小叶黄杨越冬叶片呈色及其温光影响因子

doi:10.11707/j.1001-7488.20210206

Abstract

Abstract:

Objective: In this study, the influence of temperature and light on leaf coloration of three cultivars of Buxus mircophylla during overwintering was studied. The threshold value of the temperature and light on B. mircophylla leaf reddening in winter was explored. This study aims to provide a theoretical basis for the application of evergreen broad-leaved plants in witer and the promotion of green landscape in northern China. Method: From 2011 to 2013, the temperature of the three cultivars of B. mircophylla and the illumination conditions of the leaves under five different shading treatments were monitored in two consecutive overwintering and regreening periods (from October of the first year to March of the following year). Meanwhile, the redness index and anatomical structure of leaves were observed dynamically during the periods. Correlation analysis and linear fitting were used to investigate the relationship between the temperature, light and the leaf coloration of the Buxus mircophylla during overwintering. Result: The three cultivars appeared different leaf coloration in winter, among which 'Greenbeauty' maintained the best greening effect, 'Sunnyside' performed a moderate redness in winter but retruned green the latest in spring, and 'Wintergreen' turned red seriously in winter but returned green the earliest in spring. The reddening of the wintering leaves of the three cultivars was directly related to temperature changes, and the critical temperature for the leaf reddening on the adaxial side was lower than that on the abaxial side. Among them, the critical temperature for leaf redness of 'Greenbeauty' was the lowest (0.67-1.55 ℃ on the adaxial side and 5.25-7.68 ℃ on the abaxial side), different performances were presented on the adaxial and abaxial sides of 'Sunnyside' and 'Wintergreen'. Among them, the critical temperature of 'Sunnyside' leaves was 4.33-6.42 ℃ on the adaxial side and 8.43-9.41 ℃ on the abaxial side; the critical temperature of 'Wintergreen' leaves was 4.16-4.98 ℃ on the adaxial side and 9.41-10.23 ℃ on the abaxial side. The red index (RI) of the leaves of the three cultivars decreased with the light intensity. Conclusion: The leaf reddening of the three cultivars of B. mircophylla is closely related to the interaction between low temperature and relatively high light during the overwintering. The sunny leaves of three cultivars show differences in leaf coloration, reflecting their different tolerance to low temperature + high light and the sensitivity of the leaves. These results suggest that B. mircophylla should be planted under a sheltered environment which is conducive to maintaining a good green landscape in winter.

Key words: Buxus microphylla, overwintering, leaf coloration, temperature and light, landscape application

CLC Number:

S718.43

Jingen Peng,Xueru Jiang,Lijuan Xie,Yan Liu. Influence of Temperature and Light on Leaf Coloration of Buxus microphylla During Overwintering[J]. Scientia Silvae Sinicae, 2021, 57(2): 49-61.

Figures/Tables 10

Fig.1

Fig.2

Fig.3

Table 1

The leaf redness index (RI) of three cultivars of B. microphylla during the overwintering and regreening period 2011—2012"

品种 Cultivars	处理 Treatments	呈红指数Redness index (RI)
		100% SUL		50%~60% SSUL		30%~40% SSUL		1%~10% SHL
		Ⅰ	Ⅱ	Ⅰ	Ⅱ	Ⅰ	Ⅱ	Ⅰ	Ⅱ
	2011-10-23	0.335±0.004	0.355±0.017	0.334±0.010	0.355±0.007	0.334±0.011	0.354±0.006	0.326±0.016	0.348±0.011
	2011-11-23	0.345±0.009	0.366±0.011	0.344±0.013	0.362±0.007	0.341±0.011	0.364±0.010	0.328±0.007	0.355±0.012
‘绿美’	2011-12-23	0.355±0.017	0.375±0.012	0.349±0.011	0.367±0.007	0.346±0.010	0.367±0.012	0.331±0.013	0.359±0.02
‘Greenbeauty’	2012-01-28	0.357±0.015	0.382±0.010	0.351±0.012	0.375±0.013	0.347±0.010	0.370±0.010	0.332±0.009	0.359±0.018
	2012-02-23	0.355±0.008	0.381±0.008	0.349±0.011	0.374±0.011	0.344±0.011	0.371±0.010	0.331±0.009	0.358±0.014
	2012-03-23	0.345±0.012	0.372±0.012	0.342±0.011	0.364±0.010	0.340±0.011	0.361±0.011	0.330±0.009	0.359±0.009

