PDF Publication Title:
Text from PDF Page: 006
Plants 2019, 8, 93 6 of 12 3.1.3. Shoot Fresh and Dry Mass It is clearly shown that plant shoots’ fresh and dry mass increased with the increase of the B light in the R light combination (Table 1). The fresh and dry mass accumulation of lettuce, spinach, and basil increased with the increase of B light till 9% with the R light. The 91% R + 9% B treatment showed significantly increased fresh and dry mass in lettuce, spinach, and basil in comparison with the 100% R LEDs treatment. Whereas, the fresh and dry mass accumulation in kale and pepper increased with the increase of B light up to 5% then decreased, and a significantly higher accumulation was observed under the 95% R + 5% B light treatment in comparison with the 100% R LEDs treatment. The fresh mass in lettuce, spinach, and basil was 1.2, 1.4, and 1.4 times higher and the dry mass was 1.7, 1.4, and 1.4 times higher for plants cultured under the 91% R with 9% B treatment, respectively, compared to the 100% R treatment. The accumulation of fresh mass in kale and sweet pepper was 2.2 and 1.5 times higher whereas the dry mass was 1.5 and 1.9 times higher for plants cultured under the 95% R with 5% B treatment, respectively, compared to the treatment 100% R treatment. A previous study showed that pepper plants grown under 100% R light had a lower plant dry mass compared to plants grown under 99% R with 1% B light [32]. The present study showed decreased fresh and dry mass accumulation for all plants grown under 100% R light in comparison with the R and B light combination. Similarly, chili pepper plants cultured under 100% R light showed significantly lower fresh and dry mass compared to plants grown under RB light [17]. In contrast, tomato, salvia, and petunia had greater shoot fresh mass when grown under 100% R light than under 25% B with 75% R light [37]. Similarly, leaf lettuce showed higher fresh and dry mass accumulation under 100% R light compared to the R with the B light combination [15]. Similarly, cucumber plants cultured under 100% R light had greater shoot fresh mass and dry mass in comparison with the mixture of R and B light [36]. This may indicate that R and B light effects on plant biomass could depend on the species. 3.1.4. Flower and Fruit of the Pepper Plant Different percentages of R and B LEDs showed a significant impact on the flower and fruit number of the pepper plant (Figures 2 and 3). The flower and fruit numbers of pepper plants were higher under the combinations of different RB light ratios compared to 100% R light. The significantly higher number of flowers and fruits in the pepper plant were observed under the 95% R with 5% B treatment among the different RB light ratios. The fruit number per plant was 4.6 times higher under the 95% R + 5% B treatment whereas the fruit number was 1.3 and 2.7 times higher under the 83% R + 17% B treatment and 91% R + 9% B treatment, respectively. Plants 2019, 8, x FOR PEER REVIEW 7 of 13 40 30 20 10 0 bc 83 % R + 17 % B b 91 % R + 9 % B a 95 % R + 5 % B c 100 % R Figure 2. The effect of different percentages of red (R) and blue (B) LEDs on the initiation of the Figure 2. The effect of different percentages of red (R) and blue (B) LEDs on the initiation of the flowering of the sweet pepper. Bars represent the standard deviation (n = 6). Values with different flowering of the sweet pepper. Bars represent the standard deviation (n = 6). Values with different letters are significantly different from each other (p < 0.05). letters are significantly different from each other (p < 0.05). Our study showed that significantly higher flower and fruit numbers were observed under combinations of RB light in comparison with 100% R light. A previous study showed that pepper plants grown under a combination of R with B LEDs showed greater total yields and fruit numbers in comparison with 100% R light [17]. The higher growth and fresh mass of the pepper plants indicates the plants’ good health and fruiting potentiality, thus increasing the number of flowers and Flower number/ plant fruits of the plants. This may be the result of the maximum photosynthetic efficiency of plants grownPDF Image | Blue Light added with Red LEDs Enhance Growth Characteristics
PDF Search Title:
Blue Light added with Red LEDs Enhance Growth CharacteristicsOriginal File Name Searched:
plants-08-00093.pdfDIY PDF Search: Google It | Yahoo | Bing
Cruise Ship Reviews | Luxury Resort | Jet | Yacht | and Travel Tech More Info
Cruising Review Topics and Articles More Info
Software based on Filemaker for the travel industry More Info
The Burgenstock Resort: Reviews on CruisingReview website... More Info
Resort Reviews: World Class resorts... More Info
The Riffelalp Resort: Reviews on CruisingReview website... More Info
CONTACT TEL: 608-238-6001 Email: greg@cruisingreview.com (Standard Web Page)