plant%20tissues.pptx
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This document provides an overview of plant tissues, including meristematic tissues, simple tissues, and complex tissues. Meristematic tissues are regions of cell division found at the tips of stems and roots that facilitate growth. Simple tissues include parenchyma, collenchyma, sclerenchyma, epidermis, and trichomes. Complex tissues include xylem, phloem, periderm, and secretory structures. Xylem transports water, phloem transports food, and periderm provides protection. Secretory structures produce substances like latex, resin, and nectar.
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Plant tissues
Plant tissues can be divided into three main types: meristematic tissues, simple tissues, and complex tissues. Meristematic tissues contain actively dividing cells and are found in areas of growth like apical and lateral meristems. Simple tissues consist of one cell type like parenchyma, collenchyma, and sclerenchyma. Complex tissues are more specialized tissues like xylem, phloem, and periderm which are composed of multiple cell types organized into structures.
Plant tissues (tbp)
The document provides an overview of plant tissues, including meristematic tissues that allow for growth, simple tissues like parenchyma and sclerenchyma, and complex tissues like xylem, phloem, and vascular bundles. Key points covered include the role of the apical and lateral meristems in primary and secondary growth, the process of cell division through mitosis and cytokinesis, and examples of simple and complex tissue types and their functions.
Plant tissues
Plant tissues can be divided into meristematic tissues, which are regions of cell division found at tips of stems and roots, simple tissues consisting of one cell type like parenchyma and epidermis, and complex tissues like xylem and phloem that transport water and nutrients. Meristematic tissues include apical and lateral meristems responsible for primary and secondary growth. Simple tissues are made of cells like parenchyma, collenchyma, and sclerenchyma. Complex tissues contain specialized cells that form the vascular system and secretory structures that produce substances like latex or nectar.
Plant tissues
Meristematic tissues are regions of cell division that give rise to primary tissues like epidermis and vascular tissue through apical and lateral meristems. Simple tissues are made of one cell type like parenchyma, collenchyma, and sclerenchyma. Complex tissues include xylem, phloem, periderm, and secretory structures that transport substances and provide structure and protection.
Plant tissues
The document discusses plant tissues and meristems. It describes the three main types of meristems - apical, lateral, and intercalary meristems - and their roles in primary and secondary growth. It also outlines the simple permanent tissues of parenchyma, collenchyma, sclerenchyma, and epidermis. Complex vascular and dermal tissues like xylem, phloem, and periderm are also summarized. Secretory structures are briefly mentioned. Diagrams accompany the descriptions of tissue types and organization.
Day 1
Plant tissues are organized into three main systems - ground, vascular, and dermal tissues. The ground tissue system includes parenchyma, collenchyma, and sclerenchyma tissues and is responsible for photosynthesis, storage, and support. The vascular tissue system includes xylem and phloem tissues and is responsible for transporting water, minerals and sugars. The dermal tissue system includes epidermis and periderm tissues and protects the plant.
Plant form & function part 1
1) Plants have meristematic tissues that allow for indeterminate growth, including apical meristems at the tips of roots and shoots that initiate primary growth.
2) There are three primary meristem types - protoderm, procambium, and ground meristem - that give rise to the primary plant body.
3) Meristematic cells later differentiate into various cell types like parenchyma, collenchyma, and sclerenchyma cells that make up the different plant tissues.
Plant Anatomy types tissue
This document provides information about plant tissues, including meristematic and permanent tissues. It discusses the characteristics and classifications of meristematic tissue, including apical, lateral, and intercalary meristems. Simple permanent tissues are described as parenchyma, collenchyma, and sclerenchyma. Complex permanent tissues include xylem, which transports water and minerals, and phloem, which transports organic substances. Xylem elements are described as vessels, tracheids, parenchyma, and fibers. Phloem elements include sieve tubes, sieve cells, companion cells, parenchyma, and fibers.
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Plant tissues
Plant tissues can be divided into three main types: meristematic tissues, simple tissues, and complex tissues. Meristematic tissues contain actively dividing cells and are found in areas of growth like apical and lateral meristems. Simple tissues consist of one cell type like parenchyma, collenchyma, and sclerenchyma. Complex tissues are more specialized tissues like xylem, phloem, and periderm which are composed of multiple cell types organized into structures.
