Plant Spacing Effects on Stem Development and Secondary Growth in Nicotiana tabacum

Plant spacing usually refers to distances between plants within and rows in the field. Different crop planting would generally influence size, plant architecture, economic productivity, etc. The present research provided a time course monitoring of stem development tobacco with different spacing. result showed that cambium activity, vascular bundle thickness, lignin, cellulose, hemicellulose content, as well macronutrient deposition varied because Furthermore, genes (NtHB8s NtNST3s) coding homologs HB8 NST3 transcription factors, which are involved secondary growth, were cloned tobacco. In course, they also indicated diverse expression patterns among altered plant-spacing treatments. Their transcriptomic activities validated, motifs might bind factors their promoter regions predicted. Promoters NtHB8s NtNST3s rich light-response elements; result, light be main environmental factor regulate growth.