Screening of ‘King’ mandarin (Citrus nobilis Lour) × Poncirus trifoliata ((L.) Raf.) hybrids as salt stress-tolerant citrus rootstocks

This work evaluates new citrus hybrid tolerance to salt stress compared to Carrizo citrange. Growth parameters, ion concentration, photosynthetic parameters, leaf water relation, plant damage and proline concentration were assessed in plants irrigated with 0 (control) or 60 mM of NaCl for 60 days. S...

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Published in:Horticulture, environment and biotechnology 2021, Environment, and Biotechnology, 62(3), , pp.337-352
Main Authors: Martínez-Cuenca, Mary-Rus, Primo-Capella, Amparo, Forner-Giner, Maria Angeles
Format: Article
Language:English
Subjects:
Abiotic stress
Abscission
Accumulation
Agriculture
Biomass burning
Biomedical and Life Sciences
Carbon dioxide
Citrus nobilis
Conductance
Genotypes
Hybrids
Ion concentration
Leaves
Life Sciences
Mandarins
Organs
Parameters
Photosynthesis
Plant biomass
Plant Breeding/Biotechnology
Plant Ecology
Plant Physiology
Plants
Poncirus trifoliata
Proline
Research Report
Resistance
Rootstocks
Salinity tolerance
Salt tolerance
Sodium chloride
Stomata
Stomatal conductance
Stress
Water damage
Water potential
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Summary:This work evaluates new citrus hybrid tolerance to salt stress compared to Carrizo citrange. Growth parameters, ion concentration, photosynthetic parameters, leaf water relation, plant damage and proline concentration were assessed in plants irrigated with 0 (control) or 60 mM of NaCl for 60 days. Some hybrids presented marked salt-stress symptomatology like sharp decreases in plant biomass and RGR parameter, and high leaf burn and abscission percentages. While Cl − accumulation in most salinised genotypes was recorded in all the plant fractions, accumulation occurred in some hybrids only in their aerial organs. Stomatal conductance also lowered under salt conditions in all the hybrids, whereas the internal CO 2 concentration (Ci) tended to increase. Salt stress lowered the leaf water potentials in all the 0501 hybrids. As a response, the salinised plants induced proline accumulation. The main trait that improved salt tolerance in some genotypes is apparently linked with the imbalance among Cl − , Na + and K + ions, especially enhanced K + uptake and transport rates which delay plant damage.
ISSN:2211-3452
2211-3460
DOI:10.1007/s13580-020-00291-1