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Synthesis of Osmotically Active Substances in Winter Wheat Leaves as Related to Drought Resistance of Different Genotypes 1 )
Author(s) -
Martin M.,
Miceli F.,
Morgan J. A.,
Scalet M.,
Zerbi G.
Publication year - 1993
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.1993.tb00129.x
Subject(s) - cultivar , genotype , water stress , winter wheat , drought resistance , economic shortage , horticulture , chemistry , betaine , biology , agronomy , biochemistry , gene , linguistics , philosophy , government (linguistics)
Water stress increased mono‐saccharides and decreased di‐saccharides concentration in four field grown genotypes, regardless of their different drought susceptibility. Sandy, a USA genotype known for giving satisfying yields in droughty environments, outstood the other cultivars in terms of betaine and proline concentration in leaf tissues; these aminoacids are therefore considered responsible for the most negative Ψs perceived in this cultivar. PV‐curve technique revealed for Tullio, the drought susceptible Italian genotype, an osmotic adjustment of –0.63 MPa, four times greater than in Pandas, though this drought resistant cultivar showed a similar content in osmotically active substances; the authors therefore hypothesize an alternative mechanism in the response to water shortage in Tullio .