Functional significance of shade-induced leaf senescence in dense canopies: an experimental test using transgenic tobacco.

@article{Boonman2006FunctionalSO,
  title={Functional significance of shade-induced leaf senescence in dense canopies: an experimental test using transgenic tobacco.},
  author={Alex Boonman and Niels P. R. Anten and Tom A Dueck and Wilco J R M Jordi and Adrie van der Werf and Laurentius A. C. J. Voesenek and Thijs L. Pons},
  journal={The American naturalist},
  year={2006},
  volume={168 5},
  pages={597-607}
}
Canopy photosynthesis models have predicted an optimal leaf area index (LAI; leaf area per unit surface area) and leaf nitrogen distribution at which whole-plant carbon gain per unit N is maximized. In this study we experimentally tested these models, using transgenic P(SAG12)-IPT tobacco (SAG; Nicotiana tabacum L.) plants with delayed leaf senescence and therefore a greater LAI and more uniform N distribution than the wild type (WT). In a competition experiment, the increased density of… CONTINUE READING

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