Plant Form and Function (BIO L325) – Reproduction.  For most of the slides you will view in today’s lab use your 40X lens (only after you use 4X and 10X to get the specimen into focus, or you may break the slide).  
 
REPRODUCTION
The process of reproduction in the flowering plants can be conveniently discussed under the following topic headings: (1) microsporogenesis: formation of the micorspore, (2) megasporogensis: formation of the megaspore, (3) microgametogenesis: formation of the microgametophyte (pollen grain), (4) megagametogenesis: formation of the megagametophyte (embryo sac), (5) fertilization: double fertilization in angiopsperms, and (6) embryogenesis: formation of the embryo from the zygote.
 
Microgametogenesis and Megagametogenesis
      Lilium - c.s. (flower bud)
            Note: sepals, petals, anthers pollen sacs, ovary, locules, ovules.
      Lilium (c.s flower bud): c.s.
            Note: flower bud and locate all four whorls of parts.  Identify the sepals, petals, anthers, pollen sacs, ovary, locule, ovules.
            Questions: 1. Based on the number of sepals, petals, stamens, and locules within the ovary would you classify Lilium as a monocot or
                                 eudicot?
                             2. The ovary of Lilium is composed of how many carpels?
      Lilium - c.s. (anther)
            Note: pollen sacs, sac wall, tapetum, microsporocytes.
            Question: What is the function of the tapetum?
      Lilium - c.s. (anther, pollen tetrads)
            Note: tetrad of pollen grains.
            Question: What is nuclear condition of each to the four cells in the tetrad?
      Lilium - c.s. (mature anther)  Note: exine, intine, generative cell, tube cell.
            Question: What two cells are produced when the generative cell divides?
      Lilium - c.s. (ovary)
            Note: funiculus, ovules (integuments, nucellus, megasporocyte).
            Question: 1. How many locules are present in each ovary?
                            2. Based on the number of locules, is Lilium a monocot or eudicot?
      Lilium - w.m. (pollen tube)  Note: pollen grain, tube, tube nucleus, sperm.
 
Megasporogenesis and Megagametogenesis
      Models - Note: all parts and stages discussed in lecture and lab.
 
Embryo and Seed
      Lima Bean Seed -preserved material; Note: seed coat, micropyle, hilum, raphe
      Capsella - l.s. (early embryo)
            Note: funiculus, seed coat, endosperm, embryo, suspensor, large basal cell.
      Capsella - l.s. (mature embryo)
            Note: seed coat, endosperm, basal cell, embryo (cotyledons, epicotyl, hypocotyl, radicle).
      Triticum - l.s. (kernel)
            Note: pericarp, endosperm, embryo (cotyledon, epicotyl, coleoptile, hypocotyl, radicle, coleorhiza).
            Question: What is another name for the cotyledon?