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Introduction to Botany. Lecture 19 Introduction to Botany. Lecture 19 Alexey Shipunov Minot State University October 18, 2017 Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 1 / 20 Outline 1 Questions and answers Quiz 2 Tissues Origin of tissues Tissues basics First tissues: parenchyma and epidermis Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 2 / 20 Outline 1 Questions and answers Quiz 2 Tissues Origin of tissues Tissues basics First tissues: parenchyma and epidermis Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 2 / 20 Questions and answers Quiz Questions and answers Quiz Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 3 / 20 (Shortest definition). Cell type. (However, complex tissues (below) are different.) Questions and answers Quiz Final question (2 points) What is a tissue? Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 4 / 20 Questions and answers Quiz Final question (2 points) What is a tissue? (Shortest definition). Cell type. (However, complex tissues (below) are different.) Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 4 / 20 Tissues Origin of tissues Tissues Origin of tissues Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 5 / 20 Why did plants go to the land? Which problems did they meet and how did they resolve them? What was the plant way of acquiring tissues comparing with animals? Tissues Origin of tissues Origin of tissues and organs of plants: first steps Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 6 / 20 Tissues Origin of tissues Origin of tissues and organs of plants: first steps Why did plants go to the land? Which problems did they meet and how did they resolve them? What was the plant way of acquiring tissues comparing with animals? Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 6 / 20 Tissues Tissues basics Tissues Tissues basics Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 7 / 20 Tissues Tissues basics Definition of tissues and organs Tissue is a union of cells which have common origin, function, and similar morphology Organ is a union of different tissues which have common function(s) and origin Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 8 / 20 Tissues Tissues basics Simple and complex tissues Simple tissues have only one kind of cells Complex tissues have more than one cell type. This tissue type is unique for plants Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 9 / 20 Tissues First tissues: parenchyma and epidermis Tissues First tissues: parenchyma and epidermis Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 10 / 20 Tissues First tissues: parenchyma and epidermis Parenchyma (ground, main tissue) Spherical or elongated cells Thin primary cell wall Sometimes, crystal inclusion bodies Main functions: photosynthesis and storage Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 11 / 20 Tissues First tissues: parenchyma and epidermis Parenchyma cells of a potato Parenchyma cells of a potato; the central cell shows obvious nucleus with starch stained purple (LM ×83) Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 12 / 20 Tissues First tissues: parenchyma and epidermis Parenchyma with crystals Parenchyma cells often include crystals (e.g., of calcium oxalate) Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 13 / 20 Tissues First tissues: parenchyma and epidermis Photosynthetic parenchyma Photosynthetic parenchyma (mesophyll) in lilac (Syringa vulgaris) leaf Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 14 / 20 Tissues First tissues: parenchyma and epidermis Epidermis: the complex tissue Complex tissue of different cell types: A Epidermal cells B Stomata cells: Guard cells Subsidiary cells C Trichomes Shapes and chemical compounds vary Main functions: gas exchange, transripration, defense Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 15 / 20 Tissues First tissues: parenchyma and epidermis Epidermal cells Three kinds of Shepard’s purse (Capsella bursa-pastoris) epidermal cells Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 16 / 20 Tissues First tissues: parenchyma and epidermis Stomata Stomata with guard cells and pores (Iris sp.) Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 17 / 20 Tissues First tissues: parenchyma and epidermis Summary The structure of plant body, its organs and tissues is a result of land colonization Complex tissues have different cell types, secondary tissues originate from lateral meristems (i.e., cambium) Parenchyma, or ground tissue, is a main component of young plant organs Epidermis is a complex tissue which includes stomata Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 18 / 20 What is the complex tissue? Tissues First tissues: parenchyma and epidermis Final question (2 points) Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 19 / 20 Tissues First tissues: parenchyma and epidermis Final question (2 points) What is the complex tissue? Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 19 / 20 Tissues First tissues: parenchyma and epidermis For Further Reading A. Shipunov. Introduction to Botany [Electronic resource]. Mode of access: http://ashipunov.info/shipunov/school/biol_154 Shipunov (MSU) Introduction to Botany. Lecture 19 October 18, 2017 20 / 20.
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