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:12/8/2016)... ... 2016 , ... ZyDoc , a New York-based medical ... Capture Methods for Input to Electronic Health Records: A Comparative Usability Study” has ... usability study demonstrate that a dictation-based method (“NLP Entry”) using ZyDoc’s MediSapien™ natural ...
(Date:12/8/2016)... ... 08, 2016 , ... David J. Dykeman , Ginger Pigott , ... will speak at DeviceTalks West, Dec. 12, 2016, at the Fairmont Newport Beach in ... the firm’s global Life Sciences & Medical Technology Group have been featured speakers at ...
(Date:12/8/2016)... ... 08, 2016 , ... STATEN ISLAND, N.Y., Nov. 24, 2016 ... the highest standards of trauma, maternity, cancer and chronic obstructive pulmonary disease (COPD) ... Dr. Daniel Messina. , Among the recognitions, the American College of Surgeons' (ACS) ...
(Date:12/8/2016)... California (PRWEB) , ... December 08, 2016 , ... ... has raised an $18M Series B led by Canvas Ventures . Other investors ... capital to scale its mobile platform to serve more consumers who are managing ...
(Date:12/8/2016)... ... December 08, 2016 , ... Coppin Insurance Agency, an insurance and financial ... around the Cape Coral area, is embarking on a charity drive with the goal ... , The Harry Chapin Food Bank of Southwest Florida works to provide fresh and ...
Breaking Medicine News(10 mins):
(Date:12/8/2016)... 2016  Hanson Research, an innovative leader in ... diffusion testing instruments for the pharmaceutical industry, announced ... Inc. ("Teledyne"). The move is designed to deepen ... instruments, as well as expand resources for further ... and services. Logo - http://photos.prnewswire.com/prnh/20161208/446988LOGO ...
(Date:12/8/2016)... FRANCISCO , Dec. 8, 2016 ... today announced that it has closed a $23 ... McKesson Ventures and OrbiMed. The company seeks to ... time physicians spend on mandated EHR documentation. The ... scribe service that frees doctors from 3 hours ...
(Date:12/8/2016)... LITTLE FALLS, N.J., Dec. 8, 2016 CANTEL MEDICAL ... net income of $18,800,000, or $0.45 per diluted share, on ... the first quarter ended October 31, 2016. This compares with ... sales of $153,779,000 for the first quarter ended October 31, ... the first quarter ended October 31, 2016 to $21,323,000, or ...
Breaking Medicine Technology: