Navigation Links
Blue light irradiation promotes growth, increases antioxidants in lettuce seedlings
Date:12/12/2011

ABIKO, JAPANThe quality of agricultural seedlings is important to crop growth and yield after transplantation. Good quality seedlings exhibit characteristics such as thick stems, thick leaves, dark green leaves, and large white roots. Scientists have long known that plant development and physiology are strongly influenced by the light spectrum, which affects seedling structure. Raising seedlings irradiated with blue light has been shown to increase crop yield after planting because of the high accumulation of phenolic compounds. Although most studies with blue light only or blue mixed with red light have indicated that blue light-containing irradiation produces higher plant biomass, recent research has suggested that yield and crop quality could be improved by controlling light quality.

Researchers from Japan's Central Research Institute of Electric Power Industry premiered a study in HortScience that determined the effects of raising seedlings with different light spectrasuch as with blue, red, and blue + red LED lightson seedling quality and yield of red leaf lettuce plants. Photosynthetic pigments, polyphenols, and antioxidant activity of lettuce seedlings treated with different light spectra were also determined.

The team performed experiments in which pregerminated seeds of red leaf lettuce were subjected to various light treatments using blue and red light for one week. At the end of the light treatment (17 days after sowing), the leaf area and shoot fresh weight of the lettuce seedlings treated with red light increased by 33% and 25%, respectively, and the dry weight of the shoots and roots of the lettuce seedlings treated with blue-containing LED lights increased by greater than 29% and greater than 83% compared with seedlings grown under a white fluorescent lamp. The shoot/root ratio and specific leaf area of plants irradiated with blue-containing LED lights decreased.

At 45 days after sowing (DAS), higher leaf areas and shoot fresh weight were obtained in lettuce plants treated with blue-containing LED lights. "The total chlorophyll contents in lettuce plants treated with blue-containing and red lights were less than that of lettuce plants treated with florescent light; the chlorophyll a/b ratio and carotenoid content increased under blue-containing LED lights", the researchers wrote. Polyphenol contents and the total antioxidant status were greater in lettuce seedlings treated with blue-containing LED lights than in those treated with florescent light at 17 DAS.

The scientists concluded that raising seedlings treated with blue light promoted the growth of lettuce plants after transplanting. "This is likely because of high shoot and root biomasses, a high content of photosynthetic pigments, and high antioxidant activities in the lettuce seedlings before transplanting. The compact morphology of lettuce seedlings treated with blue LED light would be also useful for transplanting", noted corresponding author Kazuhiro Shoji.


'/>"/>

Contact: Michael W. Neff
mwneff@ashs.org
703-836-4606
American Society for Horticultural Science
Source:Eurekalert  

Related medicine news :

1. Study sheds light on cancer burden in Australia
2. Shedding light on why it is so tough to make healthier hot dogs
3. Chimps Shed Light on How Humans Learned to Share
4. Research With Worms May Shed Light on Womens Fertility
5. Autistic Teens With Epilepsy Often Light-Sensitive
6. 2011 ASH Annual Meeting to highlight latest hematology research, clinical care breakthroughs
7. Mistaken identity: New report highlights the global impact of medical misdiagnosis
8. New research sheds light on how we see family resemblance in faces
9. New report highlights LGBT older adults needs, identifies policy opportunities
10. New smart material could help tap medical potential of tissue-penetrating light
11. Large-scale jaw pain study sheds light on pain disorders
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Blue light irradiation promotes growth, increases antioxidants in lettuce seedlings
(Date:9/21/2017)... ... September 21, 2017 , ... The American ... Health Services for professionals in the addiction treatment industry entitled: Special Investigations ... , Insurance companies and state and federal governments are increasingly scrutinizing the addiction ...
(Date:9/21/2017)... ... 21, 2017 , ... Hair restoration surgery is having a ... the International Society of Hair Restoration Surgery (ISHRS). The worldwide volume ... with 635,189 procedures performed in 2016. , "Like other forms of cosmetic ...
(Date:9/21/2017)... , ... September 21, 2017 , ... Bill Howe Plumbing’s ... its customers, and give back to the community. For over 37 years, they have ... successful companies serving plumbing in San Diego. They were chosen as the ...
(Date:9/21/2017)... ... September 21, 2017 , ... Innovatum ... at the Global GS1 Healthcare Conference 2017 in Chicago, IL on October 17-19, ... ensuring label quality and improving patient safety. , Microscan , a ...
(Date:9/21/2017)... ... September 21, 2017 , ... ... and highly accurate cancer screening tests, has received two prestigious recognitions that acknowledge ... survival rates. , Preora has been named a Top 100 Finalist ...
Breaking Medicine News(10 mins):
(Date:9/9/2017)... , Sept. 8, 2017 Dealmed Medical ... independent supplier of medical equipment, supplies, drugs, vaccines, and ... has entered into an agreement to acquire Vantage Medical ... based in Holtsville, New York . ... in supplying new and emerging medical practices, will operate ...
(Date:9/7/2017)... Sept. 7, 2017 NuvoAir (formerly called ... announced today a partnership with Novartis Pharma AG to distribute ... position as the leading mobile spirometry platform and Novartis, commitment ... ... ...
(Date:9/6/2017)...   PDI , a leader in infection prevention ... educational session focused on the role of chlorhexidine gluconate ... the 2017 Annual Scientific Meeting of the Association for ... the Phoenix Convention Center in ... will also feature PDI,s Prevantics® Device Swab ...
Breaking Medicine Technology: