کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4569825 1331357 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Response of “Sangiovese” grapevines to partial root-zone drying: Gas-exchange, growth and grape composition
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش باغداری
پیش نمایش صفحه اول مقاله
Response of “Sangiovese” grapevines to partial root-zone drying: Gas-exchange, growth and grape composition
چکیده انگلیسی

Our study focuses on the physiological response and yield-quality performance of split-root potted Sangiovese grapevines under a partial root-zone drying (PRD) regime from pre-veraison to harvest by withholding water from one of the two pots and comparing the results to a well-watered control (WW). While predawn water potential (ψpd) tended to equilibrate in PRD with the soil moisture level of the wet pot, both stem (ψst) and mid-day leaf-water potential (ψl) were markedly lower in PRD as compared to WW vines, indicating that Sangiovese shows anisohydric response. On the other hand, the seasonal reduction of leaf assimilation rate (A) in PRD over the 6-week stress period versus WW was 16% as compared to a 41 and 25% for leaf stomatal conductance (gs) and transpiration (E), respectively. As a consequence, intrinsic WUE (A/gs) was markedly increased in the half-stressed vines, suggesting a response more typical of an isohydric strategy. Shoot growth was promptly checked in PRD vines, which had no limitation in yield and better grape composition as per soluble solids and total anthocyanins. These responses occurred in spite of sub-optimal leaf photosynthesis rates and lowered leaf-to-fruit ratio and qualify Sangiovese as a good candidate for adapting to regulated deficit irrigation strategies.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Scientia Horticulturae - Volume 114, Issue 2, 2 October 2007, Pages 96–103
نویسندگان
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