practical general biology n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Practical General Biology PowerPoint Presentation
Download Presentation
Practical General Biology

Loading in 2 Seconds...

play fullscreen
1 / 35

Practical General Biology - PowerPoint PPT Presentation


  • 78 Views
  • Uploaded on

Practical General Biology . The Stem , The Root and The Leaf 2012_2013 . The Stem . Function of Stem : Stems support photosynthetic leaves and reproductive structures, thus increasing photosynthetic and reproductive efficiency. Stems supply water and minerals to shoots .

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Practical General Biology' - cissy


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
practical general biology

Practical General Biology

The Stem , The Root and The Leaf

2012_2013

the stem
The Stem

Function of Stem :

  • Stems support photosynthetic leaves and reproductive structures, thus increasing photosynthetic and reproductive efficiency.
  • Stems supply water and minerals to shoots .
the dicotolydonous stem dicot stem
The Dicotolydonous Stem (Dicot stem)

Component of dicot stem :

  • Epidermis, ground tissue (paranchyma, collenchyma, sclerenchuma, cortex, pith), vascular tissue (xylem, phloem ).
  • Protoxylem vessels : are the smallest vessels, their typical location is towards the pith.
  • Metaxylem vessels: are the larger vessels, their typical location is towards the cortex.
  • Fascicular cambium : is the area between the primary xylem and phloem .
  • Organization of bundle .
the monocot stem
The Monocot Stem

Component of monocot stem :

  • Epidermis, ground tissue (paranchyma, collenchyma, sclerenchuma), vascular tissue (xylem, phloem ).
  • Random arrangement of the vascular bundles, and its surrounding by sclerenchyma .
  • Not have secondary growth.
  • Xylem the same of V.
  • No have cortex and pith .
  • No have cambium layer .
the monocot root
The Monocot Root
  • A count of metaxylem if this above 8 it’s monocot root .
  • The roots of monocots are organized into a cortex, with primary xylem and primary phloem in central pith .
  • Not have secondary growth, because absent of cambium .
  • The area of pith are largest, and the phloem is combination with protoxylem .
  • Thicker from one side and have Casparian .
the dicot root
The Dicot Root
  • Number of vascular bundle from 4 to 5 only .
  • Have secondary growth and cambium it’s present .
  • Not have pith .
  • Phloem arrangement with xylem arm to formation vascular bundle .
  • Thicker form all side .
  • Have passage cell .
the monocot leaf
The Monocot Leaf
  • The vascular bundle it’s spread in the leaf .
  • Not differentiation of Mesophyll .
  • Distribution of Stomata it’s equal in the upper and lower of leaf .
  • Vascular bundles are enclosed by scalarenchyma .
  • Stomata are damples shape .
  • Have buliform cells .
  • Xylem are V shape .
  • venation in the leaf blade : Parallel venation .
the dicot leaf
The Dicot Leaf
  • Stomata are distribution in lower more than in upper.
  • Stomata are kidney shape .
  • Have not buliform cell in upper epidermis .
  • Mesophyll is homogenus and are distinguished between Palisade and Spongyparanchyma.
  • Vascular bundles are large and central and phloem is toward the lower epidermis .
slide29

The collenchyma present in upper and lower .

  • Waxy layer in upper epidermis are thicker .
  • Waxy layer in lower epidermis are thinner, because have stomata .
  • Have not scolarenchyma .
  • Venation in the leaf blade : Network venation .