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Split-line regression between the fraction of transpirable soil water content in the water-stressed plants of two chickpea cultivars, DICC8156 and DICC8172, and pre-dawn leaf water potential (A), rate of leaf photosynthesis (B), stomatal conductance (C), and rate of leaf transpiration (D), showing break point values where the slope of the fitted regression changed significantly. Data in B, C, and D are relative to the well-watered control and all are means of three replicates.
