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Impact of CO2 on quality of baby lettuce grown under optimized light spectrum

100%

Sirtautas R., Samuoliene G., Brazaityte A., Sakalauskaite J., Sakalauskiene S., Virsile A., Jankauskiene J., Vastakaite V., Duchovskis P.

Acta Scientiarum Polonorum. Hortorum Cultus

2014

tom 13

nr 2

The cost and yield are two the most important criteria in agriculture by which optimization of environmental factors are needed to carry out. In the present study, we investigated the efficient lighting spectrum and elevated CO2 concentration for cultivating healthier plants more rapidly. One of the aims of our study is to optimize LEDs light spectrum for healthier vegetable production in greenhouses and maximum economical benefits for growers. The impact of elevated carbon dioxide (CO2) concentration on antioxidant and nutritional properties of green leaf ‘Multigreen 3’ and red leaf ‘Multired 4’ baby leaf lettuce (Lactuca sativa L.), grown under optimized light spectrum was investigated. CO2 concentrations of 0.963 g · dm-3and 1.938 g · dm-3 were maintained in the growth chambers. Lettuce was grown under four wavelength (640, 455, 660 and 735 nm) light-emitting diode based (LED) illumination. Under 0.963 g · dm-3 CO2 conditions, ‘Multired 4’ lettuce represented higher antioxidant value due to higher ascorbic acid, anthocyanin, tocopherol contents and higher sucrose concentration, as compared to ‘Multigreen 3’ lettuce. Higher CO2 concentration (1.938 g · dm-3) had uneven effect on the quality of both baby leaf lettuce cultivars. Red leaf lettuce reacted to the higher CO2 level by lowered D tocopherol, ascorbic acid concentrations and significantly higher glucose contents in their leaves, when green leaf lettuce – contrarily – contained higher ascorbic acid and D tocopherol concentrations under 1.938 g · dm-3 of CO2.

The effect of elevated CO2 concentrations on leaf carbohydrate, chlorophyll contents and photosynthesis in radish

100%

Urbonaviciute A., Samuoliene G., Sakalauskaite J., Duchovskis P., Brazaityte A., Siksnianiene J. B., Ulinskaite R., Sabajeviene G., Baranauskis K.

Polish Journal of Environmental Studies

2006

tom 15

nr 6

The objective of this study was to evaluate the effect of different CO2 concentrations on carbohydrate, chlorophyll contents and net photosynthetic productivity in radish (Raphanus sativus L., cv. Zara) leaves. Plants were exposed to 350, 700, 1,500 and 3,000 ppm atmospheric CO2 concentrations over ten days. Day/ night temperature was 24°C/17°C and photoperiod was 16 h. Carbohydrate (fructose, glucose, sucrose and maltose) content analysis was performed using chromatographic methods. The content of chlorophyll was evaluated spectrophotometrically. The results showed that elevated CO2 increases total carbohydrate content and changes in hexoses/sucrose ratio. A significant increase in chlorophyll content was only in 1,500 ppm treatment. Differences in photosynthetic productivity rate were within error margins. There was no effect on carbohydrate and chlorophyll contents in radish leaves seven days after returning plants to ambient CO2, though higher photosynthetic productivity rate was in radish, previously grown under 700 ppm CO2. In summary, leaf carbohydrate contents affect the intensity of photosynthetic pigment synthesis.

Ograniczanie wyników

1 Acta Scientiarum Polonorum. Hortorum Cultus

1 Polish Journal of Environmental Studies

2 Brazaityte A.

2 Duchovskis P.

2 Sakalauskaite J.

2 Samuoliene G.

1 Baranauskis K.

1 Jankauskiene J.

1 Sabajeviene G.

1 Sakalauskiene S.

1 Siksnianiene J. B.

1 Sirtautas R.

1 Ulinskaite R.

1 Urbonaviciute A.

1 Vastakaite V.

1 Virsile A.

1 2014

1 2006

Wyniki wyszukiwania

Impact of CO2 on quality of baby lettuce grown under optimized light spectrum

The effect of elevated CO2 concentrations on leaf carbohydrate, chlorophyll contents and photosynthesis in radish