Lettuce (Lactuca sativa L.) var. 'Lollo rossa' was grown in a floating hydroponic system. Six saline treatments were used, adding different concentrations of calcium chloride (CaCl2) to the nutrient solution (mol m-3): 0, 2.5, 5, 10, 15, 20, which, respectively, corresponds to an electrical conductivity of 2.5, 3, 3.5, 4.4, 5.4, 6.3 dS m-1. In plants subjected to moderate salinity stress the growth was not affected and yields were not statistically significant; however, the data shows a slight decline in 20 mol m-3 CaCl2 treatments. Nitrate contents in the leaf decreased when the concentration of CaCl2 in nutrient solutions increased. Other quality parameters were positively affected by treatment with CaCl2, especially at moderate concentrations such as 5 and 10 mol m-3. In fact, both the content of phenols and antioxidant power increased at moderate salt concentrations and reduced in the treatment with 20 mol m-3 CaCl2. The content of chlorophyll and carotenoids were not affected by treatment even at high salt concentrations. The use of CaCl2 did not result in nutrition imbalances in plants either. In fact, the ratio K/Na remained unchanged in the various treatments, as well as the contents of microelements. © 2013 Copyright Taylor and Francis Group, LLC.

Effects of calcium and salinity stress on quality of lettuce (Lactuca sativa L.) in soilless culture

CARMASSI, GIULIA;VERNIERI, PAOLO;MALORGIO, FERNANDO
2013-01-01

Abstract

Lettuce (Lactuca sativa L.) var. 'Lollo rossa' was grown in a floating hydroponic system. Six saline treatments were used, adding different concentrations of calcium chloride (CaCl2) to the nutrient solution (mol m-3): 0, 2.5, 5, 10, 15, 20, which, respectively, corresponds to an electrical conductivity of 2.5, 3, 3.5, 4.4, 5.4, 6.3 dS m-1. In plants subjected to moderate salinity stress the growth was not affected and yields were not statistically significant; however, the data shows a slight decline in 20 mol m-3 CaCl2 treatments. Nitrate contents in the leaf decreased when the concentration of CaCl2 in nutrient solutions increased. Other quality parameters were positively affected by treatment with CaCl2, especially at moderate concentrations such as 5 and 10 mol m-3. In fact, both the content of phenols and antioxidant power increased at moderate salt concentrations and reduced in the treatment with 20 mol m-3 CaCl2. The content of chlorophyll and carotenoids were not affected by treatment even at high salt concentrations. The use of CaCl2 did not result in nutrition imbalances in plants either. In fact, the ratio K/Na remained unchanged in the various treatments, as well as the contents of microelements. © 2013 Copyright Taylor and Francis Group, LLC.
2013
Borghesi, E.; Carmassi, Giulia; Uguccioni, M. C.; Vernieri, Paolo; Malorgio, Fernando
File in questo prodotto:
File Dimensione Formato  
2013 Borghesi et al JPN.pdf

non disponibili

Tipologia: Versione finale editoriale
Licenza: NON PUBBLICO - accesso privato/ristretto
Dimensione 262.82 kB
Formato Adobe PDF
262.82 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

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: https://hdl.handle.net/11568/191319
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 26
  • ???jsp.display-item.citation.isi??? 17
social impact