers sperm to the female gametophyte, and eventually to the egg Generative nucleus- divides to yield 2 sperm cells which remain inside the pollen tube

In the Ovary Ovules form with a diploid cell that undergoes meiosis to produce 4 haploid megaspores. Only 1 survives and divides by mitosis 3 times to form 8 haploid nuclei 3 of these are important 1 haploid nucleus is the egg 2 haploid nuclei are the polar nuclei and fuse with a sperm to make a 3n endosperm

Female gametophyte (embryo sac) Development of a male gametophyte (in pollen grain) (b) Development of a female gametophyte (embryo sac) Microsporangium (pollen sac) Megasporangium (2n) Microsporocyte (2n) Ovule Megasporocyte (2n) MEIOSIS Integuments (2n) Micropyle 4 microspores (n) Surviving megaspore (n) Each of 4 microspores (n) MITOSIS Ovule Generative cell (n) Male gametophyte 3 antipodal cells (n) Female gametophyte (embryo sac) 2 polar nuclei (n) 1 egg (n) Nucleus of tube cell (n) Integuments (2n) 2 synergids (n) 20 µm Ragweed pollen grain Embryo sac 75 µm 100 µm

Pollination The transfer of pollen from an anther to stigma if successful, a pollen tube forms-grows down into the ovary

Pollination When the pollen tube reaches the ovary, 2 fertilization events (double fertilization) occur; One sperm fertilizes the egg forming the zygote (develops into the embryo and eventually sporophyte) One sperm combines with 2 polar nuclei forming a 3n nucleus=endosperm (food-storing tissue in the seed)

After Fertilization The ovule develops into a seed Ovary develops into a fruit The fruit protects the enclosed seed and aides in dispersal The endosperm is used to make cotyledons The seed coat protects the embryo and endosperm

Seed Maturation Seed enters dormancy Low metabolic rate Growth and development are suspended The seed will resume growth when there are suitable environmental conditions for germination