  Premise of the Study: Impatiens is a commonly seen garden flower, renowned
for its strong adaptability and long history of cultivation. However, seldom
has any research touched on its physiological resistance mechanism. In this
experiment, the impatiens is selected from those which experienced aerospace
mutation and thereafter 12 years of cultivation and breeding. Therefore, it is
superior to the non-mutagenized impatiens in terms of drought resistance and
demonstrates tremendous differences from the normal impatiens in physiology,
which intrigues scholars to search for the underlying reasons . Methods: By
reference to Impatiens balsamina L,this experiment uses mutagenized impatiens
seeds, processed by PEG-6000 in different solution concentration, to measure
the germination rate of impatiens, its relative enzymatic activity and
expression differences between gene SoS2 and gene RD29b in the drought lower
reaches. Key results: Under simulated drought stress, there is no distinct
difference between the mutagenized impatiens and the normal impatiens in terms
of germination rate. But by measuring the root tillers and the length, the
relative enzymatic activity, MDA, and the expression differences between gene
SoS2 and gene RD29b in the drought lower reaches, it is verified that the
mutagenized impatiens has more advantages than the normal impatiens, and it Can
further cultivate become drought resistance varieties impatiens. Conclusions:
In this experiment,which is a positive mutation, the mutagenized impatiens
improves drought resistance through radiative mutation. The so obtained
impatiens is more pleasing in sight in terms of color and shape and has higher
application value in garden virescence.
