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Sequential light programs shape kale (Brassica napus) sprout appearance and alter metabolic and nutrient content.

Carvalho SD, Folta KM - Hortic Res (2014)

Bottom Line: Different light wavelengths have specific effects on plant growth and development.Sequential treatments of darkness, blue light, red light and far-red light were applied throughout sprout development to alter final product quality.These results indicate that sequential treatment with narrow-bandwidth light may be used to affect key economically important traits in high-value crops.

View Article: PubMed Central - PubMed

Affiliation: Horticultural Sciences Department, University of Florida , Gainesville, FL, USA ; Plant Molecular and Cellular Biology Program, University of Florida , Gainesville, FL, USA.

ABSTRACT
Different light wavelengths have specific effects on plant growth and development. Narrow-bandwidth light-emitting diode (LED) lighting may be used to directionally manipulate size, color and metabolites in high-value fruits and vegetables. In this report, Red Russian kale (Brassica napus) seedlings were grown under specific light conditions and analyzed for photomorphogenic responses, pigment accumulation and nutraceutical content. The results showed that this genotype responds predictably to darkness, blue and red light, with suppression of hypocotyl elongation, development of pigments and changes in specific metabolites. However, these seedlings were relatively hypersensitive to far-red light, leading to uncharacteristically short hypocotyls and high pigment accumulation, even after growth under very low fluence rates (<1 μmol m(-2) s(-1)). General antioxidant levels and aliphatic glucosinolates are elevated by far-red light treatments. Sequential treatments of darkness, blue light, red light and far-red light were applied throughout sprout development to alter final product quality. These results indicate that sequential treatment with narrow-bandwidth light may be used to affect key economically important traits in high-value crops.

No MeSH data available.


Related in: MedlinePlus

Effect of simultaneous red, far-red and blue light irradiance on the growth of Red Russian kale seedlings. (a) Anthocyanin and (b) chlorophyll levels of 4-day-old seedlings grown in darkness for 1 day and then 3 days under to the indicated red, far-red and blue light conditions. Results represent the average of three independent experiments. Means±s.e. s.e., standard error.
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fig6: Effect of simultaneous red, far-red and blue light irradiance on the growth of Red Russian kale seedlings. (a) Anthocyanin and (b) chlorophyll levels of 4-day-old seedlings grown in darkness for 1 day and then 3 days under to the indicated red, far-red and blue light conditions. Results represent the average of three independent experiments. Means±s.e. s.e., standard error.

Mentions: Blue light typically induces anthocyanin accumulation. To test the effect of blue supplementation on mixtures of red and far-red light, seedlings were grown as in Figure 5, except that blue light was added. Consistent with the effect of combinations of red and far-red light on hypocotyl elongation (Figure 5a), the presence of blue light did not augment the strong hypocotyl growth inhibition under high fluence rates (data not shown). The addition of blue light along with red and/or far-red light promoted increased levels of anthocyanins (Figure 6a). Increasing fluence rates of blue light on a red background led to higher levels of anthocyanins. When blue light was applied together with far-red light anthocyanin accumulation was 30% higher than when far-red light was provided alone (Figures 6a and 3b). The presence of high fluence rates of blue light under a red background was sufficient to induce a 50% increase in chlorophyll content when compared to the seedlings grown under red light (25 μmol m−2 s−1) alone, promoting the highest levels of chlorophyll accumulation measured in this study (Figures 4b and 6b).


Sequential light programs shape kale (Brassica napus) sprout appearance and alter metabolic and nutrient content.

Carvalho SD, Folta KM - Hortic Res (2014)

Effect of simultaneous red, far-red and blue light irradiance on the growth of Red Russian kale seedlings. (a) Anthocyanin and (b) chlorophyll levels of 4-day-old seedlings grown in darkness for 1 day and then 3 days under to the indicated red, far-red and blue light conditions. Results represent the average of three independent experiments. Means±s.e. s.e., standard error.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4591675&req=5

fig6: Effect of simultaneous red, far-red and blue light irradiance on the growth of Red Russian kale seedlings. (a) Anthocyanin and (b) chlorophyll levels of 4-day-old seedlings grown in darkness for 1 day and then 3 days under to the indicated red, far-red and blue light conditions. Results represent the average of three independent experiments. Means±s.e. s.e., standard error.
Mentions: Blue light typically induces anthocyanin accumulation. To test the effect of blue supplementation on mixtures of red and far-red light, seedlings were grown as in Figure 5, except that blue light was added. Consistent with the effect of combinations of red and far-red light on hypocotyl elongation (Figure 5a), the presence of blue light did not augment the strong hypocotyl growth inhibition under high fluence rates (data not shown). The addition of blue light along with red and/or far-red light promoted increased levels of anthocyanins (Figure 6a). Increasing fluence rates of blue light on a red background led to higher levels of anthocyanins. When blue light was applied together with far-red light anthocyanin accumulation was 30% higher than when far-red light was provided alone (Figures 6a and 3b). The presence of high fluence rates of blue light under a red background was sufficient to induce a 50% increase in chlorophyll content when compared to the seedlings grown under red light (25 μmol m−2 s−1) alone, promoting the highest levels of chlorophyll accumulation measured in this study (Figures 4b and 6b).

Bottom Line: Different light wavelengths have specific effects on plant growth and development.Sequential treatments of darkness, blue light, red light and far-red light were applied throughout sprout development to alter final product quality.These results indicate that sequential treatment with narrow-bandwidth light may be used to affect key economically important traits in high-value crops.

View Article: PubMed Central - PubMed

Affiliation: Horticultural Sciences Department, University of Florida , Gainesville, FL, USA ; Plant Molecular and Cellular Biology Program, University of Florida , Gainesville, FL, USA.

ABSTRACT
Different light wavelengths have specific effects on plant growth and development. Narrow-bandwidth light-emitting diode (LED) lighting may be used to directionally manipulate size, color and metabolites in high-value fruits and vegetables. In this report, Red Russian kale (Brassica napus) seedlings were grown under specific light conditions and analyzed for photomorphogenic responses, pigment accumulation and nutraceutical content. The results showed that this genotype responds predictably to darkness, blue and red light, with suppression of hypocotyl elongation, development of pigments and changes in specific metabolites. However, these seedlings were relatively hypersensitive to far-red light, leading to uncharacteristically short hypocotyls and high pigment accumulation, even after growth under very low fluence rates (<1 μmol m(-2) s(-1)). General antioxidant levels and aliphatic glucosinolates are elevated by far-red light treatments. Sequential treatments of darkness, blue light, red light and far-red light were applied throughout sprout development to alter final product quality. These results indicate that sequential treatment with narrow-bandwidth light may be used to affect key economically important traits in high-value crops.

No MeSH data available.


Related in: MedlinePlus