TY - GEN

T1 - Rootstock-mediated variation in tomato vegetative growth under drought, salinity and soil impedance stresses

AU - Albacete, Alfonso

AU - Martinez-Andujar, Cristina

AU - Dodd, Ian Charles

AU - Giuffrida, Francesco

AU - Hichri, Imene

AU - Lutts, Stanley

AU - Thompson, A.

AU - Asins, Maria J.

PY - 2015/6/15

Y1 - 2015/6/15

N2 - There is increasing interest in using novel rootstocks to confer resistance to abiotic stresses in horticultural species, and to understand the physiological mechanism(s) conferring these responses. The same scion (Solanum lycopersicum ‘Boludo F1’, ‘Monsanto’) was grafted onto 144 different rootstocks: six accessions from S. lycopersicum (‘Cerasiforme’) and S. pimpinellifolium, selected for drought tolerance (sourced from AVRDC); nine introgression lines from S. lycopersicum × S. pennellii and × S. habrochaites, selected for high root/shoot ratio, salinity and drought tolerances (sourced from TGRC); and a population of 129 recombinant inbred lines (RILs) derived from a salt sensitive genotype of S. lycopersicum var. cerasiforme and a salt tolerant line from S. pimpinellifolium L. (sourced from IVIA). Plants were grown in greenhouses in hydroponics (salinity stress) or soil (soil drying or high soil mechanical impedance) for 2-5 weeks (during the vegetative stage), and shoot fresh weight (SFW) was recorded at the end of each experiment. Although rootstock effects on SFW were related for the soil drying and impedance assays, no relation was found between SFW under salinity and SFW under the other stresses. Indeed, the best rootstocks for drought stress were different to those that were the best for salinity and high soil impedance. For each abiotic stress, some graft combinations had higher SFW (up to 90% more) than the self-grafted commercial cultivar ‘Boludo F1’. The search for genetic factors contributing to this variation will be the objective of a future study.

AB - There is increasing interest in using novel rootstocks to confer resistance to abiotic stresses in horticultural species, and to understand the physiological mechanism(s) conferring these responses. The same scion (Solanum lycopersicum ‘Boludo F1’, ‘Monsanto’) was grafted onto 144 different rootstocks: six accessions from S. lycopersicum (‘Cerasiforme’) and S. pimpinellifolium, selected for drought tolerance (sourced from AVRDC); nine introgression lines from S. lycopersicum × S. pennellii and × S. habrochaites, selected for high root/shoot ratio, salinity and drought tolerances (sourced from TGRC); and a population of 129 recombinant inbred lines (RILs) derived from a salt sensitive genotype of S. lycopersicum var. cerasiforme and a salt tolerant line from S. pimpinellifolium L. (sourced from IVIA). Plants were grown in greenhouses in hydroponics (salinity stress) or soil (soil drying or high soil mechanical impedance) for 2-5 weeks (during the vegetative stage), and shoot fresh weight (SFW) was recorded at the end of each experiment. Although rootstock effects on SFW were related for the soil drying and impedance assays, no relation was found between SFW under salinity and SFW under the other stresses. Indeed, the best rootstocks for drought stress were different to those that were the best for salinity and high soil impedance. For each abiotic stress, some graft combinations had higher SFW (up to 90% more) than the self-grafted commercial cultivar ‘Boludo F1’. The search for genetic factors contributing to this variation will be the objective of a future study.

KW - tomato

KW - vegetative growth

KW - rootstock

KW - drought

KW - salinity

KW - soil impedance

U2 - 10.17660/ActaHortic.2015.1086.17

DO - 10.17660/ActaHortic.2015.1086.17

M3 - Conference contribution/Paper

SN - 9789462610811

T3 - ISHS Acta Horticulturae

SP - 141

EP - 146

BT - I International Symposium on Vegetable Grafting

PB - International Society for Horticultural Science

ER -