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Gas Exchange and Water Relations in Water and Salinity Stressed Wheat Lines
Author(s) -
Zerbi G.,
Morgan J. A.,
Lecain D. R.
Publication year - 1991
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.1991.tb00877.x
Subject(s) - transpiration , salinity , water use efficiency , stomatal conductance , agronomy , chemistry , water vapor , zoology , poaceae , water content , carbon dioxide , moisture , relative humidity , water stress , water use , photosynthesis , horticulture , botany , biology , irrigation , ecology , geology , meteorology , geotechnical engineering , organic chemistry , physics
Differences in gas exchange parameters i.e. carbon exchange rate (CER), transpiration (Tr), water vapor conductance (g) were investigated, under a controlled environment, in a semi‐dwarf (SD) Triticum aestivum line, its tall (TL) near isoline and the Payne (PA) variety characterized by small leaves. The plants were maintained in: (a) optimal substrate moisture condition (CTR); (b) salinized by watering with a 0.12 m NaCl solution (SLT); (c) water stressed by withholding waterings during a period of six days (STR); (d) stressed and salinized during the same period and with the same saline solution (S + S). CER and Tr were negatively affected by the stresses; SLT and S + S treatments had a higher WUE compared to their respective controls CTR and STR. SD line had a better performance in terms of CER and WUE, particularly when water and salt stresses interacted. Leaf anatomy and assimilation/internal CO 2 concentration curves contributed to explaining the SD performance.