Physiological responses to salinity in turfgrass

K. B. Marcum

    Research output: Chapter in Book/Report/Conference proceedingChapter

    1 Citation (Scopus)

    Abstract

    Critical freshwater shortages are occurring in urban population centres worldwide. Overuse of freshwater resources, coupled with effects of global warming such as salt water intrusion and desertification are resulting in salinization of water and soil resources. Many governments have responded by placing restrictions on the use of freshwater for irrigating turfgrass landscapes, instead requiring use of secondary saline water sources. Progress has been made in understanding turfgrass salinity tolerance mechanisms, and in development of salt tolerant turfgrass cultivars and alternate native species. Turf-type grass species show extreme range in salt tolerance, from salt-sensitive to seawater tolerant. Salinity tolerance in turfgrass species is associated with stimulated root, and sometimes shoot growth under moderate salinities, resulting in increased root/shoot ratios. Shoot saline ion regulation, coupled with minimal yet complete osmotic adjustment, is a key salinity tolerance mechanism in grasses. In Chloridoid grasses, which include most C4 turfgrasses, ion regulation is largely achieved by leaf salt gland excretion. Under saline conditions, osmotic adjustment in turf-type grass species is achieved predominately with saline ions, compartmentalized in vacuoles. Of potential compatible solutes, only glycinebetaine accumulates to levels sufficient for cytoplasmic osmotic adjustment in these species.

    Original languageEnglish
    Title of host publicationMiddle East Horticultural Summit
    EditorsD.E. Aldous, E.W. Hewett, E.G. Neumann
    PublisherInternational Society for Horticultural Science
    Pages105-116
    Number of pages12
    ISBN (Electronic)9789462610392
    DOIs
    Publication statusPublished - Sep 26 2014

    Publication series

    NameActa Horticulturae
    Volume1051
    ISSN (Print)0567-7572
    ISSN (Electronic)2406-6168

    Keywords

    • Compatible solute
    • Euhalophyte
    • Excretion
    • Halophyte
    • Osmotic adjustment
    • Salt gland
    • Salt tolerance

    ASJC Scopus subject areas

    • Horticulture

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