	2011-10-23	0.313±0.012	0.361±0.015	0.310±0.015	0.358±0.012	0.310±0.012	0.357±0.009	0.305±0.007	0.340±0.013
	2011-11-23	0.361±0.012	0.385±0.013	0.332±0.010	0.376±0.012	0.330±0.013	0.366±0.012	0.313±0.015	0.345±0.010
‘阳光’	2011-12-23	0.373±0.011	0.396±0.012	0.363±0.013	0.379±0.016	0.356±0.006	0.371±0.006	0.317±0.013	0.350±0.012
‘Sunnyside’	2012-01-28	0.377±0.015	0.398±0.021	0.365±0.012	0.387±0.011	0.360±0.010	0.376±0.008	0.321±0.012	0.352±0.013
	2012-02-23	0.373±0.008	0.395±0.013	0.356±0.013	0.384±0.013	0.352±0.015	0.363±0.014	0.320±0.008	0.351±0.015
	2012-03-23	0.349±0.013	0.367±0.016	0.342±0.016	0.360±0.011	0.337±0.009	0.355±0.014	0.320±0.015	0.350±0.012

	2011-10-23	0.321±0.010	0.364±0.015	0.320±0.005	0.363±0.009	0.320±0.008	0.361±0.008	0.316±0.015	0.343±0.009
	2011-11-23	0.360±0.008	0.392±0.018	0.351±0.012	0.385±0.009	0.349±0.010	0.376±0.011	0.330±0.009	0.350±0.017
‘冬绿’	2011-12-23	0.372±0.011	0.399±0.013	0.360±0.007	0.393±0.012	0.353±0.015	0.378±0.007	0.333±0.018	0.355±0.016
‘Wintergreen’	2012-01-28	0.377±0.008	0.400±0.012	0.370±0.020	0.392±0.007	0.363±0.007	0.379±0.007	0.333±0.014	0.356±0.010
	2012-02-23	0.377±0.010	0.393±0.012	0.370±0.010	0.391±0.008	0.362±0.012	0.376±0.013	0.333±0.009	0.355±0.007
	2012-03-23	0.335±0.008	0.368±0.010	0.333±0.009	0.363±0.011	0.331±0.009	0.357±0.010	0.327±0.012	0.355±0.010

Table 1

Table 2

The leaf redness index (RI) of three cultivars of B. microphylla during the overwintering and regreening period 2012—2013"

品种 Cultivars	处理 Treatments	呈红指数Redness index (RI)
		100% SUL		50%~60% SSUL		30%~40% SSUL		10%~20% SSHL		1%~10% SHL
		Ⅰ	Ⅱ	Ⅰ	Ⅱ	Ⅰ	Ⅱ	Ⅰ	Ⅱ	Ⅰ	Ⅱ
	2012-10-26	0.334±0.008	0.355±0.011	0.334±0.006	0.354±0.008	0.333±0.014	0.353±0.012	0.332±0.007	0.353±0.015	0.330±0.009	0.351±0.008
	2012-11-23	0.345±0.007	0.378±0.008	0.341±0.006	0.373±0.012	0.337±0.013	0.364±0.011	0.333±0.011	0.359±0.010	0.332±0.015	0.354±0.009
‘绿美’	2012-12-23	0.358±0.020	0.381±0.010	0.347±0.007	0.375±0.006	0.344±0.011	0.367±0.006	0.336±0.010	0.361±0.014	0.332±0.012	0.357±0.011
‘Greenbeauty’	2013-01-22	0.358±0.016	0.384±0.006	0.350±0.013	0.379±0.015	0.345±0.011	0.369±0.011	0.335±0.011	0.362±0.010	0.333±0.006	0.357±0.011
	2013-02-23	0.353±0.014	0.382±0.009	0.346±0.011	0.373±0.008	0.341±0.007	0.367±0.016	0.334±0.007	0.361±0.009	0.332±0.010	0.358±0.004
	2013-03-24	0.345±0.007	0.362±0.009	0.338±0.010	0.361±0.014	0.334±0.007	0.360±0.011	0.333±0.009	0.359±0.012	0.331±0.006	0.357±0.007

