| Protective effect and physiological mechanism of different protective measures on early maturing persimmon shooting |
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| DOI：10.7606/j.issn.1000-7601.2024.04.07 |
| Key Words: persimmon tree shoots shriveling protective measures shoot shriveling rate water status cell viability non\|structural carbohydrate content (NSC) |
| Author Name | Affiliation | | LIU Gege | College of Forestry Science, Shanxi Agricultural University, Taigu, Shanxi 030801, China | | HOU Rui | College of Forestry Science, Shanxi Agricultural University, Taigu, Shanxi 030801, China | | WANG Ningning | College of Forestry Science, Shanxi Agricultural University, Taigu, Shanxi 030801, China | | HUANG Junbao | Institute of Fruit Trees of Shanxi Agricultural University, Taigu, Shanxi 030801, China | | ZHANG Yongbing | Institute of Fruit Trees of Shanxi Agricultural University, Taigu, Shanxi 030801, China | | WANG Lin | College of Forestry Science, Shanxi Agricultural University, Taigu, Shanxi 030801, China | | LV Yingzhong | Institute of Fruit Trees of Shanxi Agricultural University, Taigu, Shanxi 030801, China |
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| Abstract: |
| This study selected early maturing persimmon saplings planted for one year as the research object. The measures for preventing shoots shriveling were set up with seven treatments: wrapping cold resistant cloth + reflective film on the trunk, planting soil on the trunk, applying limewater on the trunk, wrapping cold resistant cloth on the trunk, spraying fruit preservation agent on the branches, spraying high\|lipid film on the branches, and spraying paraffin emulsifier on the branches. The shoots shriveling rates, water status, cell viability, and the content of non\|structural carbohydrates (NSC) of annual branches of different treatments were recorded. Results showed that the shoots shriveling rates of wrapping cold resistant cloth + reflective film on the trunk and planting soil on the trunk treatments was 0 while treatments of spraying fruit preservation agent, spraying high\|lipid film, and spraying paraffin emulsifier were between 30% and 60%, and the treatments of applying limewater, wrapping cold resistant cloth, and control were 100%. The predawn water potential of paraffin emulsifier, cold resistant cloth + reflective film, and planting soil treatments was significantly higher than that of fruit preservation agent and high\|lipid film treatments (P<0.05), with a difference of about 0.5 MPa between the two groups. The branch percentage loss of conductivity (PLC) treated with planting soil was significantly reduced compared to fruit preservation agent and high\|lipid film (P<0.05), with a decrease of 10.95% and 11.24%, respectively. The phloem cell viability of planting soil treatment was significantly increased compared to other treatments, with an increase of 13.53% to 34.87% (P<0.05). The soluble sugar content, starch content, and NSC content in the phloem treated with planting soil treatment were significantly increased compared to other treatments (P<0.05), with increases of 13.79%~28.80%, 9.15%~39.65%, and 14.87%~29.61%, respectively. The soluble sugar content, starch content, and NSC content in the xylem treated with planting soil treatment were significantly increased compared to other treatments (P<0.05), with increases of 20.59%~35.27%, 14.19%~37.90%, and 17.40%~37.00%, respectively. The correlation analysis results indicated that the shoots shriveling rates under different protective measures was significantly positively correlated with the branch PLC(P<0.05), but negatively correlated with the predawn water potential,xylem relative water content, phloem cell viability, xylem starch content, and xylem NSC content of the branches (P<0.05). The results suggest that the treatments of cold resistant cloth + reflective film and planting soil had good protective effects on the winter and spring shoots shriveling of persimmon trees, which could better protect the water status and phloem cell vitality and promote the transportation of NSC to the branches. |
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