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Publication Type J
Authors Morales, M. A., E. Olmos, A. Torrecillas, M. J. Sanchez-Blanco and J. J. Alarcon
Title Differences in water relations, leaf ion accumulation and excretion rates between cultivated and wild species of Limonium sp. grown in conditions of saline stress
Source Flora
Author Keywords excretion; halophyte; Limonium pectinatum; Limonium caspium x Limonium latifolium cv. Beltlaard; osmotic adjustment; salt gland; salt tolerance LYCOPERSICON-ESCULENTUM; OSMOTIC ADJUSTMENT; L-PENNELLII; SALT; TOMATO; LEAVES; HALOPHYTES; TOLERANCE; SOLUTES; DROUGHT
Abstract Plants of two genotypes, Limonium pectinatum (wild species) and the hybrid Limonium latifolium x Limonium caspium cv. Beltlaard grown in greenhouse conditions were irrigated with a 200 mM NaCl solution for 4 months (saline treatment). The dry weight of cv. Beltlaard plants was significantly reduced by salinity but remained unchanged in Limonium pectinatum. At the end of the experiment none of the parameters related to floral stems (number, height and dry weight) in Limonium pectinatum was affected to any significant degree by salts, while the treated plants of the Beltlaard genotype showed significant reductions in these parameters compared with the control plants. Leaf water relations under saline conditions showed a similar behaviour in both genotypes, achieving the same degree of leaf osmotic adjustment through the accumulation of Na+ and Cl-. Although the highest levels of these ions were found in treated plants of Limonium pectinatum, the lower accumulation of salts in the tissues of cv. Beltlaard plants generated major toxicity and nutritional disturbances, which negatively affected growth. The Na+ and Cl- excretion rate through salt glands was higher in Limonium pectinatum than in cv. Beltlaard, which indicated that the wild species was more efficient decreasing the toxic salt content of its tissues. The ultrastructure of these salt glands is depicted and described.
Author Address Centro Edafol & Biol Apl Segura, CSIC, Dpto Riego & Salinidad, POB 4195, E-30080 Murcia, Spain Centro Edafol & Biol Apl Segura, CSIC, Dpto Riego & Salinidad, E-30080 Murcia, Spain Sanchez-Blanco MJ Centro Edafol & Biol Apl Segura, CSIC, Dpto Riego & Salinidad, POB 4195, E-30080 Murcia, Spain
29-Character Source Abbreviation Flora
Year Published 2001
Volume 196
Issue 5
Beginning Page 345-352
Unique Article Identifier ISI:000171591300002
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