Anatomical Changes Involved in the Response of Impatiens wallerana to Different Pre-Transplant Plug Cell Volumes and BAP Sprays

作者：Gandolfo E; De Lojo J; Gomez D; Pagani A; Molinari J; Di Benedetto A^*

来源：European Journal of Horticultural Science, 2014, 79(4): 226-232.

• bedding plant
• cytokinin
• growth
• root restriction

In ornamental plants grown in small pots, root growth is usually restricted. We have recently shown that higher dry weights in Impatiens wallerana plants grown in large plug cell volumes (50-cell trays) are related to higher relative growth rates (RGRs). In this work we observed leaf anatomical post-transplant changes in plants of L wallerana propagated at the pre-transplant stage in different plug cell volumes and sprayed with five BAP (6-benzylaminopurine) concentrations. Results showed that higher RGRs were mainly associated with increased net assimilation rates. In contrast the leaf area ratio seemed to be less important for RGR. Anatomical changes such as leaf thickness, stomata density and intercellular spaces seemed to contribute to increased photosynthetic capacity. We also found that a large leaf photosynthetic area was related to large epidermal cell size.

• 出版日期2014-8