RT article
T1 Physiological characterization of a pepper hybrid rootstock designed to cope with salinity stress
A1 López-Serrano, Lidia
A1 Canet-Sanchis, Guillermo
A1 Vuletin Selak, Gabriela
A1 Penella, Consuelo
A1 San Bautista, Alberto
A1 López-Galarza, Salvador
A1 Calatayud, Ángeles
K1 H2O2
K1 A  Agriculture
K1 F62  Plant physiology - Growth and development
K1 F60  Plant physiology and biochemistry
K1 Horticulture
K1 Plant physiology
K1 Grafting
K1 Salt stress
K1 Pepper
K1 Salt tolerance
K1 Antioxidants
K1 Photosynthesis
K1 Rootstocks
AB In pepper crops, rootstocks that tolerate salt stress are not used because available commercial rootstocks offer limited profits. In this context, we obtained the hybrid NIBER®, a new salinity-tolerant rootstock that has been tested under real salinity field conditions for 3 years with 32%–80% higher yields than ungrafted pepper plants. This study aimed to set up the initial mechanisms involved in the salinity tolerance of grafted pepper plants using NIBER® as a rootstock to study root-shoot behavior, a basic requirement to develop efficient rootstocks. Gas exchange, Na+/K+, antioxidant capacity, nitrate reductase activity, ABA, proline, H2O2, phenols, MDA concentration and biomass were measured in ungrafted plants of cultivar Adige (A), self-grafted (A/A), grafted onto NIBER® (A/N) and reciprocal grafted plants (N/A), all exposed to 0 mM and 70 mM NaCl over a 10-day period. Salinity significantly and quickly decreased photosynthesis, stomatal conductance and nitrate reductase activity, but to lower extent in A/N plants compared to A, A/A and N/A. A/N plants showed decreases in the Na+/K+ ratio, ABA content and lipid peroxidation activity. This oxidative damage alleviation in A/N was probably due to an enhanced H2O2 level that activates antioxidant capacity to cope salinity stress, and acts as a signal molecule rather than a damaging one by contributing a major increase in phenols and, to a lesser extent, in proline concentration. These traits led to a minor impact on biomass in A/N plants under salinity conditions. Only the plants with the NIBER® rootstock controlled the scion by modulating responses to salinity.
PB Elsevier
SN 0981-9428
YR 2020
FD 2020
LK http://hdl.handle.net/20.500.11939/6292
UL http://hdl.handle.net/20.500.11939/6292
LA en
NO López-Serrano, L., Canet-Sanchis, G., Selak, G. V., Penella, C., San Bautista, A., López-Galarza, S., & Calatayud, Á. (2020). Physiological characterization of a pepper hybrid rootstock designed to cope with salinity stress. Plant Physiology and Biochemistry, 148, 207-219
DS MINDS@UW
RD Dec 2, 2023