Variations in physiological characteristics of rootstock-scion and its relationship to graft compatibility during the grafting union process of Cyclocarya paliurus

doi:10.12302/j.issn.1000-2006.202010024

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2021, Vol. 45 ›› Issue (1): 13-20.doi: 10.12302/j.issn.1000-2006.202010024

Special Issue: 青钱柳培育与选优专题

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Variations in physiological characteristics of rootstock-scion and its relationship to graft compatibility during the grafting union process of Cyclocarya paliurus

LI Na¹(), ZHU Peilin², FENG Cai¹, WEN Minxue³, FANG Shengzuo¹, SHANG Xulan¹^,^*()

1. College of Forestry, Co-Innovation center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
2. Jiangxi Academy of Forestry, Nanchang 330032, China
3. Jiangxi Yisen Industrial Co.LTD, Yichun 336000, China

Received:2020-10-17 Accepted:2020-11-15 Online:2021-01-30 Published:2021-02-01
Contact: SHANG Xulan E-mail:1519811872@qq.com;shangxulan@njfu.edu.cn

Abstract

Abstract:

【Objective】 Variations in physiological indexes between scions and rootstocks of different grafting combinations were analyzed in Cyclocarya paliurus, and the relationship between the physiological characteristics of rootstocks and grafting survival was studied. This will allow the early prediction of grafting compatibility of rootstock-scion and the selection of C. paliurus stock. 【Method】 Three grafting combinations were designed, with Pterocarya stenoptera, Carya illinoinensis and C. paliurus as rootstocks to graft C. paliurus (as scions). The contents of soluble sugar, soluble protein, starch and tannin, peroxidase (POD) and polyphenol oxidase (PPO) activity in rootstocks and scions of the grafting combinations were measured at 0, 40 and 70 days after grafting, respectively, while the grafting survival was determined at 70 days after grafting. 【Result】 The graft survival rate with C. paliurus as the rootstock was 53.49%, which was significantly higher than that of the P. stenoptera and C. illinoinensis grafting combinations. With the increase in time after grafting, soluble sugar and starch in the rootstock-scion initially decreased and then rose. The tannin content increased initially and then decreased, and the higher content of tannin in the rootstock-scion was not conducive to the survival of grafting. The increase in POD activity was beneficial for improving the defense response of affinity grafts, while a high PPO activity was not conducive to the survival of grafting. The correlation analysis showed that the soluble sugar, starch, tannin content, and PPO activity of stocks measured at 40 days were significantly negatively correlated with the graft survival rate (P <0.05), while POD activity was significantly positively correlated with the graft survival rate (P <0.05). The soluble sugar, tannin content, and PPO activity of the stocks measured at 70 days were significantly negatively correlated with the graft survival rate (P <0.05), but the POD activity of the scion was significantly positively correlated with the graft survival rate (P <0.01). The absolute value of the PPO activity difference between the scion and rootstock showed a significant negative correlation with the graft survival rate at 40 days (P <0.05), while the absolute value of the POD activity difference at 70 days showed a very significant negative correlation with the graft survival rate (P <0.01). 【Conclusion】 The graft compatibility was strong using C. paliurus as a grafting stock, while the grafting compatibility was weak when P. stenoptera and C. illinoensis were used as rootstocks. The content of soluble sugar, starch, tannin content, POD and PPO activity, and the absolute value of POD and PPO activity can be used as physiological indicators for the early evaluation of the grafting compatibility of rootstock and scion.

Key words: Cyclocarya paliurus, rootstock, grafting combination, survival rate, enzyme activity

CLC Number:

S722

LI Na, ZHU Peilin, FENG Cai, WEN Minxue, FANG Shengzuo, SHANG Xulan. Variations in physiological characteristics of rootstock-scion and its relationship to graft compatibility during the grafting union process of Cyclocarya paliurus[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2021, 45(1): 13-20.

