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| Study on the physiological and morphological effects of pitaya under drought stress |
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| DOI：10.16768/j.issn.1004-874X.2018.03.005 |
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| Abstract: |
| In order to explore the effects of different degree of drought stress on the pitaya plant morphological
and physiological indexes，with Dahong pitaya plant as material，the morphological and physiological changes of
pitaya plant were studied by using pot with water，the drought treatment after 40，47，54 days，respectively. The
drought resistance characteristic of pitaya were also studied in this paper. The results showed that pitaya plant has
a good drought tolerance，and it could adjust the physiological indexes in the body to adapt the drought conditions
under defferent degree of drought stress，the change trend of different physiological indexes was different in drought
period. With the deepening of drought stress，pitaya plant grew slowly，colour of stems deepened and surface of stems
shriveled，the main root became short and number of root division changed less. Compared with controls，the content
of free praline（ Pro） and soluble sugar remarkable up-regulated in treatment significantly，content of soluble protein
and malondialdehyde（ MDA） was lower after first increases，peroxidase（ POD） activity significantly increased after
significantly reduce，catalase（ CAT） activity also show the first trend lowered later，superoxide dismutase（ SOD）
activity continued to decline. |
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