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Integrated Stomatal Opening as an Indicator of Water Stress in Zea 1
Author(s) -
Fiscus Edwin L.,
Wullschleger Stan D.,
Duke Harold R.
Publication year - 1984
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1984.0011183x002400020009x
Subject(s) - biology , water stress , horticulture , botany
A technique based on mass flow porometry is described which allows continuous monitoring of stomatal aperture in the field. The relationship between the integral of the light intensity for a 24‐h period (ILI) and the integral of the stomatal opening (ISO) of well exposed leaves for the same period provides a very sensitive indicator of the onset of stress. Experimental data from 2 years of operation in the field showed good year to year agreement between the maximum ISO values attainable at any ILI.