The Drought-Stress Response of a Drought Resistant Impatiens Processed in PEG-6000 Solution in a Simulation Test

TL;DR

This study investigates the drought resistance mechanisms of a mutagenized Impatiens plant, showing enhanced physiological traits under simulated drought conditions, which could lead to more resilient garden varieties.

Contribution

It demonstrates that radiative mutation via PEG-6000 treatment enhances drought resistance in Impatiens, with physiological and genetic evidence supporting this improvement.

Findings

Mutagenized Impatiens shows no germination difference under drought stress.

Mutagenized Impatiens has better root growth and enzymatic activity.

Genetic expression of drought-related genes is higher in mutagenized plants.

Abstract

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.