| 王顺利,张春华,戚建华,毛晓佩,孙永玉.不同种源高山栲苗期生长及生理分析[J].林业调查规划,2023,48(4):182-187 |
| 不同种源高山栲苗期生长及生理分析 |
| Growth and Physiological Analysis of Castanopsis delavayi Seedlings from Different Provenances |
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| DOI： |
| 中文关键词: 高山栲 种源 幼苗 生长指标 生理生化 |
| 英文关键词: Castanopsis delavayi provenances growth index physiology and biochemistry |
| 基金项目:中央级公益性科研院所基本科研业务经费（CAFYBB2018ZB001-6）；国家重点研发计划项目课题（2017YFC0505102）. |
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| 中文摘要: |
| 以不同种源高山栲幼苗为研究对象，通过抗逆性指标测定以探究不同种源幼苗的环境适应能力，筛选出抗逆能力强的种源。将5个种源高山栲一年生实生苗种植于同一环境，测定其株高、地径、冠幅等生长指标，丙二醛（MDA）含量以及过氧化氢酶（CAT）、超氧化物歧化酶（SOD）、过氧化物酶（POD）等保护酶活性，净光合速率、气孔导度、胞间CO2、蒸腾速率、光响应等生理生化指标。不同种源高山栲幼苗生长及生理性状均表现出显著性差异（P＜0.05）。镇沅种源高山栲幼苗株高和冠幅生长量最大，表明镇沅种源有较好的环境适应性，同时其MDA含量最低，SOD、POD活性最高，表明镇沅种源幼苗的细胞膜受损程度更低且具有较强的抗逆性；光合有效辐射强度段400~800 μmol/（m2·s）内高山栲幼苗达到光饱和点，镇沅和龙陵两个种源在相同光辐射强度下的净光合速率大，光合适应性强。综合不同种源幼苗生长及生理测定结果表明，适应性由强到弱排序为ZY＞LL＞BC＞YD＞SB。不同种源高山栲幼苗在同一环境中生长，其生理、生化指标差异显著，结合生长和生理指标分析，高山栲苗期在种源选取方面可优先考虑镇沅种源。 |
| 英文摘要: |
| Taking Castanopsis delavayi seedlings from different provenances as the research object, the environmental adaptability of seedlings of different provenances was explored through the determination of stress resistance indexes, and provenances with strong resistance to stress were screened out. The five provenances were placed in the same environment to measure the plant height, ground diameter, crown width and other growth indicators, as well as malondialdehyde (MDA), catalase (CAT), superoxide dismutase (SOD), and peroxidase (POD) and other physiological and biochemical indicators such as protective enzyme activity and net photosynthetic rate, stomatal conductance, intercellular CO2, transpiration rate, and light response. There were significant differences in the growth and physiological characteristics of Castanopsis delavayi seedlings from different provenances (P＜0.05). The plant height and crown growth of Castanopsis delavayi seedlings from Zhenyuan provenance were the highest, indicating that the Zhenyuan provenance showed better environmental adaptability and its MDA content was the lowest, and its SOD and POD activities were the highest, which indicated that the cell membrane of Zhenyuan provenance was less damaged and had strong stress resistance; the photosynthetic effective radiation intensity reached the light saturation point within 400-800 μmol/（m2·s）, and the net photosynthetic rate of Zhenyuan and Longling provenances under the same light intensity was large, and the light suitability was strong. The comprehensive analysis of growth and physiological determination results showed that the order of adaptability from strong to weak was ZY>LL>BC>YD>SB. The physiological and biochemical indicators of Castanopsis delavayi seedlings from different sources in the same environment differed significantly. Based on the analysis of growth and physiological indicators, the Zhenyuan provenance can be given priority in the selection of seed sources during the seedling stage of Castanopsis delavayi. |
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