Appraisal of combined applications of trichoderma virens and a biopolymer-based biostimulant on lettuce agronomical, physiological, and qualitative properties under variable n regimes

Leo Sabatino, Giuseppe Colla, Eugenio Cozzolino, Antonio Pannico, Maria Giordano, Nunzio Fiorentino, Nadia Lombardi, Christophe El-Nakhel, Valerio Cirillo, Edris Shabani, Mauro Napolitano, Petronia Carillo, Sheridan L. Woo, Youssef Rouphael

Risultato della ricerca: Articlepeer review

13 Citazioni (Scopus)

Abstract

The current research elucidated the agronomical, physiological, qualitative characteristics and mineral composition of lettuce (Lactuca sativa L. var. longifolia) after treatments with a beneficial fungus Trichoderma virens (TG41) alone or in combination with a vegetal biopolymer-based biostimulant (VBP; 'Quik-link'). The experiment consisted of lettuce plants grownin threeNconditions: Sub-optimal (0N kg ha-1), optimal (70N kg ha-1), and supra-optimal (140N kg ha-1) N levels. Lettuce grown under 0N fertilization showed a significant increase in fresh yield when inoculated with TG41 alone (45%) and a greater increase with TG41 + VBP biostimulant (67%). At 48 days after transplanting, both the TG41 alone or TG41+VBP biostimulant induced higher values of CO2 assimilation in comparison to the control. The mineral concentrations in leaf tissues were greater by 10% for K and 12% for Mg with the TG41+VBP treatments compared to the untreated lettuce. The lettuce plants receiving either TG41 alone or TG41+VBP biostimulants had a significantly lower nitrate content than any of the untreated controls. In non-fertilized conditions, plants treated with TG41+VBP biostimulants produced lettuce of higher premium quality as indicated by the higher antioxidant activity, total ascorbic acid (+61%-91%), total phenols (+14%) and lower nitrate content when compared to the untreated lettuce.
Lingua originaleEnglish
pagine (da-a)1-22
Numero di pagine22
RivistaAgronomy
Volume10
Stato di pubblicazionePublished - 2020

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science

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