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Pore     [ Biology - Agronomy ]
Adjective: Porous  -  Porose
Noun: Porosity, Porousnees
Adverb: Porously

Dictionary of botanic terminology - index of names

     
  A pore, in general, is some form of opening in a material, usually very small and admitting passage of a fluid (liquid or gas)

 

 
1. Of soil: The open spaces or voids within a soil.  
2. Biology:

Any small opening in the skin or outer surface of an organism such as in plants, animals.

 
3. Botany: (Stoma) A minute epidermal opening in a leaf or stem through which gases and water vapour can pass  
4. Botany: The opening or end of the tube in some fungus where spores are released.  
       

Porous (Porose)
Synonym: Holey, Poriferous, Permeable, Absorbent.

     
 
  1. Permeable: A material, surface or substance that allows the passage of water or gases through small interconnected holes or vessels (pores) in the structure.
  2. Absorbent: Able to absorb fluids
 

 

Porose soil [Agronomy - Horticulture ]
Synonyms: Porous
compost  (substrate, potting mix, medium)

     
  A porous soil is a soil of usually granular composition that is full of tiny openings or channel way that is able to be filled (permeated) by water or air.  

A porous soil (or growing medium) is a soil that allows water and air to seep (or rise) thought it ensuring a good drainage and aeration. Compaction make a soil less porous. Hence the porosity is the measure of the amount of liquid or gas that may be absorbed or yielded by a particular soil or formation. Water cannot, by definition, travel through non-porous (impermeable) layers.
 

Porose capsule   [ Botany ]
     
  A dry dehiscent fruit, opening with pores or holes around the top. E.g. the fruit of a Poppy (Papaver).

 

 

 


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Holdfast roots  [ Botany  ]

Dictionary of botanic terminology - index of names

 
     
  Some species of climbing plants develop holdfast roots which help to support the vines on trees, walls, and rocks. By forcing their way into minute pores and crevices, they hold the plant firmly in place.  
     
Climbing plants, like the poison ivy (Toxicodendron radicans), Boston ivy (Parthenocissus tricuspidata), and trumpet creeper (Campsis radicans),  develop holdfast roots which help to support the vines on trees, walls, and rocks. By forcing their way into minute pores and crevices, they hold the plant firmly in place. Usually the Holdfast roots die at the end of the first season, but in some species they are perennial. In the tropics some of the large climbing plants have hold-fast roots by which they attach themselves, and long, cord-like roots that extend downward through the air and may lengthen and branch for several years until they strike the soil and become absorbent roots.

Major references and further lectures:
1) E. N. Transeau “General Botany” Discovery Publishing House, 1994
     

 

 

 

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