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Water Stress, Water Use Efficiency, Carbon Isotope Discrimination and Leaf Gas Exchange Relationships of the Bush Bean
Author(s) -
RaeiniSarjaz M.,
Barthakur N. N.,
Arnold N. P.,
Jones P. J. H.
Publication year - 1998
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.1998.tb00387.x
Subject(s) - water use efficiency , transpiration , stomatal conductance , agronomy , photosynthesis , water content , soil water , chemistry , horticulture , environmental science , biology , botany , soil science , geotechnical engineering , engineering
Water use efficiencies for the whole plant (WUE 1 ) and single leaves (WUE 1 ) were studied in a greenhouse as a function of soil moisture during four phenological stages of bush bean growth. WUE 1 increased significantly with soil moisture stress and attained its maximum value before the flowering stage. WUE 1 and WUE 1 were linearly related ( r = 0.92), and WUE 1 was correlated with the transpiration rate ( r = ‐0.87), stomatal conductance ( r = ‐0.80) and photosynthetic rate ( r = 0.81). Carbon isotope discrimination.), decreased as soil moisture decreased, and) was negatively correlated with both WUE 1 ( r = ‐0.92) and WUE 1 ( r = ‐0.88). There were significant differences in leaf N among water regimes.