Minnesota Nursery and Landscape Association (MNLA) Foundation

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Presentation transcript:

Minnesota Nursery and Landscape Association (MNLA) Foundation

BOTANY AND PLANT GROWTH LESSON 5 - PLANT PARTS AND FUNCTIONS PART 3 - rOOTS

Plant Parts and Functions Part Three: Roots Segment One – Functions of Roots Segment Two – Types of Roots Segment Three – Parts of Roots Segment Four – Roots as Food Crops Segment Five – The Root Zone

Segment One Functions of Roots To absorb nutrients and water To anchor the plant in the soil To serve as food storage organs

Segment Two Types of Roots taproot fibrous root

Segment Three Parts of a Root

Segment Three Parts of a Root Root Cap – functions to protect the delicate meristematic zone and the growing root tip; the root cap also lubricates the root tip to help foster root expansion through the soil. Meristematic Zone – the location of the apical meristem, a region where cells are actively dividing to enable growth of the root through the soil.

Segment Three Parts of a Root Zone of Elongation – the region just behind the meristematic zone where the new cells expand to there mature size. Zone of Maturation – the zone where cells differentiate to serve there ultimate functions in the developing root.

Segment Three Parts of a Root Root Hair Zone – the region of the root near the growing root tips where root hairs develop as the cells mature; root hairs are extensions of the epidermal cells that increase the surface area of the root dramatically and increase the ability to take up water and nutrients; the majority of water and nutrient uptake occurs in the root hair zone.

Segment Three Parts of a Root Crossectional diagrams of monocot and dicot roots Diagram produced by Robert Bear, David Rintoul, Root and Leaf Structure. OpenStax CNX. Mar 25, 2014

Segment Four The Root Zone A plant’s root system is not a mirror image of the crown Tree and shrub roots extend well beyond the drip line (the edge of the canopy). While some roots are found deeper in the soil, most roots occur in top 12” of soil.

Segment Five Roots as Food Crops Sweet Potato Carrot Parsnip Salsify Radish Sugar Beet

Review Plant Parts and Functions – Part Three Segment One – Functions of Roots Segment Two – Types of Roots Segment Three – Parts of a Root Segment Four – The Root Zone Segment Five – Roots as Food Crops

Review – Functions of Roots To absorb nutrients and water To anchor the plant in the soil To serve as food storage organs

Connect with horticulture and landscaping resources. Thank you for using the Pathways through Horticulture Curriculum, provided to Minnesota teachers free-of-charge, courtesy of the Minnesota Nursery & Landscape Association and the MNLA Foundation. For more information or to inquire about other resources offered by the MNLA Foundation, please contact: MNLA Foundation Office: 651-633-4987 Email: MNLA@MNLA.biz www.MNLAschoolhouse.org Connect with horticulture and landscaping resources. www.theLandLovers.org Your resource for careers in the green industry. These lessons were obtained through a purchase agreement between the Minnesota Nursery and Landscape Association (MNLA) and the Pennsylvania Landscape and Nursery Association (PLNA) and have been modified by the MNLA. The Pennsylvania Landscape and Nursery Association retains all original ownership rights and all copyrights. © 2005, Pennsylvania Landscape and Nursery Association. All Rights Reserved.