TITLE:
Time for cotton to uptake water of a known isotopic signature as measured in leaf petioles
AUTHORS:
Timothy S. Goebel, Robert J. Lascano
KEYWORDS:
Cotton; Stable Isotopes; Water Use
JOURNAL NAME:
Agricultural Sciences,
Vol.5 No.2,
February
17,
2014
ABSTRACT: While stable isotopes
of water have been used to study water movement through the environment, they
generally have not been used to examine shorter, more transient events, e.g.,
rainfall of Gossypium hirsutum (L.))
plants were grown in a greenhouse and the time required for the enriched water
added the soil to show up in the meristematic
petioles of cotton leaves was measured. The initial divergence from the irrigation water signature occurred as
quickly as 4 hours. The water from the sampled petioles then reached
equilibrium with the new source water within 12 hours.