Item – Theses Canada

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OCLC number
824499457
Link(s) to full text
LAC copy
LAC copy
Author
Farid, Mehdi.
Title
Variation for whole plant water use efficiency and leaf-level traits affecting drought tolerance in soybean.
Degree
M. Sc. -- University of Guelph, 2011
Publisher
Ottawa : Library and Archives Canada = Bibliothèque et Archives Canada, [2012]
Description
2 microfiches
Notes
Includes bibliographical references.
Abstract
<?Pub Inc> Genotypic variation for water use efficiency and a correlated leaf-level trait, the dark-adapted leaf epidermal conductance (gdark ) has been previously identified among soybean cultivars adapted to Ontario, Canada. In the present work, parents of existing soybean mapping populations were screened for variation in these two traits to identify populations that would be suitable for identifying chromosomal regions controlling the traits. Second, a comparison of greenhouse and field data demonstrated that greenhouse screening experiments could predict cultivar differences for g dark in the field, but only when plants in the greenhouse were grown under a cyclic drought treatment. Third, greenhouse experiments were conducted to examine restrictions to photosynthesis in six soybean cultivars during recovery from drought stress. No treatment by cultivar interactions were found. Compared to control plants, drought-stressed plants showed residual limitations to photosynthesis 24 h after rewatering. The lower photosynthetic rates were primarily caused by reduced mesophyll conductance.
ISBN
9780494800065
0494800062