Growth Dynamics of Dendrobium catenatum Tissue Culture Seedlings During Post-transplantation Domestication Stage
The growth dynamics and influence factors of D. catenatum tissue culture seedlings during post-transplantation domestication stage were studied. The results showed that positive correlation was found between morphological characteristics change of tissue culture seedlings and time. The plant height, root diameter, root number, stem diameter and leaf thickness were extremely significantly different, root length and leaf length-width ratio were significantly different, leaf number and node number were not significantly different, and leaf color changed obviously. The biomass changed mainly in the accumulation of stem. In the beginning leaf accounted for the largest proportion, but later the stem increased the proportion. In addition, the accumulation ratio of root biomass was slower than the stem and leaf. Combined with principal component analysis, the main factors were stem diameter, root diameter, leaf number, node number and root length, the stem diameter and root diameter were priority in most among them. It showed that thickening growth was more important to complete the process than elongation growth.