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林业科学 ›› 2023, Vol. 59 ›› Issue (10): 99-112.doi: 10.11707/j.1001-7488.LYKX20230055

• 研究论文 • 上一篇    下一篇

不同砧穗组合楸树嫁接苗的生理生化特性

何荷,贾瑞瑞,付钰,祝艳艳,王良桂,杨秀莲*()   

  1. 南京林业大学风景园林学院 南京 210037
  • 收稿日期:2023-02-12 出版日期:2023-10-25 发布日期:2023-11-01
  • 通讯作者: 杨秀莲 E-mail:.xly@njfu.edu.cn
  • 基金资助:
    江苏省农业科技自主创新资金项目(CX(19) 2038);江苏高校优势学科建设工程资助项目(PAPD)

Physiological and Biochemical Traits of Grafted Seedlings of Catalpa bungei with Various Combinations of Rootstocks and Scions

He He,Ruirui Jia,Yu Fu,Yanyan Zhu,Lianggui Wang,Xiulian Yang*()   

  1. College of Landscape Architecture, Nanjing Forestry University Nanjing 210037
  • Received:2023-02-12 Online:2023-10-25 Published:2023-11-01
  • Contact: Xiulian Yang E-mail:.xly@njfu.edu.cn

摘要:

目的: 分析比较不同砧穗组合间生理指标的差异,为楸树嫁接砧穗组合的选择及亲和性、生长状况的评价提供参考依据。方法: 以‘南林1号’、‘洛楸’、‘苏楸1号’为接穗,梓树、滇楸为砧木进行嫁接,测定各嫁接组合的成活率、渗透调节物质含量、抗氧化酶活性、内源激素含量,对各生理指标进行相关性分析并使用主成分分析法和正交偏最小二乘判别分析法综合评价各嫁接组合。结果: 1) 在6个砧穗组合中,滇楸/‘南林1号’的成活率最高,为76.91%,滇楸/‘苏楸1号’的成活率最低,为32.05%。2) 各嫁接组合的可溶性糖和淀粉含量总体呈先降后升再降的趋势,抗氧化酶活性呈先升后降的趋势,且均在嫁接5个月后达到最大值,而内源激素含量总体在嫁接4个月后达到最大值。3) 在整个测量期,除以‘苏楸1号’为接穗的嫁接组合外,滇砧嫁接组合的可溶性糖含量、淀粉含量、超氧化物歧化酶(SOD)活性、多酚氧化酶(PPO)活性、脱落酸(ABA)含量等均在不同程度上大于梓砧嫁接组合。4) 6个砧穗组合的主成分分析综合评价得分由高到低依次为滇楸/‘南林1号’>梓树/‘南林1号’>梓树/‘苏楸1号’>滇楸/‘洛楸’>梓树/‘洛楸’>滇楸/‘苏楸1号’。结论: 滇楸适合作为‘南林1号’和‘洛楸’的砧木,梓树适合作为‘苏楸1号’的砧木。在6个砧穗组合中,滇楸/‘南林1号’综合表现最佳,滇楸/‘苏楸1号‘综合表现最差。超氧化物歧化酶(SOD)活性、多酚氧化酶(PPO)活性、生长素(IAA)含量、脱落酸(ABA)含量可以作为反映楸树嫁接植株亲和性和生长状况的主要生理指标。

关键词: 楸树, 嫁接, 砧穗组合, 生理生化特性, 多元统计分析

Abstract:

Objective: This study aims to compare and analyze the differences in physiological indicators among different combinations of rootstocks and scions of Catalpa bungei, so as to provide a reference basis for the selection of rootstock and scion combinations and the evaluation of their affinity and growth status. Method: The grafting was carried out with Catalpa bungei ‘Nanlin No.1’, Catalpa bungei ‘Luoqiu’ and Catalpa bungei ‘Suqiu No.1’ as scions, and Catalpa ovata and Catalpa fargesii as rootstocks, and the survival rate, osmoregulatory substance content, antioxidant enzyme activity, endogenous hormone content of each grafting combination were determined. Correlation analysis was conducted on various physiological indicators, and the principal component analysis and orthogonal partial least squares discriminant analysis were used to comprehensively evaluate each grafting combination. Result: 1) The survival rate of the C. fargesii/C. bungei ‘Nanlin No.1’ combination was the greatest among the six rootstock and scion combinations, reaching up to 76.91%, and the survival rate of the C. fargesii/C. bungei ‘Suqiu No.1’ combination was the lowest, as low as 32.05%. 2) The soluble sugar and starch contents of each grafting combination showed a general trend of decreasing, then increasing and then decreasing, and the antioxidant enzyme activities showed a trend of increasing and then decreasing, and all of them reached the maximum after 5 months of grafting. However, the endogenous hormone contents reached the maximum after 4 months of grafting in general. 3) Throughout the measurement period, the soluble sugar content, starch content, superoxide dismutase (SOD) activity, polyphenol oxidase (PPO) activity, and abscisic acid (ABA) content of C. fargesii rootstock grafting combinations were all to varying degrees greater than those of C. ovata rootstock grafting combinations, except for the grafting combination with C. bungei ‘Suqiu No.1’ as the scion. 4) The overall evaluation scores of the six combinations were as follows: C. fargesii/C. bungei ‘Nanlin No.1’ > C. ovata/C. bungei ‘Nanlin No.1’ > C. ovata/C. bungei ‘Suqiu No.1’ > C. fargesii/C. bungei ‘Luoqiu’ > C. ovata/C. bungei ‘Luoqiu’ > C. fargesii/C. bungei ‘Suqiu No.1’. Conclusion: C. fargesii is suitable as rootstock for C. bungei ‘Nanlin No.1’ and C. bungei ‘Luoqiu’, and C. ovata is suitable as rootstock for C. bungei ‘Suqiu No.1’. Among the six combinations, C. fargesii/C. bungei ‘Nanlin No.1’ has the best-combined performance and C. fargesii/C. bungei ‘Suqiu No.1’ has the worst-combined performance. Superoxide dismutase (SOD) activity, polyphenol oxidase (PPO) activity, auxin (IAA) content, and abscisic acid (ABA) content can be used as the main physiological indicators to reflect the affinity and growth status of grafted plants of C. bungei.

Key words: Catalpa bungei, grafting, rootstock and scion combination, physiological and biochemical characteristics, multivariate statistical analysis

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