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Photosynthetic Response to Water Stress in Phaseolus vulgaris
Author(s) -
O'TOOLE J. C.,
OZBUN J. L.,
WALLACE D. H.
Publication year - 1977
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1977.tb01505.x
Subject(s) - phaseolus , photosynthesis , transpiration , compensation point , rubisco , biology , botany , abscisic acid , pyruvate carboxylase , stomatal conductance , horticulture , enzyme , biochemistry , gene
Water stressed Phaseolus vulgaris L. plants were monitored to detect the relationships between net photosynthesis, transpiration, boundary layer plus stomatal resistance, mesophyll resistance, CO 2 compensation point, ribulose, 1,5‐diphosphate carboxylase activity and leaf water potential. At full expansion, the first trifoliate leaves of greenhouse grown bean plants were subjected to water stress by withholding irrigation. Gas exchange and enzyme activity of the central trifoliolate leaflets were monitored as leaf water potential decreased. Although increased stomatal resistance appeared to be the primary causal factor of reduced net photosynthesis, increased mesophyll resistance and decreased ribulose 1,5‐diphosphate carboxylase activity further documented the role of non‐stomatal factors.