Tracking the Biostimulatory Effect of Fractions from a Commercial Plant Protein Hydrolysate in Greenhouse-Grown Lettuce

Francesco Cristofano, Christophe El-Nakhel, Giuseppe Colla, Mariateresa Cardarelli, Youry Pii, Luigi Lucini, Youssef Rouphael

Risultato della ricerca: Contributo in rivistaArticolo in rivista

Abstract

Protein hydrolysate biostimulants are environmentally friendly options for the reduction of nitrogen input, but their plant growth-promoting mechanisms are still not completely unveiled. Here, to put the “signaling peptide theory” to the test, a greenhouse experiment was undertaken using low (1 mM) and optimal (8 mM) NO3-treated butterhead lettuce and three molecular fractions (PH1 (>10 kDa), PH2 (1–10 kDa) and PH3 (<10 kDa) fractions), in addition to the whole product Vegamin®: PH, in a randomized block design. PH1 and PH3 significantly increased fresh yield (+8%) under optimal (lighter leaves), but not under low (darker leaves) NO3 conditions. Total ascorbic acid, lutein and β-carotene increased with PH3, and disinapoylgentobiose and kaempferol-3-hydroxyferuloyl-sophorosie-7-glucoside content increased with PH (whole/fractions) treatments, particularly under low NO3 conditions. The complete hydrolysate and analyzed peptide fractions have differential biostimulatory effects, enhancing the growth and nutritional quality of lettuce.
Lingua originaleEnglish
pagine (da-a)N/A-N/A
RivistaAntioxidants
Volume12
DOI
Stato di pubblicazionePubblicato - 2023

Keywords

  • Orbitrap LC-MS/MS
  • UHPLC
  • ascorbic acid
  • chlorogenic acid
  • fresh weight
  • low nitrogen
  • peptides
  • polyphenolics
  • produce quality
  • secondary metabolism

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