Plant tissues (tbp)
The document provides an overview of plant tissues, including meristematic tissues that allow for growth, simple tissues like parenchyma and sclerenchyma, and complex tissues like xylem, phloem, and vascular bundles. Key points covered include the role of the apical and lateral meristems in primary and secondary growth, the process of cell division through mitosis and cytokinesis, and examples of simple and complex tissue types and their functions.
Plant tissues
Plant tissues can be divided into meristematic tissues, which are regions of cell division found at tips of stems and roots, simple tissues consisting of one cell type like parenchyma and epidermis, and complex tissues like xylem and phloem that transport water and nutrients. Meristematic tissues include apical and lateral meristems responsible for primary and secondary growth. Simple tissues are made of cells like parenchyma, collenchyma, and sclerenchyma. Complex tissues contain specialized cells that form the vascular system and secretory structures that produce substances like latex or nectar.
Plant tissues
Meristematic tissues are regions of cell division that give rise to primary tissues like epidermis and vascular tissue through apical and lateral meristems. Simple tissues are made of one cell type like parenchyma, collenchyma, and sclerenchyma. Complex tissues include xylem, phloem, periderm, and secretory structures that transport substances and provide structure and protection.
Plant tissues
The document discusses plant tissues and meristems. It describes the three main types of meristems - apical, lateral, and intercalary meristems - and their roles in primary and secondary growth. It also outlines the simple permanent tissues of parenchyma, collenchyma, sclerenchyma, and epidermis. Complex vascular and dermal tissues like xylem, phloem, and periderm are also summarized. Secretory structures are briefly mentioned. Diagrams accompany the descriptions of tissue types and organization.
Day 1
Plant tissues are organized into three main systems - ground, vascular, and dermal tissues. The ground tissue system includes parenchyma, collenchyma, and sclerenchyma tissues and is responsible for photosynthesis, storage, and support. The vascular tissue system includes xylem and phloem tissues and is responsible for transporting water, minerals and sugars. The dermal tissue system includes epidermis and periderm tissues and protects the plant.
Plant form & function part 1
1) Plants have meristematic tissues that allow for indeterminate growth, including apical meristems at the tips of roots and shoots that initiate primary growth.
2) There are three primary meristem types - protoderm, procambium, and ground meristem - that give rise to the primary plant body.
3) Meristematic cells later differentiate into various cell types like parenchyma, collenchyma, and sclerenchyma cells that make up the different plant tissues.
Plant Anatomy types tissue
This document provides information about plant tissues, including meristematic and permanent tissues. It discusses the characteristics and classifications of meristematic tissue, including apical, lateral, and intercalary meristems. Simple permanent tissues are described as parenchyma, collenchyma, and sclerenchyma. Complex permanent tissues include xylem, which transports water and minerals, and phloem, which transports organic substances. Xylem elements are described as vessels, tracheids, parenchyma, and fibers. Phloem elements include sieve tubes, sieve cells, companion cells, parenchyma, and fibers.
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Selaginella, commonly known as club moss or spike moss, is a genus of vascular plants that has worldwide distribution, especially in tropical regions. It reproduces both sexually and asexually. The plant body is differentiated into roots, stems, microphyllous leaves, and ligules. The stems are green and branched. Microspores and megaspores are produced in sporangia and develop into male and female gametophytes, respectively, through precocious germination. Fertilization occurs when sperm from the male gametophyte fuses with eggs in the female gametophyte, forming a diploid sporophyte.
General plant organization
The document summarizes the major organ systems and tissues found in plants. It discusses that plants have two organ systems - the shoot system above ground which includes leaves, stems, flowers, and fruits, and the root system below ground which includes roots, tubers, and rhizomes. It then describes the three main tissue types found in plants - dermal tissue which covers the outer surface, ground tissue which comprises the bulk of the plant, and vascular tissue which transports materials within the plant. It provides details on key cell types that make up these tissues, including parenchyma, collenchyma, sclerenchyma, xylem, phloem and epidermal cells.
Tissues
There are four main types of tissues in both plants and animals: meristematic tissue, permanent tissue, epithelial tissue, and connective tissue.
Meristematic tissue consists of actively dividing cells and is found at growth points in plants such as the root tip and shoot tip. Permanent tissues, including complex tissues like xylem and phloem, are composed of differentiated cells that have lost the ability to divide. Epithelial tissues cover the internal and external surfaces of both plants and animals, while connective tissues provide structure and binding functions.
