Relationship of water stress-induced proline accumulation and yield in corn
1993
Nawarat Udomprasert | Rachain Thiraporn (Kasetsart Univ. Kamphaengsaen Campus, Nakhon Pathom (Thailand). Faculty of Agriculture. Dept. of Agronomy)
Corn is one of important economic crops in Thailand that has faced big environmental limitation such as drought. Without physiological parameters, corn selection for drought tolerance would be impeded. The objective of this study was to determine proline content accumulated due to water stress treatments and its relationship to corn yield and whether proline content could be used as parameter for corn drought tolerance selection. The inbred line K13 and the F1 hybrid DK 888 were subjected to water stress at different stages of development, i.e. vegetative, tasseling, silking, and grain filling stages. Proline content was determined during water stress treatment and after recovery using spectrophotometric technique. Water stress had the greatest effect on proline content and yield when treated at tasseling stage in both varieties. Proline content and corn yield were negatively correlated in both varieties. This consistency suggested that proline content might be used as parameter for corn drought tolerance selection.
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