Red Blue

What happens to bean plants grown under red, blue, and green light?

If you have five lima bean plants, one grown under natural light, one under red light, one under blue light, and one under green light, how would each plant grow? And which color of light is most effective for bean plant growth: red, blue, or green light?

Plants need the full spectrum to grow well. With any limit in the spectrum they will suffer a drop in growth rate as all parts of the visible range can contribute to plant growth but if light is limited they will struggle.

Plants respond most to light in two peak ranges for photosynthesis. The first peak is in the blue range (430 to 450nm) and the second peak, is in the red range (680 to 700nm) but they respond across the spectrum even in ranges beyond the visible. In between these two peaks, in the green spectra, the absorbance rate dips.

Photosynthesis and growth regulation spans 300-800nm. Plants use light and changing light duration to keep themselves regulated to the changing seasons.
Graph of light wavelength and a plant’s relative growth.

http://www.clovis.co.uk/horticultural/images/graph_lwpg.jpg

http://www.clovis.co.uk/horticultural/polythene_film_facts.htm

http://www.sankey.ws/plantlumen.html

Chlorophyll absorption spectra

http://www.botany.uwc.ac.za/ecotree/photosynthesis/spectrum.htm

http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/A/ActionSpectrum.html

Wavelength and Multi-Pigment Absorption image

http://www.estrellamountain.edu/faculty/farabee/biobk/pigment.gif

http://www.uic.edu/classes/bios/bios100/lecturesf04am/lect10.htm

Vegetation or foliage plants grow best under bulbs emitting blue spectrum light. Blue is 400-475nm because chlorophyll peaks at 430 – 470nm plants use this part of the spectra.

Flowering plants require light from a red-orange emitting grow light. Red visible spectra is 580-700nm but plants also need the near infrared (~730nm) to regulate them to flower & fruit properly.

Green light is reflected so is not critical for growth.

http://www.gardeners.com/Gardening-Under-Lights/5080,default,pg.html

B DOUBLE E – Red and Blue KU (Official Music Video)

Wilton 570-1121 Easy Flex 3-Piece Silicone Spatula Set, Blue $5.91 Silicone Baking Accessories. Silicone is the Wonder Kitchen Tool: it can be used in the oven (up to 500F/260C), toaster over, microwave, refrigerator and freezer and it is virtually unbreakable. These silicone utensils are the perfect tool cold foods: Jell-O, ice sculptures, Candies and hot foods: cake, muffins, bread, pies, main and side dishes and so much more! The flexibility makes removing foo…

Tovolo King Cube Ice Trays Perfect for entertaining, these new King Cube Ice Cube Trays by Tovolo feature a food-grade silicone body that is flexible, allowing the cubes to pop out effortlessly after freezing. The generous 2-inch size of each cube encourages creativity in ice cube building. Great Idea: Fill with your favorite mixer or juice, and add a bit of fruit. Imagine a nice DOF glass with a beautiful jumbo cube filled…

Pyrex 6022369 Storage 14-Piece Round Set, Clear with Blue Lids $19.99 Pyrex 14-pc Storage Set ***OPEN BOX***   This NEW product you are browsing has been inspected by our certified technicians to ensure that it meets factory specifications; it is guaranteed to be in perfect working order.The Equipment is sold in AS IS condition and returns will not be accepted so please contact us with any questions BEFORE placing an order at 1-800-572-3224 Ext: 243. We ac…

Roger Waters – The Wall (Live in Berlin) $9.39 The Wall (Live in Berlin) seemed uninspired and gimmicky in 1990 but looks and sounds terrifically compelling on DVD, thanks to its vivid image quality and greatly improved audio mixes. The freshly mineswept Potsdamer platz–a once-thriving plaza destroyed by Allied bombing in 1943–proved the perfect place to mark the opening of the Berlin Wall with an all-star production of Pink Floyd’s magnum o…

Red River Blue $10.00 Reigning CMA Male Vocalist of the Year, Blake Shelton will release his ninth album entitled, Red River Blue on July 12. Produced by multi-award winner, Scott Hendricks the forthcoming album includes Shelton’s fastest rising single-to-date, “Honey Bee.” Less than seven weeks since its debut, the up-beat, feel-good summer tune is already in the Top 10 on the Billboard and Mediabase charts. During it…

The Very Best of Neil Diamond $7.75 All products are BRAND NEW and factory sealed. Fast shipping and 100% Satisfaction Guaranteed….

Syma S107/S107G R/C Helicopter – Blue $18.94 Syma S107G is equipped with a 4-in-1 infra-red receiver (Gyro, ESC, Mixer, Receiver). This palm size S107 Toy Helicopter (18.5cm long) comes with Aluminum Frame and a Great detail canopy, it doesn’t look like a toy, but a very serious Helicopter. It is able to move in 3 Direction base on the 3 Channels, anyone can hover it easily. Since it is made with Aluminum Frame, very light weight and almost …

Baby Spring Float Sun Canopy, Colors May Vary $16.79 An adorable accessory for the Baby Spring Float. Three-position adjustable, removable canopy protects baby from the sun and folds for storage just like the Baby Spring Float.Includes a carry/storage bag. 34″L x 30″W x 3″H. 1.64 lbs. Ages 9 to 24 months….

Syma S107/S107G R/C Helicopter – Yellow $16.99 The brand new GYRO S107 3.5CH Mini RTF RC Helicopter comes with the greatest advancement in Helicopter Technology, a Gyro. No more crashing, no more replacing parts, the GYRO has changed the Helicopter industry completely, making this RC Helicopter super easy to fly and maneuver. Great for people of all skill levels, this bad boy features a coaxial rotor a single rear rotor for precise movement an…

Streamlight 73001 Nano Light Miniature Keychain LED Flashlight, Black $3.75 FEATURES Easily attaches to just about anything with pocket clip or key ring: 1 Up to 8 hours run time: 2 Machined aircraft grade aluminum with anodized finish: 3 Uses 4 alkaline button cell batteries included: 4 White LED bulb with 10 lumens: 5 Weatherproof: 6 Includes a non-rotating snap hook for easy one handed operation when atta…