Response of eggplant to drought. I. Plant water balance

M.H. Behboudian

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    12 Citations (Scopus)


    Eggplant (Solanum melongena L.) is known to have a higher resistance to drought than have other vegetables. Studies were made to see whether this property can be explained by its physiological responses. Water was withheld from plants and measurements were made of sap osmotic potential (ψos), leaf pressure potential (ψp), stomatal diffusive resistance to water vapour (rs), relative water content of leaf (RWC), whole plant transpiration, leaf water potential (ψleaf), and soil water potential (ψsoil). The first 4 parameters varied linearly with ψleaf and transpiration varied exponentially. There was a parabolic relation between ψleaf and ψsoil. The severely stressed plants were rewatered and underwent the same measurements 1 day later (“recovery treatment”). Compared with some other vegetables reported in the literature, ψp and RWC remained higher in droughted eggplant. This species has also a better stomatal control on transpiration. There was an after-effect of drought on the stomates. In recovery treatment, ψp values exceeded those of the control. This may have functional significance in resumption of growth after stress is alleviated.

    Original languageEnglish
    Pages (from-to)303-310
    JournalScientia Horticulturae
    Issue number4
    Publication statusPublished - 1977

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