Effects of gibberellin on early growth and fruiting of potted Betula platyphylla clones

doi:10.3969/j.issn.1000-2006.201902029

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2019, Vol. 43 ›› Issue (5): 16-22.doi: 10.3969/j.issn.1000-2006.201902029

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Effects of gibberellin on early growth and fruiting of potted Betula platyphylla clones

WANG Chu(), GU Chenrui, JIANG Jing, LIU Guifeng^*()

State Key Laboratory of Tree Genetics and Breeding(Northeast Forestry University), Harbin 150040, China

Received:2019-02-27 Revised:2019-09-08 Online:2019-10-08 Published:2019-10-08
Contact: LIU Guifeng E-mail:wangchu1226@163.com;liuguifeng@126.com

Abstract

Abstract:

【Objective】 This study aimed to identify the best gibberellin treatment to increase the growth and fruiting ofBetula platyphylla. 【Method】 In this experiment, a birch clone was used as the research object and the ramets were treated with GA₃ and GA₄₊₇ at concentrations of 0.0, 0.2, 0.4 and 0.6 g/L. The test lasted for 3 years. In the second year, the rhythmicity of growth height was investigated. In the third year, the growth height, breast diameter, number of infructescences, fresh weight of infructescences and dry weight of seeds under each treatment were investigated. 【Result】 Analysis of variances of growth height, diameter at breast height, and fruit-bearing amount showed that the differences in growth height and fruit-bearing amount were significantly higher at different concentrations of GA₃ and GA₄₊₇(P < 0.01). Both GA ₃ and GA₄₊₇ can promote the growth and fruiting of B. platyphylla; however, the effect of GA₄₊₇ is better. The optimal concentration was determined to be 0.4 g/L by comprehensive evaluation of growth height and fruit-bearing amount. Under this treatment, the growth height 13.69% was higher than that under the control, and the number of infructescences, fresh weight of infructescences, and dry weight of seeds increased by 203.6%, 186.8% and 187.2%, respectively. The growth height curve of B. platyphylla under each treatment accords with the “S” curve model. The fitting coefficients of the logistic equation under each treatment were all higher than 0.99. According to the parameters of the tree height growth model, the reason that gibberellin promotes the growth of B. platyphylla is mainly due to the prolongation of the fast growth period. 【Conclusion】 Both GA₄₊₇ and GA₃ promoted the growth and fruiting of B. platyphylla. GA₄₊₇ was more efficacious than GA₃. GA₄₊₇ at 0.4 g/L is the best concentration and hormone to promote the growth of B. platyphylla.

Key words: gibberellin, Betula platyphylla, early growth, fruiting, tree height

CLC Number:

S792.153

WANG Chu, GU Chenrui, JIANG Jing, LIU Guifeng. Effects of gibberellin on early growth and fruiting of potted Betula platyphylla clones[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2019, 43(5): 16-22.

Figures/Tables 6

Table 1

Table 2

Table 3

Table 4

Fig.1

Table 5

References 27

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性状 traits	差异来源 source of difference	离差平方和 SS	自由度 df	均方 MS	方差分量 variance component	方差分量比例/% percentage of variance component	F	P
树高/cm growth height	组间	145 064.243	8	18 133.030	988.150	74.05	52.357^**	<0.001
	组内	54 374.462	155	346.334	346.334	25.95
	总数	199 438.705	163		1 334.484	100.00
胸径/cm diameter of height	组间	1.670	8	0.209	0.004	3.20	1.597	0.130
	组内	20.522	155	0.131	0.131	96.80
	总数	22.192	163		0.135	100.00
单株果序数量/个 numbers of infructescence per ramet	组间	207 897.275	8	25 987.159	1 056.929	13.18	3.732^**	0.001
	组内	1 009 552.309	155	6 962.430	6 962.430	86.82
	总数	1 217 449.584	163		8 019.359	100.00
单株果序鲜质量/g fresh weight of infructescence per ramet	组间	79 064.434	8	9 883.054	384.445	11.48	3.335^**	0.002
	组内	429 640.755	155	2 963.040	2 963.040	88.52
	总数	508 705.189	163		3 347.485	100.00
单株种子干质量/g dry weight of seeds per ramet	组间	4 330.217	8	541.277	21.450	12.14	3.488^**	0.001
	组内	22 501.828	155	155.185	155.185	87.86
	总数	26 832.045	163		176.635	100.00

