The invention discloses
a DNA fragment related to
drought tolerance and alkali resistance of a
plant and application thereof. The
DNA fragment is originated from Boea hygromettica(Bunge)R. Br and composed of a
nucleotide sequence
ranging from site 7 to site 6375 in a sequence 1 in a sequence table. Under the condition of osmotic stress of PEG with a concentration of 25%, the main root of a T3-generation homozygous transgenic
Arabidopsis thaliana
plant which transfers the
DNA fragment is substantially longer than the main root of a wild
Arabidopsis thaliana
plant; and under the condition of alkaline stress of the pH value of 8.0, the number of lateral roots of the transgenic
Arabidopsis thaliana plant is substantially more than the number of lateral roots of the wild
Arabidopsis thaliana plant, and the overground part of the transgenic
Arabidopsis thaliana plant is more thriving. The
DNA fragment provided by the invention has critical theoretical and practical significance to breeding of novel species of drought-tolerant and alkali-resistant crops, forests and grass, is applicable to cultivation and identification of plant varieties with resistance desired in farming and
animal husbandry and in
ecological environment treatment and provides a specific anti-adversity resource
gene which cannot be provided by model plants and crops for cultivation of plants with
high stress tolerance.