Gaismas ietekme uz bioloģiski aktīvo savienojumu uzkrāšanos dažādās tomātu šķirnēs
Date
2021
Authors
Gavare, Diāna
Journal Title
Journal ISSN
Volume Title
Publisher
Latvijas Universitāte
Abstract
Gaismas kvalitatīvais sastāvs ietekmē karotinoīdu un fenolu savienojumu biosintēzē iesaistīto gēnu regulēšanu ar fotoreceptoru starpniecību. Audzējot tomātus zem atšķirīga spektrālā sastāva gaismas avotiem, iespējams, varētu panākt atšķirīgu bioloģiski aktīvo savienojumu uzkrāšanos. Šajā maģistra darbā četru dažādu šķirņu tomātus audzēja zem trīs spektrāli atšķirīgiem gaismas avotiem – LED, indukcijas un augstspiediena nātrija lampām. Likopēna, beta-karotīna un fenolu savienojumu, kā nozīmīgu savienojumu tomātu kvalitātes un uzturvērtības nodrošināšanā, uzkrāšanos, atkarībā no izmantotā gaismas avota, tomātu augļos noteica spektrofotometriski. Iegūtie rezultāti liecina, ka gaismas kvalitatīvajam sastāvam uz darbā pētīto bioloģiski aktīvo savienojumu uzkrāšanos nav būtiska ietekme. Vienīgā šķirne, kas parādīja statistiski būtisku atšķirību ar kontroles variantu (augstspiediena nātrija apgaismojumā augušajiem tomātu augļiem) bija ‘Chocomate F1’. ‘Chocomate F1’ šķirnes augļos, kas auguši LED apgaismojuma apstākļos, bija statistiski būtiski lielāka likopēna koncentrācija, salīdzinot ar kontroli, kas, visticamāk, skaidrojams ar zilās gaismas viļņu klātbūtni LED lampā un ģenētiskiem faktoriem.
The qualitative composition of light influences the regulation of genes involved in the biosynthesis of carotenoids and phenolic compounds through photoreceptors. Growing tomatoes under light sources of different spectral composition could potentially lead to different accumulation of biologically active compounds. In this master's thesis, tomatoes of four different cultivars were grown under three spectrally different light sources - LED, induction and high-pressure sodium lamps. The accumulation of lycopene, beta-carotene and polyphenols, which are important compounds in ensuring the quality and nutritional value of tomatoes, in tomato fruits depending on the light source used, was determined spectrophotometrically. The obtained results show that the effect of qualitative composition of light on the accumulation of biologically active compounds studied in the work is not significant. The only cultivar that showed a statistically significant difference with the control variant (tomatoes grown under high-pressure sodium lamp) was ‘Chocomate F1’. ‘Chocomate F1’ fruits grown under LED lighting had statistically significantly higher lycopene concentrations compared to control, most likely due to the presence of blue light waves in the LED lamp and genetic factors.
The qualitative composition of light influences the regulation of genes involved in the biosynthesis of carotenoids and phenolic compounds through photoreceptors. Growing tomatoes under light sources of different spectral composition could potentially lead to different accumulation of biologically active compounds. In this master's thesis, tomatoes of four different cultivars were grown under three spectrally different light sources - LED, induction and high-pressure sodium lamps. The accumulation of lycopene, beta-carotene and polyphenols, which are important compounds in ensuring the quality and nutritional value of tomatoes, in tomato fruits depending on the light source used, was determined spectrophotometrically. The obtained results show that the effect of qualitative composition of light on the accumulation of biologically active compounds studied in the work is not significant. The only cultivar that showed a statistically significant difference with the control variant (tomatoes grown under high-pressure sodium lamp) was ‘Chocomate F1’. ‘Chocomate F1’ fruits grown under LED lighting had statistically significantly higher lycopene concentrations compared to control, most likely due to the presence of blue light waves in the LED lamp and genetic factors.
Description
Keywords
Bioloģija , tomāti , likopēns , beta-karotīns , fenoli , flavonoīdi