| Phenotypic and physiological drought resistance responses of Zanthoxylum armatum-Toddalia Asiatica grafted tree |
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| DOI：10.7606/j.issn.1000-7601.2023.05.17 |
| Key Words: Zanthoxylum armatum Toddalia asiatica stock grafting resistance yield |
| Author Name | Affiliation | | WANG Fei | Southwest Research Center for Landscape Architecture Engineering State Forestry and Grassland Administration in Southwest Forestry University, Kunming, Yunnan 650224, China | | HAO Jiabo | Yunnan Academy of Forestry and Grassland Sciences, Kunming, Yunnan 650201, China | | HU Qing | Yunnan Academy of Forestry and Grassland Sciences, Kunming, Yunnan 650201, China | | GUO Yongqing | Yunnan Academy of Forestry and Grassland Sciences, Kunming, Yunnan 650201, China | | RAO Shaosong | Ludian Forestry and Grassland Bureau, Zhaotong, Yunnan 657199, China | | LU Bin | Yunnan Academy of Forestry and Grassland Sciences, Kunming, Yunnan 650201, China | | XIN Peiyao | Southwest Research Center for Landscape Architecture Engineering State Forestry and Grassland Administration in Southwest Forestry University, Kunming, Yunnan 650224, China |
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| Abstract: |
| To explore the drought resistance mechanism of Toddalia asiatica as rootstock grafting Zanthoxylum armatum, the differences in root characteristics, leaf anatomical structure, photosynthetic pigment and physiological indexes of T. asiatica, Z. armatum and their grafted tree were compared and analyzed, and the yield was measured. The results showed that each index of 1-year-old T. asiatica seedlings root system was significantly higher than Z. armatum. Comparing to Z. armatum, the thickness of palisade tissue and spongy tissue of grafted tree leaf increased by 46.57% and 35.38%, and the palisade spongy ratio and the compactness of mesophyll increased by 9.24% and 21.82%. The thickness of grafted tree palisade tissue and sponge tissue were significantly increased compared to Z. armatum, and the palisade spongy ratio and the compactness of mesophyll were also significantly improved. The contents of chlorophyll a, chlorophyll b and carotenoid in grafted tree leaves were significantly increased by 13.5%, 87.3% and 33.5% compared with Z. armatum. Meanwhile, the activities of SOD and POD were respectively increased by 22.1% and 6.4%, and the content of MDA was decreased by 4.6%. The correlation analysis showed that the content of photosynthetic pigments was significantly positively correlated with the thickness of palisade tissue, while the content of MDA was significantly negatively correlated with the rest of the indicators, except for sponge tissue thickness. The yield results showed that the yield per unit projected area of the grafted tree was 34.1% higher than that of Z. armatum. In conclusion, the grafting combination can be applied to the breeding and popularization of drought\|resistant rootstock of Z. armatum. |
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