Effects of Water Stress on Water Use Efficiency and Dry Matter Allocation in Wheat (Triticum aestivum) Based on Stable Isotope Analysis

摘要

A pot experiment was conducted to study whether stable carbon isotope?could be used to evaluate WUE and to reveal the dry matter allocation for wheat. Samples?were collected at six wheat growth stages. The relationships between Δ13C and?WUE depend on sampling part of the wheat, and the most appropriate sampling part for?assessing WUE was leaf. Water stress affected translocation of assimilate from leaves?to other plant parts, and discriminated 13C greater with water stress. Therefore, Δ13C?could be used as a favorable evaluation method to assess WUE and dry matter allocation?in wheat under water limited conditions.