@article{Di Benedetto_Molinari_Fujinuma_Pagani_Buyatti_Giardina_2019, title={Impatiens ‘New Guinea’ (Impatiens hawkeri Bull) Hormonal Effects during the Post-transplant Biomass Accumulation}, volume={10}, url={https://rajpub.com/index.php/jaa/article/view/8119}, DOI={10.24297/jaa.v10i0.8119}, abstractNote={<p>Pot ornamental plant productivity is related to the environmental growth facilities but negatively affected by the pot root restriction syndrome so during nursery as the post-transplant stage. The physiological mechanism involved included both the synthesis and translocation of auxins and cytokinins. However, clear sink-source and dose-response relationships of exogenous plant regulators such as indole acetic acid (AIA) and benzyl amino purine (BAP) and environment on biomass accumulation in most ornamental foliage plants, including New Guinea <em>Impatiens </em>(<em>Impatiens hawkeri</em>) are lacking. The aim of this work was to analyze the effects of an exogenously shoot-applied auxin and a cytokinin, separately or successively, on the post-transplant biomass accumulation of <em>I. hawkeri </em>through the anatomical, morphological and physiological changes observed. Two experiments were performed. The first experiment included the response to only BAP-sprayed plants (0, 5, 50, or 100 mg L<sup>-1</sup>). For the second experiment, rooting cuttings of <em>I. hawkeri </em>were sprayed with different concentrations of IAA (0, 5, 50, or 100 mg L<sup>-1</sup>) followed by different BAP concentrations (0, 5, 50, or 100 mg L<sup>-1</sup>) one week later to run-off at sunset. Results showed that (a) a single BAP or AIA dose increased increase post-transplant biomass accumulation through a higher leaf area expansion and photo assimilate production, (b) as a result of both AIA and BAP spray, the higher NAR the higher post-transplant biomass accumulation, (c) leaf anatomical changes (leaf thickness, intercellular spaces) let a higher carbon dioxide diffusion and fixation with a correlative increase in photo assimilates, (d) a higher root system would be related to a higher cytokinin synthesis. In summary, similarities between responses to either hormone, together with the lack of any IAA - BAP interaction, provide two independent routes for commercial growers to increase the productivity of <em>I. hawkeri </em>ornamental plants by using early foliar sprays.</p>}, journal={JOURNAL OF ADVANCES IN AGRICULTURE}, author={Di Benedetto, Adalberto and Molinari, Jorge and Fujinuma, Pablo and Pagani, Alberto and Buyatti, Marcela and Giardina, Ernesto}, year={2019}, month={Feb.}, pages={1629–1649} }