	2012-10-26	0.341±0.007	0.363±0.015	0.341±0.006	0.362±0.006	0.339±0.008	0.361±0.015	0.338±0.016	0.360±0.007	0.331±0.010	0.357±0.007
	2012-11-23	0.367±0.015	0.388±0.007	0.354±0.008	0.384±0.012	0.350±0.008	0.380±0.016	0.343±0.014	0.374±0.009	0.335±0.010	0.358±0.008
‘阳光’	2012-12-23	0.380±0.007	0.398±0.011	0.362±0.007	0.391±0.004	0.355±0.006	0.384±0.013	0.343±0.017	0.380±0.009	0.335±0.011	0.359±0.008
‘Sunnyside’	2013-01-22	0.376±0.011	0.400±0.004	0.365±0.007	0.393±0.010	0.352±0.007	0.385±0.008	0.341±0.006	0.378±0.010	0.334±0.013	0.361±0.012
	2013-02-23	0.37±0.011	0.396±0.007	0.355±0.015	0.390±0.007	0.348±0.009	0.380±0.007	0.340±0.016	0.373±0.010	0.333±0.010	0.360±0.003
	2013-03-24	0.349±0.011	0.368±0.010	0.338±0.011	0.366±0.012	0.332±0.007	0.360±0.015	0.333±0.012	0.359±0.009	0.333±0.014	0.359±0.008

	2012-10-26	0.335±0.011	0.364±0.008	0.334±0.012	0.363±0.012	0.334±0.011	0.363±0.006	0.332±0.010	0.363±0.014	0.329±0.007	0.351±0.011
	2012-11-23	0.358±0.010	0.395±0.010	0.350±0.012	0.392±0.008	0.344±0.010	0.388±0.017	0.342±0.012	0.370±0.011	0.331±0.006	0.351±0.010
‘冬绿’	2012-12-23	0.374±0.003	0.403±0.015	0.365±0.012	0.401±0.006	0.357±0.008	0.389±0.009	0.350±0.011	0.380±0.010	0.334±0.011	0.354±0.011
‘Wintergreen’	2013-01-22	0.380±0.011	0.406±0.014	0.372±0.007	0.400±0.009	0.360±0.012	0.390±0.006	0.351±0.010	0.378±0.014	0.336±0.009	0.359±0.012
	2013-02-23	0.379±0.013	0.399±0.009	0.371±0.009	0.395±0.011	0.360±0.007	0.382±0.008	0.350±0.011	0.375±0.009	0.333±0.010	0.358±0.011
	2013-03-24	0.347±0.015	0.373±0.009	0.344±0.006	0.359±0.005	0.341±0.009	0.358±0.010	0.332±0.010	0.356±0.014	0.329±0.009	0.356±0.014

Table 2

Table 3

Table 4

Table 5

Table 6

Fig.4

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观测年份 Year	处理 Treatments	100% SUL		50%~60% SSUL		30%~40% SSUL		10%~20% SSUL		1%~10% SHL
观测年份 Year	处理 Treatments	Ⅰ	Ⅱ	Ⅰ	Ⅱ	Ⅰ	Ⅱ	Ⅰ	Ⅱ	Ⅰ	Ⅱ
2011—2012	‘绿美’‘Greenbeauty’	0.907^***	0.926^***	0.958^***	0.785^***	0.979^***	0.727^***	—	—	0.741^***	0.700^***
	‘阳光’‘Sunnyside’	0.947^***	0.902^***	0.852^***	0.841^***	0.870^***	0.745^***	—	—	0.580^**	0.701^***
	‘冬绿’‘Wintergreen’	0.899^***	0.887^***	0.879^***	0.805^***	0.888^***	0.719^***	—	—	0.901^***	0.671^**
2012—2013	‘绿美’‘Greenbeauty’	0.963^***	0.854^***	0.904^***	0.849^***	0.863^***	0.917^***	0.910^***	0.906^***	0.833^***	0.591^**
	‘阳光’‘Sunnyside’	0.935^***	0.882^***	0.785^***	0.863^***	0.593^**	0.765^***	0.354^*	0.799^***	0.570^**	0.573^**
	‘冬绿’‘Wintergreen’	0.889^***	0.884^***	0.852^***	0.766^***	0.865^***	0.658^**	0.853^***	0.715^***	0.772^***	0.378^*

