In Space exploration, plants will play a crucial role, not only for resource regeneration, but also as food resource. Ionizing radiation represents a key constraint for plant growth and photosynthesis in space interacting with many developmental processes. At very low doses, ionizing radiation may induce some positive effects related on plant physiological and morphological traits. Among studies focused on the effect of ionizing radiation on plants, the challenge to improve conditions for plant growth in order to induce specific nutritional properties still remains. This study is aimed to analyse the effects of four doses of X rays (0, 0.3, 10 and 20 Gy) on soybean seedlings growing in a climatic chamber under three different light quality regimes: White (W), Red (R) and Red-Blue (RB) light. The aim of the study is to assess if specific light quality treatments, during plant growth may reduce and/or enhance the production, in irradiated plants, of metabolites useful in human diet. At this purpose, irradiated and control seedlings were analyzed in terms of growth (measuring stem, root elongation and fresh weight) and phytochemicals production (chlorophylls, carotenoids polyphenols and anthocyanins). Our results showed that R-light induces a significant stem elongation in control and X-ray irradiated seedlings compared to W and RB. At the highest dose of X-rays, 20 Gy, conversely to W and RB, the R seedlings maintain higher values of fresh biomass. The RB-light treatment induced higher content of chlorophylls and carotenoids than W and R treatments. The R and RB light treatments determined in irradiated seedlings a significant increase in polyphenols and a significant decrease in anthocyanins compared to W and not-irradiated samples. The overall results indicated that there is significant interaction between the two factors suggesting that it is possible to induce specific traits in irradiated plants by opportunely manipulating light quality during plant growth.

Combined effect of different X-ray doses and light quality on soybean seedlings.

Amitrano C.
;
De Micco V.;Vitale E.;Pugliese M.;Arena C.
2017

Abstract

In Space exploration, plants will play a crucial role, not only for resource regeneration, but also as food resource. Ionizing radiation represents a key constraint for plant growth and photosynthesis in space interacting with many developmental processes. At very low doses, ionizing radiation may induce some positive effects related on plant physiological and morphological traits. Among studies focused on the effect of ionizing radiation on plants, the challenge to improve conditions for plant growth in order to induce specific nutritional properties still remains. This study is aimed to analyse the effects of four doses of X rays (0, 0.3, 10 and 20 Gy) on soybean seedlings growing in a climatic chamber under three different light quality regimes: White (W), Red (R) and Red-Blue (RB) light. The aim of the study is to assess if specific light quality treatments, during plant growth may reduce and/or enhance the production, in irradiated plants, of metabolites useful in human diet. At this purpose, irradiated and control seedlings were analyzed in terms of growth (measuring stem, root elongation and fresh weight) and phytochemicals production (chlorophylls, carotenoids polyphenols and anthocyanins). Our results showed that R-light induces a significant stem elongation in control and X-ray irradiated seedlings compared to W and RB. At the highest dose of X-rays, 20 Gy, conversely to W and RB, the R seedlings maintain higher values of fresh biomass. The RB-light treatment induced higher content of chlorophylls and carotenoids than W and R treatments. The R and RB light treatments determined in irradiated seedlings a significant increase in polyphenols and a significant decrease in anthocyanins compared to W and not-irradiated samples. The overall results indicated that there is significant interaction between the two factors suggesting that it is possible to induce specific traits in irradiated plants by opportunely manipulating light quality during plant growth.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11588/752380
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact