Table 6 Overview of the effects on plant growth and adaptation to nickel stress, as well as nickel tolerance, of genera identified as biomarkers in Psychotria gabriellae (Pg, Ni-HA) and Psychotria semperflorens (Ps, nA) (non-exhaustive listing)
From: Plant nickel-exclusion versus hyperaccumulation: a microbial perspective
Species and compartment | Biomarkera | Environment | PGP effect | Ni-tolerance and effect on plant under metal stressb |
|---|---|---|---|---|
Pg (Ni-HA) leaves / Ps (nA) pulps | Diaporthe (F) | Endophytes from Noccaea caerulescens (Ni-HA population and Pb–Zn adapted population from Spain), Noccaea goesingensis (Ni-HA population from Austria and non-toxic metal-adapted population from Spain), and Odontarrhena serpyllifolia (Ni-HA from Spain) [97] Isolated from roots of Festuca rubra subsp. pruinosa (Spain) [89] | Siderophore production [89] | Ni-tolerance (3000 µM) [97] ↑ [Ni] in shoots and roots of Noccaea caerulescens (Ni-HA) (with an inoculation of native strain) [97] ↑ [Ni] in shoots and roots of Noccaea goesingensis (Ni-HA) (with an inoculation of native or foreign strain) [97] ↑ gene expression of IRT1, ITR2, and ZIP5 in Noccaea caerulescens (Ni-HA) under Ni pressure. [97] |
Pg (Ni-HA) rhizospheric soil / Ps (nA) roots | Mycena (F) | Â | Â | Ni-tolerance [98] |