Which celebrities have studied Dendrobium candidum or what ancient books have recorded it?

(1) The sexual reproduction rate of Dendrobium candidum is very low, so it is usually propagated by asexual propagation methods, such as ramets and cuttings, and there are also plant tissue culture techniques. There are few viruses near meristem, even no viruses, so the plants cultured from shoot tip plants are almost virus-free. The genotypes of callus cultured from different parts of the same Dendrobium candidum are not necessarily the same, such as callus formed by dedifferentiation of pollen cells and somatic cells.

(2) According to the above analysis, sucrose can provide energy for growth and differentiation; Light energy promotes cell differentiation.

(3) Dendrobium candidum is a plant cell. When it is used as an experimental material for extracting DNA, compared with extracting DNA from chicken blood cells, grinding steps are usually added in the experimental process to destroy the cell wall. The principle of DNA extraction is to use the different solubility of DNA in NaCl solutions with different concentrations to dissolve or separate DNA from other substances.

(4) Gene expression vectors generally include promoters, terminators, replication origins, (insect-resistant) target genes and marker genes.

(5) Sound wave stimulation can promote the synthesis of Dendrobium candidum polysaccharide, in which sound wave belongs to physical information.

So the answer is:

(1) Plant tissue culture is almost virus-free, not necessarily the same.

(2) Sucrose provides energy for growth and differentiation, and light promotes cell differentiation.

(DNA has different solubility in different concentrations of NaCl solution. Choosing appropriate concentration of NaCl can dissolve or precipitate DNA, so it can be separated from other substances.

(4) Promoter and terminator

(5) Physics