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Genotypic Responses in Sorghum to Drought Stress. II. Leaf Tissue Water Relations 1
Author(s) -
Blum A.
Publication year - 1974
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/cropsci1974.0011183x001400050024x
Subject(s) - biology , sorghum , dehydration , sweet sorghum , water stress , sorghum bicolor , agronomy , genotype , drought resistance , water saturation , horticulture , botany , biochemistry , geotechnical engineering , porosity , gene , engineering
The sigmoid relationship between leaf water saturation deficit (WSD) and leaf water potential, as a measure of dehydration avoidance, was investigated in 10 sorghum ( Sorghum bicolor L. Moench.) genotypes grown in the field in 1971 and 1972. The leaf water potential at which an exponential increase in WSD commenced appeared to vary among genotypes, ranging from about −10 to −12 bars in Feterita and RS‐610 to −16 bars in Hegari. When genotypes were ranked according to mean increase in WSD per unit decrease in leaf water potential, the greatest dehydration avoidance was observed in Hegari and the Kafirs, and the least in RS‐610 hybrid and Feterita.