Figures/Tables 5

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类别 item	取样时间/d sampling time		可溶性糖质量分数/% soluble sugar content						可溶性蛋白质量分数/% soluble protein content
类别 item	取样时间/d sampling time		QQ		QF		QB		QQ		QF	QB
接穗 scion	0	1.89±0.08 b		1.79±0.09 b		1.90±0.14 b^*		4.54±0.29 b		4.54±0.24 b		4.54±0.41 b
	40	1.27±0.07 c^*		1.64±0.07 b		1.81±0.06 b^*		5.48±0.27 a^*		5.53±0.32 a		5.44±0.29 a
	70	2.20±0.07 a		2.43±0.10 a		3.42±0.15 a		5.63±0.27 a		5.67±0.18 a		6.05±0.38 a
砧木 rootstock	0	1.89±0.08 b		1.59±0.08 c		1.30±0.08 c		4.54±0.29 c		4.30±0.30 b		4.25±0.23 b
	40	1.59±0.06 c		1.74±0.08 b		2.36±0.14 b		6.46±0.30 a		5.58±0.23 a		6.00±0.41 a
	70	2.14±0.11 a		2.51±0.12 a		3.56±0.14 a		5.65±0.28 b		5.42±0.34 a		5.74±0.20 a

类别 item	取样时间/d sampling time		淀粉质量分数/% starch content						单宁质量分数/% tannin content
类别 item	取样时间/d sampling time		QQ		QF		QB		QQ		QF	QB
接穗 scion	0	1.39±0.07 b		1.39±0.07 c^*		1.39±0.08 b^*		1.60±0.24 b		1.46±0.11 c		1.62±0.13 b
	40	1.05±0.07 c		1.53±0.09 b		1.77±0.08 a^*		2.10±0.20 a		2.68±0.21 a		2.93±0.25 a^*
	70	1.81±0.11 a^*		1.78±0.06 a^*		1.85±0.11 a^*		1.77±0.18 ab		2.24±0.23 b^*		2.72±0.25 a
砧木 rootstock	0	1.39±0.07 b		1.63±0.08 b		2.43±0.10 b		1.65±0.20 b		1.40±0.15 b		1.80±0.09 c
	40	1.03±0.11 c		1.57±0.10 b		2.12±0.17 c		2.26±0.20 a		2.78±0.15 a		3.60±0.22 a
	70	2.52±0.09 a		2.40±0.10 a		3.55±0.05 a		1.97±0.16 ab		2.68±0.14 a		3.05±0.25 b

类别 item	取样时间/d sampling time		POD活性/(U·g^-1) POD activity						PPO活性/(U·g^-1) PPO activity
类别 item	取样时间/d sampling time		QQ		QF		QB		QQ		QF	QB
接穗 scion	0	36.40±3.31 b		36.06±2.83 b^*		36.40±1.75 b^*		10.55±0.65 b		10.55±0.84 c		10.55±0.74 c
	40	112.60 ±5.85 a^*		86.20±3.53 a^*		65.80±0.21 a^*		6.95±0.63 c		19.10±1.64 b		17.20±1.55 b^*
	70	31.00±3.08 b		22.40±1.50 c^*		15.50±1.15 c^*		17.10±175 a		22.25±1.81 a		25.15±1.90 a
砧木 rootstock	0	36.40±3.31 b		101.30±4.17 b		120.80±3.50 b		10.55±0.65 b		10.60±0.87 c		11.50±1.05 b
	40	174.80 ±3.89 a		117.50±3.20 a		140.20±0.60 a		7.85±0.79 c		16.10±1.55 b		21.65±1.17 a
	70	34.30±2.55 b		30.30±2.20 c		35.10±2.26 c		14.10±1.66 a		20.25±1.85 a		24.20±1.77 a

取样时间/d sampling time	因子 factors	可溶性糖含量 soluble sugar content	可溶性蛋白含量 soluble protein content	淀粉含量 starch content	单宁含量 tannin content	POD活性 POD activity	PPO活性 PPO activity
40	接穗	-0.812^**	0.426	-0.900^**	-0.844^**	0.864^**	-0.850^**
	砧木	-0.743^*	0.492	-0.848^**	-0.883^**	0.686^*	-0.900^**
	\|接穗指标-砧木指标\|	-0.052	0.184	-0.620	0.510	-0.381	-0.728^*
70	接穗	-0.724^*	-0.491	-0.142	-0.832^**	0.854^**	-0.846^**
	砧木	-0.789^*	-0.110	-0.561	-0.883^**	0.027	-0.867^**
	\|接穗指标-砧木指标\|	-0.368	-0.544	-0.554	-0.196	-0.818^**	0.069

Variations in physiological characteristics of rootstock-scion and its relationship to graft compatibility during the grafting union process of Cyclocarya paliurus

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