Abstract
Abstract Shoot apical meristems produce stem tissues, produce leaves, and produce flowers. Cell proliferation characteristics of meristems are dependent upon cell maturation processes and the functions of newly formed cells. Cells of stem terminals depend upon water availability from other plant portions. Inadequate moisture availability to stem terminals reduces shoot growth rates and leaf production rates. Xylem conductivity measurements of terminal shoot meristems and small leaves were approximated using the Hagen-Poiseuille equation to determine relationships between xylem contributions to leaves versus xylem conductivity within stems. Analyses of petiole and stem xylem conductivities for the 23 herbaceous plant species were confined to stem terminals that only had primary xylem cells in stems and only five leaves or leaf pairs. Among stem segments (10 mm to 64 mm in length) among species, the largest leaf areas ranged from 2.34 cm2 to 54 cm2, stem diameters ranged from 0.82 mm to 3.83 mm, and maximum...
Published Version
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