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Contribution of the wheat (Triticum aestivum L.) flag leaf to grain yield in response to plant growth regulators

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Abstract

In West-Europe, intensive cereal management uses plant growth regulators (PGRs) especially for wheat. A green-house experiment compared the effects of two PGRs on flag leaf characteristics and yield of winter wheat. Chlormequat chloride + choline chloride (CCC) and chlormequat chloride + choline chloride + imazaquin (CCC+I) were applied to winter wheat at growth stage 5 (Feekes Large scale). CCC and CCC+I significantly increased flag leaf surface area at anthesis. Both treatments also enhanced chlorophyll content of the main stem flag leaf. The grain filling period was extended with PGR application by 2 days. CCC and CCC+I significantly increased net CO2 assimilation rates during the flag leaf life. No effects of PGR spraying were observed on the pattern of 14C labelled assimilate distribution. Increased grain yield was due to the increase in average grain weight. The results indicate that PGR treatments increased flag leaf contribution to grain filling. The addition of imazaquin (I) to chlormequat (CCC) improved the effects of CCC.

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Authors and Affiliations

  1. Laboratoire Agronomie et Environnement, ENSAIA-INRA, 2 Av de la Forêt de Haye, F-54500, Vandoeuvre les Nancy, France

    D. Stahli, D. Perrissin-Fabert, A. Blouet & A. Guckert

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  1. D. Stahli
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  2. D. Perrissin-Fabert
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  3. A. Blouet
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  4. A. Guckert
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Stahli, D., Perrissin-Fabert, D., Blouet, A. et al. Contribution of the wheat (Triticum aestivum L.) flag leaf to grain yield in response to plant growth regulators. Plant Growth Regul 16, 293–297 (1995). https://doi.org/10.1007/BF00024789

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  • DOI: https://doi.org/10.1007/BF00024789

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