Objective

2

To investigate the effects of inoculation of potassium-solubilizing bacteria on the physiological characteristics of

Paris polyphylla

var.

yunnanensis.

Method

2

The effects of different potassium-solubilizing bacteria on leaf area，photosynthetic pigment content， and active component indexes of

P. polyphylla

var.

yunnanensis

were investigated by pot planting at room temperature.

Result

2

The results showed that the inoculation of potassium-solubilizing bacteria could increase the leaf area of

P. polyphylla

var.

yunnanensis

. The largest average leaf area was observed in the S3 group，reaching 10.497 cm

2

，with a maximum increase of 11.0% compared with that of the CK group. The inoculation of potassium-solubilizing bacteria could increase the content of photosynthetic pigments in leaves. Among them，the increase in chlorophyll a content was significant （

P

<

0.05），which was 80.6% higher than that of the CK group. The chlorophyll a/b values in all treatment groups were higher than that of the CK group. The activities of superoxide dismutase（SOD），catalase（CAT） and peroxidase（POD） in the leaves of

P. polyphylla

var.

yunnanensis

increased by 88.4%，33.8%， and 30.6%，respectively， as compared with that in the CK group. The inoculation of potassium-solubilizing bacteria could promote the accumulation of osmoregulation substances such as soluble sugar and soluble protein in leaf cells

of

P. polyphylla

var.

yunnanensis

，with a maximum increase of 55.3% and 70.5% respectively compared with that of the CK group. Meanwhile，it also reduced the content of malondialdehyde（MDA），with a maximum decrease of 34.1% compared with that of the CK group. The results of correlation analysis showed that there were some correlations between different chemical components in

P. polyphylla

var.

yunnanensis

leaves.

Conclusion

2

The inoculation of potassium-solubilizing bacteria can effectively promote the growth and development of

P. polyphylla

var.

yunnanensis

and improve its survival ability in adversity. It is of practical scientific significance and potential application value for improving the survival rate of

P. polyphylla

var.

yunnanensis

by artificial planting.