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The relationship of proline content and metabolism on the productivity of maize plants

Teklić, Tihana; Agić, Dejan; Špoljarević, Marija; Lisjak, Miroslav; Gumze, Andrej; Wilson, Ian D.; Hancock, John T.


Tihana Teklić

Dejan Agić

Marija Špoljarević

Miroslav Lisjak

Andrej Gumze


The free proline content in maize ear-leaves, silk and pollen were analyzed in field grown plants which had matured to the pollination stage. Using maize hybrids PR34F02, PR35P12 and PR36B08 field trials were set up at two locations in eastern croatia in two different years. Two enzymes of proline metabolism were analyzed in the same leaf samples and specific activities of synthetase (P5cS) and proline dehydrogenase (PDh). Plant productivity was evaluated at harvest by the estimation of total and fully developed grain number per ear and per plant, the mean single grain mass, and the mass of grain per plant. The year in which the plants were grown had a very significant effect on the free proline content in the leaf and pollen, as well as on the enzyme activities assayed. The differences between the plants from the two localities were very significant in all tested parameters of plant grain productivity. There was a significant genotype effect on proline content and P5cS total activity in leaf and on all the productivity parameters. Some of the correlations established suggest that the rate of proline synthesis and degradation in maize ear-leaf at pollination might contribute to the final grain production of the maize plant. Multiple regression analyses was used to further analyze the relationship between proline and grain productivity, but it is clear that future work should include other environmental conditions, plant species and organs such as roots. © 2011 Landes Bioscience.


Teklić, T., Agić, D., Špoljarević, M., Agic, D., Lisjak, M., Gumze, A., …Teklic, T. (2011). The relationship of proline content and metabolism on the productivity of maize plants. Plant Signaling and Behavior, 6(2), 251-257.

Journal Article Type Article
Publication Date Feb 1, 2011
Journal Plant Signaling and Behavior
Print ISSN 1559-2316
Electronic ISSN 1559-2324
Publisher Taylor & Francis
Peer Reviewed Peer Reviewed
Volume 6
Issue 2
Pages 251-257
Keywords plant science, plant stress, proline
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