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There are four main types of tissues in plants and animals:
1. Meristematic tissue, found at growing tips of stems and roots, is composed of actively dividing cells responsible for growth.
2. Permanent tissues have differentiated cells that perform specific functions and do not divide. These include simple tissues like parenchyma and complex tissues like xylem and phloem.
3. The four main animal tissues are epithelial, connective, muscle and nervous tissue. Epithelial tissue lines surfaces, connective tissue connects and supports, muscular tissue enables movement, and nervous tissue conducts electrical signals.
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The document discusses plant tissues and types of plant tissues. There are three main types of plant tissues: dermal tissue (epidermis), ground tissue (parenchyma, collenchyma, sclerenchyma), and vascular tissue (xylem and phloem). Meristematic tissue consists of actively dividing cells and is responsible for growth in plants. Meristematic tissue differentiates into permanent tissues, which include simple tissues like parenchyma, collenchyma, and sclerenchyma, as well as complex vascular tissues.
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The document discusses the different types of plant tissues. There are three main types of plant tissues: dermal tissue (epidermis), ground tissue (parenchyma, collenchyma, sclerenchyma), and vascular tissue (xylem and phloem). Xylem tissue transports water and minerals throughout the plant. Phloem tissue transports sugars and nutrients. Meristematic tissue consists of actively dividing cells and is responsible for growth in plants. As cells differentiate, they take on specialized roles and functions as part of the permanent tissues that make up the main tissue systems in plants.
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Meristems are undifferentiated tissues that retain the ability to divide indefinitely and add new cells. There are three main types - apical meristems at tips that add new cells, intercalary meristems between tissues that allow elongation, and lateral meristems like vascular cambium that add girth. Apical meristems follow the tunica-corpus model with outer layers adding surface area and inner layers adding volume. Root apices have initial cells that form distinct tissue layers close to the tip or more open organization farther out.
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Meristematic tissues are composed of immature, dividing cells found at growing tips and edges of roots and shoots. They are classified based on position, origin, function, and growth patterns. Apical meristems at tips increase length, while intercalary and lateral meristems produce leaves/flowers and increase diameter through secondary growth. Primary meristems develop directly from embryos, while secondary meristems resume activity in mature tissues. Meristems function as protoderm, procambium, or ground meristem to form epidermis, vascular tissue, or ground tissues, respectively. They exhibit mass, rib, or plate growth patterns through cell divisions.
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Plant tissues are divided into meristematic and permanent tissues. Meristematic tissue consists of actively dividing cells found in growing regions and increases plant length. It is classified as apical or lateral based on location. Permanent tissues include epidermal, vascular and ground tissues. Vascular tissue transports substances throughout the plant and is divided into xylem and phloem. Xylem transports water and minerals upward and phloem transports sugars downward. Ground tissue provides support, storage and synthesis of organic compounds. It includes collenchyma, parenchyma and sclerenchyma cells.
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Selaginella, commonly known as club moss or spike moss, is a genus of vascular plants that has worldwide distribution, especially in tropical regions. It reproduces both sexually and asexually. The plant body is differentiated into roots, stems, microphyllous leaves, and ligules. The stems are green and branched. Microspores and megaspores are produced in sporangia and develop into male and female gametophytes, respectively, through precocious germination. Fertilization occurs when sperm from the male gametophyte fuses with eggs in the female gametophyte, forming a diploid sporophyte.
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There are four main types of tissues in both plants and animals: meristematic tissue, permanent tissue, epithelial tissue, and connective tissue.
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Plant anatomy is the study of internal plant structure and organization. There are two main tissue types: meristematic and permanent tissues. Meristematic tissues are made of actively dividing cells found in growth zones, and can be classified based on position, origin, function, and plane of division. Permanent tissues develop from meristematic tissues and lose the ability to divide. The two types of permanent tissues are simple tissues composed of one cell type (parenchyma, collenchyma, sclerenchyma), and complex tissues with multiple cell types. Parenchyma is the most common simple tissue and can be storage, aeration or photosynthetic. Collenchyma and sclerenchyma provide
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This document summarizes plant anatomy and tissue types. It discusses the different types of meristems, fundamental tissues like parenchyma, collenchyma and sclerenchyma, and conducting tissues like xylem and phloem. Key points covered include the different types of meristems based on location and origin, the tissues of the root apex versus shoot apex, the characteristics and origins of parenchyma, collenchyma and sclerenchyma tissues, and the components and specializations of xylem and phloem conducting tissues.