处理 treatment	树高/cm growth height	单株果序数量 number of infructescence per ramet	单株果序鲜质量/g fresh weight of infructescence per ramet	单株种子干质量/g dry weight of seeds per ramet
T1	491.33±25.32 e	55±8.43 c	38.38±6.75 c	8.38±1.54 c
T2	485.00±20.00 e	70±17.45 c	50.18±12.24 bc	9.68±2.45 c
T3	538.42±15.82 cd	73±14.34 c	48.02±10.11 bc	10.70±2.45 bc
T4	558.61±13.37 ab	167±23.92 a	110.07±17.07 a	24.07±4.19 a
T5	566.25±13.48 a	137±34.37 ab	85.29±21.31 ab	19.27±5.47 ab
T6	494.38±16.72 e	57±9.60 c	42.90±7.76 bc	8.81±1.47 c
T7	529.44±15.52 d	70±18.36 c	43.58±10.94 bc	8.14±2.02 c
T8	547.06±15.72 bc	67±17.63 c	46.69±12.80 bc	8.53±2.56 c
T9	551.88±15.15 b	106±30.60 bc	67.36±16.70 bc	13.15±3.56 bc

处理 treatment	树高实测值/cm growth height measured value	R²	方程参数equation parameter
处理 treatment	树高实测值/cm growth height measured value	R²	a	b	t₀	c
T₁	126.06±23.91 e	0.991 2	34.65	125.02	169	8.33
T₂	139.25±20.75 d	0.992 2	36.91	143.29	171	8.01
T₃	174.82±10.73 c	0.998 6	26.84	177.64	165	6.96
T₄	194.56±10.90 ab	0.999 0	28.64	198.51	170	6.75
T₅	201.50±5.99 a	0.998 6	33.06	211.09	178	6.80
T₆	139.63±20.04 d	0.995 9	35.83	140.60	170	8.61
T₇	185.00±11.92 bc	0.999 2	29.88	193.28	172	6.14
T₈	200.50±11.76 a	0.999 6	31.35	206.56	174	6.67
T₉	203.45±13.34 a	0.999 2	32.44	213.07	179	6.47

处理 treatment	速生点/ d fastest growing day	速生点处生长速度/ (cm·d^-1) growing speed at the fastest growing day	速生期参数fast-growing parameter
处理 treatment	速生点/ d fastest growing day		起始时间/d start date	结束时间/d end date	持续时间/d duration	生长量/ cm growth amount	日生长量/ (cm·d^-1) daily growth amount	生长量占年生长量比值/% growth ratio of the to annual growth
T₁	164 b	1.130	137 a	190 b	53 b	52.245 d	0.986	54.279
T₂	171 ab	1.616	140 a	194 ab	54 b	61.425 d	1.422	55.337
T₃	165 b	1.786	131 ab	190 b	60 ab	73.488 c	1.565	56.848
T₄	170 ab	1.755	133 ab	194 ab	63 a	94.475 ab	1.520	57.096
T₅	169 ab	1.747	135 ab	202 ab	67 a	97.558 ab	1.771	57.370
T₆	170 ab	2.113	139 a	191 b	52 b	58.628 d	1.866	56.512
T₇	170 ab	1.600	130 ab	196 ab	65 a	88.906 b	1.403	56.107
T₈	174 a	1.770	133 ab	198 a	65 a	99.129 a	1.548	56.032
T₉	177 a	1.825	135 ab	202 a	67 a	102.558 a	1.597	56.614

Effects of gibberellin on early growth and fruiting of potted Betula platyphylla clones

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赤霉素 gibberellin	编号 No.	质量浓度/(g·L^-1) concentration	处理株数 sample number
对照(CK)	T1	0.0	16
GA₄₊₇	T2	0.0	17
	T3	0.2	19
	T4	0.4	19
	T5	0.6	19
GA₃	T6	0	18
	T7	0.2	19
	T8	0.4	19
	T9	0.6	18