不同砧穗组合楸树嫁接苗的生理生化特性

doi:10.11707/j.1001-7488.LYKX20230055

Abstract

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

CLC Number:

He He,Ruirui Jia,Yu Fu,Yanyan Zhu,Lianggui Wang,Xiulian Yang. Physiological and Biochemical Traits of Grafted Seedlings of Catalpa bungei with Various Combinations of Rootstocks and Scions[J]. Scientia Silvae Sinicae, 2023, 59(10): 99-112.

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序号 Order	砧木 Stock	接穗 Scion	文中简称 Abbreviation in the text
1	梓树Catalpa ovata（Z）	‘南林1号’Catalpa bungei ‘Nanlin No.1’（N）	ZN
2		‘洛楸’Catalpa bungei ‘Luoqiu’（L）	ZL
3		‘苏楸1号’Catalpa bungei ‘Suqiu No.1’（S）	ZS
4	滇楸Catalpa fargesii f. duclouxii（D）	‘南林1号’Catalpa bungei ‘Nanlin No.1’（N）	DN
5		‘洛楸’Catalpa bungei ‘Luoqiu’（L）	DL
6		‘苏楸1号’（S）Catalpa bungei ‘Suqiu No.1’（S）	DS

嫁接组合 Grafting combination	砧木 Stock	接穗 Scion	成活率 Survival rate (%)
ZN	梓树Catalpa ovata（Z）	‘南林1号’ Catalpa bungei ‘Nanlin No.1’（N）	59.08±0.036c
DN	滇楸Catalpa fargesii f. duclouxii（D）	‘南林1号’ Catalpa bungei ‘Nanlin No.1’（N）	76.91±0.027a
ZL	梓树Catalpa ovata（Z）	‘洛楸’ Catalpa bungei ‘Luoqiu’（L）	72.35±0.025b
DL	滇楸Catalpa fargesii f. duclouxii（D）	‘洛楸’ Catalpa bungei ‘Luoqiu’（L）	73.22±0.049b
ZS	梓树Catalpa ovata（Z）	‘苏楸1号’ Catalpa bungei ‘Suqiu No.1’（S）	60.95±0.064c
DS	滇楸Catalpa fargesii f. duclouxii（D）	‘苏楸1号’ Catalpa bungei ‘Suqiu No.1’（S）	32.05±0.038d

项目 Projects		第1主成分 Principal component 1	第2主成分 Principal component 2	第3主成分 Principal component 3	第4主成分 Principal component 4
特征值 Eigenvalue		3.840	3.470	1.433	1.088
方差贡献率 Variance contribution (%)		34.910	31.545	13.026	9.887
累计贡献率 Cumulative percentage (%)		34.910	66.456	79.481	89.368
因子载荷 Load	糖Sugar	0.436	?0.641	0.038	0.534
	淀粉Starch	0.865	0.367	?0.051	?0.189
	蛋白质Protein	?0.342	0.212	0.711	0.354
	超氧化物歧化酶SOD	0.823	0.430	0.178	0.273
	过氧化物酶POD	0.875	0.033	0.396	0.027
	过氧化氢酶CAT	?0.104	0.829	0.339	0.008
	多酚氧化酶PPO	0.596	0.739	0.018	?0.068
	生长素IAA	0.729	?0.381	?0.440	0.171
	脱落酸ABA	0.023	0.810	?0.362	?0.251
	赤霉素GA₃	?0.660	0.612	?0.137	0.349
	玉米素核苷ZR	?0.076	0.535	?0.526	0.590

嫁接组合 Stock-scion combination	各公因子得分 Score of each common factor				综合得分 Comprehensive score	排序 Order
嫁接组合 Stock-scion combination	Y1	Y2	Y3	Y4	综合得分 Comprehensive score	排序 Order
ZN	0.326 026	0.409 015	?0.134 540	?0.018 99	0.581 511	2
DN	0.979 263	0.616 733	?0.009 420	?0.082 41	1.504 167	1
ZL	?0.903 250	0.060 637	0.185 514	?0.114 05	?0.771 150	5
DL	?0.773 430	0.599 674	?0.034 810	0.1581 43	?0.050 430	4
ZS	0.778 384	?0.718 250	0.188 854	0.114 83	0.363 813	3
DS	?0.406 990	?0.967 800	?0.195 600	?0.057 51	?1.627 910	6

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

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