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The ability to recreate computational results with minimal effort and actionable metrics provides a solid foundation for scientific research and software development. When people can replicate an analysis at the touch of a button using open-source software, open data, and methods to assess and compare proposals, it significantly eases verification of results, engagement with a diverse range of contributors, and progress. However, we have yet to fully achieve this; there are still many sociotechnical frictions.
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Our observation is that multiple layers — hardware, operating systems, third-party libraries, software versions, input data, compile-time options, and parameters — are subject to variability that exacerbates frictions but is also essential for achieving robust, generalizable results and fostering innovation. I will first review the literature, providing evidence of how the complex variability interactions across these layers affect qualitative and quantitative software properties, thereby complicating the reproduction and replication of scientific studies in various fields.
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I will finally argue that deep variability is both the problem and solution of frictionless reproducibility, calling the software science community to develop new methods and tools to manage variability and foster reproducibility in software systems.
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留信网认证的作用:
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2:同时对留学生所学专业登记给予评定
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- 1. Plant Tissues: Overview Meristems, Simple Tissues, & Complex Tissues Many of the figures found in this presentation are from the internet site http://botit.botany.wisc.edu/images/130/ and a CD entitled “Plant Anatomy” by Richard Crang & Andrey Vassilyev published by McGraw Hill.
- 2. Meristematic tissues – localized regions of cell division Apical Meristems Primary or Transitional Meristem Primary growth Protoderm gives rise to epidermis Ground meristem gives rise to ground tissue Procambium gives rise to 1 o vascular tissue Lateral Meristems Vascular cambium 2 o vascular tissue Cork cambium or phellogen periderm Intercalary Meristems (found in the nodes of grasses)
- 3. Illustration from: http://biology.nebrwesleyan.edu/benham/mitosis/ 1. Interphase 2. Prophase 3. Metaphase 4. Anaphase 5. Telophase 6. Cytokinesis Cell Division: Mitosis (nuclear division) + Cytokinesis (cytoplasmic division)
- 5. Root Apical Meristem 1. Root cap initials 2. Protoderm 3. Ground meristem 4. Procambium 5. Root cap
- 6. Lateral Meristems – secondary growth in woody plants Basswood – root in cross section Basswood – stem in cross section; 1, 2, 3 year old stems
- 7. Intercalary Meristems in Grasses http://www2.mcdaniel.edu/Biology/wildameric a/grasslands/graslandoutline.html
- 8. Simple Tissues – consisting of one cell type Parenchyma – thin walled & alive at maturity; often multifaceted. Collenchyma – thick walled & alive at maturity Sclerenchyma – thick walled and dead at maturity Sclerids or stone cells – cells as long as they are wide Fibers – cells longer than they are wide Epidermis – alive at maturity Trichomes – “pubescence” or hairs on epidermis Root Hairs – tubular extensions of epidermal cells
- 9. Parenchyma
- 10. Collenchyma
- 11. Sclerenchyma Right-hand illustration modified from: Weier, Stocking & Barbour, 1974, Botany: An Introduction to Plant Biology, 5th Ed. SCLERIDS FIBERS
- 12. Epidermis – stoma, trichomes, & root hairs http://www.ucd.ie/botany/Steer/hair/roothairs.html
- 16. Complex Tissue Xylem – water conducting tissue; parenchyma, fibers, vessels and/or tracheids, and ray cells. Phloem food conducting tissue; sieve-tube members (no nucleus at maturity, cytoplasm present), companion cells, fibers, parenchyma, and ray cells. In flowering plants, sieve-tube members and companion cells arise from the same mother cell. Periderm – protective covering; composed of cork and parenchyma. Secretory structures – responsible for making latex, resins, nectar and other substances produced and stored in channels inside the plant body.
- 17. Xylem
- 18. Phloem
- 21. Vascular Bundles with xylem & phloem Maize or Corn – vein in cross section Alfalfa – vein in cross section
- 22. Periderm – cork & parenchyma TWIG WITH LENTICELS
- 23. Secretory Structures nectar (flowers) from nectaries oils (peanuts, oranges, citrus) from accumulation of glands and elaioplasts. resins (conifers) from resin canals lacticifers (e.g., latex - milkweed, rubber plants, opium poppy) hydathodes (openings for secretion of water) digestive glands of carnivorous plants (enzymes) salt glands that shed salt (especial in plants adapted to environments laden with salt).