观测年份 Year	处理 Treatments	100% SUL		50%~60% SSUL		30%~40% SSUL		10%~20% SSUL		1%~10% SHL
观测年份 Year	处理 Treatments	Ⅰ	Ⅱ	Ⅰ	Ⅱ	Ⅰ	Ⅱ	Ⅰ	Ⅱ	Ⅰ	Ⅱ
2011—2012	‘绿美’‘Green beauty’	0.037	0.064	0.040	0.196	0.020	0.276	—	—	0.188	0.266
	‘阳光’‘Sunnyside’	0.031	0.013	0.072	0.007	0.072	0.112	—	—	0.444^*	0.284
	‘冬绿’‘Wintergreen’	0.001	0.051	0.004	0.070	0.005	0.144	—	—	0.040	0.304
2012—2013	‘绿美’‘Green beauty’	0.301	0.430^*	0.336^*	0.511^**	0.469^*	0.298	0.409^*	0.201	0.524^*	0.000
	‘阳光’‘Sunnyside’	0.551^**	0.485^*	0.706^***	0.480^*	0.779^***	0.635^**	0.719^***	0.722^***	0.630^**	0.033
	‘冬绿’‘Wintergreen’	0.671^**	0.507^**	0.229	0.609^**	0.212	0.729^***	0.449^*	0.591^**	0.435^*	0.002

观测年份 Year	处理 Treatments	‘绿美’ ‘Greenbeauty’		‘阳光’ ‘Sunnyside’		‘冬绿’ ‘Wintergreen’
观测年份 Year	处理 Treatments	回归方程 Regression equation	变红临界值 Red critical value	回归方程 Regression equation	变红临界值 Red critical value	回归方程 Regression equation	变红临界值 Red critical value
2011—2012	100% SUL-叶片近轴侧Leaf adaxial side	y=-698.25x + 245.94	1.55	y=-249.82x + 91.771	4.33	y=-248x + 90.958	4.16
2011—2012	100% SUL-叶片远轴侧Leaf abanial side	y=-586.9x + 221.9	7.68	y=-372.62x + 145.42	9.41	y=-373.96x + 146.73	10.23
2012—2013	100% SUL-叶片近轴侧Leaf adaxial side	y=-647.26x + 227.21	0.67	y=-368.24x + 135.3	6.42	y=-304.54x + 111.57	4.98
2012—2013	100% SUL-叶片远轴侧Leaf abanial side	y=-226.7x + 93.766	5.25	y=-138.35x + 63.259	8.43	y=-162.44x + 72.42	9.41

观测年份 Year	处理 Treatments	‘绿美’ ‘Greenbeauty’		‘阳光’ ‘Sunnyside’		‘冬绿’ ‘Wintergreen’
观测年份 Year	处理 Treatments	回归方程 Regression equation	变红临界值 Red critical value	回归方程 Regression equation	变红临界值 Red critical value	回归方程 Regression equation	变红临界值 Red critical value
2011—2012	100% SUL-叶片近轴侧Leaf adaxial side	y=40.858x - 4.242 6	10.06	y=12.92x + 5.385 3	9.91	y=-1.681 1x + 10.605	10.02
2011—2012	100% SUL-叶片远轴侧Leaf abanial side	y=44.499x - 6.634 4	9.61	y=-12.715x + 14.884	10.24	y=-25.695x + 19.919	10.54
2012—2013	100% SUL-叶片近轴侧Leaf adaxial side	y=-146.63x + 59.855	8.53	y=-114.59x + 50.372	10.27	y=-157.36x + 65.14	10.06
2012—2013	100% SUL-叶片远轴侧Leaf abanial side	y=-130.16x + 57.316	9.81	y=-104.11x + 48.813	10.81	y=-98.924x + 47.268	11.16

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Influence of Temperature and Light on Leaf Coloration of Buxus microphylla During Overwintering

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