Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and...
-
Upload
osborne-leonard -
Category
Documents
-
view
214 -
download
0
Transcript of Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and...
![Page 1: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/1.jpg)
Root Zones and Tropisms
![Page 2: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/2.jpg)
Root functions
•Anchors the plant•Absorbs water and minerals•Sends water and minerals
to the xylem
![Page 3: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/3.jpg)
Parts of a root
Xylem carries water,Phloem carries food
![Page 4: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/4.jpg)
Parts of a root
Root hairs- absorb water and minerals
![Page 5: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/5.jpg)
Parts of a root
Area of Mitosis:growth
![Page 6: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/6.jpg)
Parts of a root
Root Cap:Digs into ground
![Page 7: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/7.jpg)
2 basic types of roots•1. Fibrous•Roots are tangled
together•Helps prevent
erosion
•2. TAPROOT•one long root, like
dandelion
![Page 8: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/8.jpg)
What is it?• Spanish
moss
![Page 9: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/9.jpg)
Root adaptations• A change that helps
an organism survive• 1. Aerial Roots• Grow above ground,
up in the air, suspended in a tree
• Usually in rain forest, can get water from air and rain
• Examples: Spanish moss, orchids
![Page 10: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/10.jpg)
Aerial roots
![Page 11: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/11.jpg)
Orchid
![Page 12: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/12.jpg)
More Spanish moss
![Page 13: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/13.jpg)
Why?• Tree canopy is 100-200 ft in air• Jungle floor is very dark
![Page 14: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/14.jpg)
![Page 15: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/15.jpg)
So an aerial root
• Can grow 150 ft up in the air• Without having to put down roots
into the soil• Can grow where the sunlight is
without competition from the trees
![Page 16: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/16.jpg)
What is unique about this plant?
![Page 17: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/17.jpg)
PROP roots
• Above ground roots, but most of root is underground
• Used to support a top heavy plant• Examples are corn and• Get ready, this is really really cool• Banyan tree• Ready?
![Page 18: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/18.jpg)
![Page 19: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/19.jpg)
All one treeroots grow out of branches to
support the weight
![Page 20: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/20.jpg)
TROPISMS
• Response to a stimulus• Controlled by chemical hormones
called auxins
![Page 21: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/21.jpg)
Hydrotropism
• Response to
•Water• Sketch:
![Page 22: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/22.jpg)
Phototropism
• Response to
•Light• Sketch:
![Page 23: Root Zones and Tropisms. Root functions Anchors the plant Absorbs water and minerals Sends water and minerals to the xylem.](https://reader030.fdocuments.us/reader030/viewer/2022032703/56649d045503460f949d83bb/html5/thumbnails/23.jpg)
Geotropism or gravitotropism
• Response to
•Gravity