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http://indianaquariumhobbyist.com/community/ :: View topic - Best light for red plants
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Best light for red plants
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mod-the-pc
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Joined: Oct 07, 2008
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PostPosted: Tue Feb 24, 2009 6:06 pm Post subject: Re: Best light for red plants Reply with quote

                                                   
Madan  wrote  (View  Post):                
Give  plants  enough  light  and  they  will  turn  red.  Red  pigmentation  is  a  stress  reaction  in  plants.
 Excess  light  they  do  not  require  chlorophyll  to  photosynthesize  so  much,  they  turn  red.                
 Very  true,  my  Hygrophila  Polysperma  had  lush  green  leaves  which  turned  pink  once  I  bumped  up  the  light.
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Shreyasmrao
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PostPosted: Tue Feb 24, 2009 6:51 pm Post subject: Re: Best light for red plants Reply with quote

 Mr.  Madan,  thank  you  for  the  clarification.  I  was  however  wondering  about  the  redness  in  plants...
 
 Why  are  only  some  plants  red  and  the  neighbouring  plants  green,  if  it  is  only  a  reaction  to  light.  I  understand  their  requirement  levels  are  different  like  any  other  living  being,  but  is  there  something  like  red  chlorophyll  (I  have  no  clue  on  this  subject,  please  excuse  the  dumb  question)  which  causes  the  plants  to  turn  red,  and  some  of  them  more  than  the  others.
 
 This  topic  is  very  interesting  to  me  especially  because  I  love  red  plants.
 
 @Madhu  and  Sandeep,  all  the  time  I  was  talking  about  the  penetration  of  light  in  water  only  and  not  in  air,  where  the  case  is  completely  different  as  explained  by  Mr.  Madan  above  (and  of  which  I  had  no  idea).
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Manu1979
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PostPosted: Thu Feb 26, 2009 12:41 am Post subject: Re: Best light for red plants Reply with quote

 Thank  You  Madan  Sir.  It  means  I  should  increase  the  intensity  of  light  to  keep  the  red  color  of  the  plants?
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tigermath
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PostPosted: Sat Apr 18, 2009 12:34 pm Post subject: Re: Best light for red plants Reply with quote

 nice.
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joyban
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PostPosted: Mon Apr 20, 2009 6:33 pm Post subject: Re: Best light for red plants Reply with quote

 Red  Pigmentation  is  caused  by  Flavenoids,  which  protect  the  plants  from  the  damaging  effect  of  ultra  violet  light
 Plants  produced  more  of  this  chemical  in  sunshine  than  underwater.  The  red  colour  was  there  to  protect  them  from  the  bright  light  and  specifically  from  ultra  violet  light.
 
 Flavonoids  are  phenolic  compounds  used  by  plants  as  visual  and  olfactory  attractants.  Anthocyanins  are  flavonoids  that  are  the  source  of  most  red,  pink,  purple,  and  blue  colors  in  plant  parts,  including  the  many  red  varieties  of  Echinodorus  and  Cryptocorynes.
 
 The  epidermis  of  the  leaves  of  all  plants  contains  flavonoids  that  protect  against  UV-B  radiation  (280-320  nm).  These  compounds  absorb  light  in  the  UV-B  range  but  allow  visible  light  to  pass  through  uninterrupted  for  photosynthesis.  
 
 Effectively  these  red  plants  which  are  using  all  their  energy  to  produce  flavenoids  to  protect  themselves  rather  than  grow  vigorously.
 
 Many  believed  that  red  plants  needed  extra  light  as  the  red  pigment  blocked  the  green  pigment  and  prevented  chlorophyll  from  being  produced  and  therefore  extra  light  was  necessary.  
 
 Plants  will  grow  quite  happily  in  daylight  and  any  good  white  light  although  they  will  stay  -  or  revert  to  -green.
 
 That  is  why  lot  of  these  plants  turn  Green  under  the  Light  that  we  use,  so  the  best  light  for  these  plants  will  be  those  lamps  that  also  have  a  component  if  UV-B  radiation  in  them  ....
 
 A  good  lamp  would  be  one  which  has  a  good  intensity  of  UV-Blue  and  Blue  and  if  you  have  green  plants  mix  and  match  with  a  full  spectrum  light  as  well.
 
 For  example  you  can  use  the  OSRAM  Biolux  965  with  a  Philips  Actinic  BLTL-K  ,  or  Actinic  BL  or  a  4500K  to  5000K  Full  spectrum  Lamp  with  a  UVB  Lamp  (Ref  Full  Spectrum  Reptile  Lamps),  this  way  you  will  have  both  of  UV  Light  and  enough  of  Red  and  Blue  Light  for  the  other  green  plants..
 
 In  Metal  Hallide  one  can  use  the  Double  Ended  Ceramic  technology  Lamps  at  4200K  (942)  mix  it  with  a  Lamp  like  that  of  Giesmann  150W  DE  Marine  or  use  a  Giesemann  MEGACHROME  marine  with  a  Giesemann  MEGACHROME  tropic.  
 
 Giesemann  MEGACHROME  marine  :-  http://www.giesemann.de/73,2,,.html
 Giesemann  MEGACHROME  marine  Spectrum  :-  http://www.giesemann.de/userfiles/bilder/73-B-20060310181210.jpg
 
 Giesemann  MEGACHROME  tropic  Data  :-  http://www.giesemann.de/76,2,,.html
 Giesemann  MEGACHROME  tropic  Spectrum  :-  http://www.giesemann.de/userfiles/bilder/76-B-20060310182631.jpg
 
 Giesemann  also  has  T5  Tubes,  So  youmay  use  Giesemann  POWERCHROME  pureactinic  with  Giesemann  POWERCHROME  aquaflora.
 
 Giesemann  POWERCHROME  pureactinic  Data  :-  http://www.giesemann.de/79,2,,.html
 Giesemann  POWERCHROME  pureactinic  Spectrum  :-  http://www.giesemann.de/userfiles/bilder/79-B-20062110120409.jpg
   
 Giesemann  POWERCHROME  aquaflora  Data  :-  http://www.giesemann.de/64,2,,.html
 Giesemann  POWERCHROME  aquaflora  Spectrum  :-  ¬†http://www.giesemann.de/userfiles/bilder/64-B-20061909144734.jpg
 
 
 Giesemann  is  being  quoted  just  for  examples....
 
 In  Short  Mix  and  Match  with  a  Light  spectrum  which  has  a  small  component  of  UV-B   (  UV-B  light  is  harmful  to  humans)   for  Red  Plants  and  with  a  Lamp  which  has  a  good  balance  of  Red  and  Blue  Light...
 
 Regards
 
 Sujoy
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