Effects of Salinity on the Extensibility and Ca Availability in the Expanding Region of Growing Barley Leaves

Jonathan Paul Lynch, G. Thiel, A. Läuchli

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The growth of barley (Hordeum vulgare L.) leaves is reduced by salinity. We used the Instron extensometric technique to measure the reversible and irreversible compliance of the expanding regions of growing barley leaves from plants exposed to 1, 40, 80 and 120 mM NaCl in nutrient solution. Two barley cultivars differing in salinity resistance (cv ‘Arivat’ and cv ‘Briggs’) were compared over 5d of leaf growth. During the period of most active leaf expansion, salinity reduced reversible compliance and increased compliance in the leaf segments, although responses to salinity were complex and changed over the course of leaf expansion. Salinity increased irreversible compliance more in the salt‐sensitive cultivar Arivat than in the more salt‐tolerant cultivar Briggs. Elemental analysis of the basal leaf segments used for extensometry revealed an accumulation of Na and a depletion of Ca in segments from salinized plants, resulting in very high Na: Ca ratios in salinized expanding tissue. The concentrations of K and Mg in basal leaf tissue were elevated by salinity. Our data do support the hypothesis that the inhibition of leaf expansion by salinity stress is mediated by a decline in irreversible extensibility. We suggest that reduced Ca availability in expanding leaf tissue may contribute to growth reduction in salt‐stressed barley seedlings. 1988 Deutsche Botanische Gesellschaft/German Botanical Society

Original languageEnglish (US)
Pages (from-to)355-361
Number of pages7
JournalBotanica Acta
Volume101
Issue number4
DOIs
StatePublished - Jan 1 1988

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extensibility
barley
salinity
compliance
leaf development
leaves
cultivars
Hordeum vulgare
growth retardation
nutrient solutions
salt stress
seedlings
tissues

All Science Journal Classification (ASJC) codes

  • Plant Science

Cite this

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abstract = "The growth of barley (Hordeum vulgare L.) leaves is reduced by salinity. We used the Instron extensometric technique to measure the reversible and irreversible compliance of the expanding regions of growing barley leaves from plants exposed to 1, 40, 80 and 120 mM NaCl in nutrient solution. Two barley cultivars differing in salinity resistance (cv ‘Arivat’ and cv ‘Briggs’) were compared over 5d of leaf growth. During the period of most active leaf expansion, salinity reduced reversible compliance and increased compliance in the leaf segments, although responses to salinity were complex and changed over the course of leaf expansion. Salinity increased irreversible compliance more in the salt‐sensitive cultivar Arivat than in the more salt‐tolerant cultivar Briggs. Elemental analysis of the basal leaf segments used for extensometry revealed an accumulation of Na and a depletion of Ca in segments from salinized plants, resulting in very high Na: Ca ratios in salinized expanding tissue. The concentrations of K and Mg in basal leaf tissue were elevated by salinity. Our data do support the hypothesis that the inhibition of leaf expansion by salinity stress is mediated by a decline in irreversible extensibility. We suggest that reduced Ca availability in expanding leaf tissue may contribute to growth reduction in salt‐stressed barley seedlings. 1988 Deutsche Botanische Gesellschaft/German Botanical Society",
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Effects of Salinity on the Extensibility and Ca Availability in the Expanding Region of Growing Barley Leaves. / Lynch, Jonathan Paul; Thiel, G.; Läuchli, A.

In: Botanica Acta, Vol. 101, No. 4, 01.01.1988, p. 355-361.

Research output: Contribution to journalArticle

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