Morphology of Stems

0
1
Read Time:1 Minute, 29 Second
Introduction to Stems and External Features 

·         Stem is the axis of the plant other than the root
·         In most plants stems are located above the soil surface but some plants have underground stems

·         Functions of the stem
§  Stems support the leaves and other structures e.g. flowers, fruits 
§  Stems are used for vegetative reproductive i.e. cuttings
§  Stems position leaves to receive maximum sunlight
§  Stems determine size and shape of the plant
§  Facilitates movement of water, minerals, and manufactured food in the plant
§  Some stems carry out photosynthesis
§  Stores foods


·        External features of the stem
·         External structures of the stem
§  Internodes: distances separating one node from another
§  Nodes: Points at which leaves are attached
§  Lenticels: Breathing pores
§  Buds:Growth of shoot
§  Terminal or apical but, at tip of plant
§  Axillary bud in nodes on stem
§  Bud scale scars: Indicate where terminal bud has been located previous year
§  Leaf scars:
§  Show where leaf was attached
·          Internal structures of the stem
§  Usually consist of three tissues, Dermal tissue, Ground tissue and Vascular tissue

§  The dermal tissue
§  Covers outer surface of stem and usually functions to waterproof, protect & control gas exchange
§  The Ground tissue
§  Mainly of parenchyma cells and fills in around the vascular tissue, sometimes functions in photosynthesis
§  The Vascular tissue
§  Provides long distance transport and structural support
§  Arrangement varies widely among plant species

Selective Focus Photography of Green Leaf on Branch With Snow

Morphology of Stems 1 0 Morphology of Stems 2 0
Morphology of Stems 3

About Post Author

dominicbaitani

Is a content Creator, Website Developer Also is an expert in Advanced Digital Marketing
Happy
Happy
0 %
Sad
Sad
0 %
Excited
Excited
0 %
Sleppy
Sleppy
0 %
Angry
Angry
0 %
Surprise
Surprise
0 %

LEAVE A REPLY

Please enter your comment!
Please enter your name here

This site uses Akismet to reduce spam. Learn how your comment data is processed.