Comparison of leaf cost-benefit relationship for five pinnate compound-leaf tree species in temperate forests of northeast China

doi:10.17521/cjpe.2022.0460

Abstract

Abstract:

Aims Explore the allometry between lamina and rachis and clarify the leaf cost-benefit relationship of pinnate compound-leaf temperate tree species.

Methods In the Maoershan Forest Ecosystem Research Station, Heilongjiang Province, the lamina and rachis traits were measured for five pinnate compound-leaf species (Fraxinus mandshurica, Juglans mandshurica, Phellodendron amurense, Maackia amurensisand Aralia elata), and the allometry between lamina and rachis was developed by using the standardized major axis regression.

Important findings There was a significant allometric scaling between lamina area and rachis mass, and the slope was closer to the theoretical value of 3/4 of the West, Brown and Enquist (WBE) model than to the theoretical value of 2/3 of the geometric similarity model. However, there was an isometric relationship between lamina mass and rachis mass in most cases. There were significant allometric relationships between compound-leaf area and rachis length and between lamina mass and rachis length, and the common slopes for all the species were 1.853 and 2.322, respectively. There was a significant allometry between rachis mass and rachis length, with all the allometric exponents being greater than 2, indicating that the increasing rate of spatial expansion benefit achieved by the rachis lengthening was lower than the increasing rate of lamina mass cost. Significant allometric scaling between lamina area and lamina mass and between lamina area and compound-leaf mass indicated a trend of diminishing returns in compound-leaves. The bipinnate compound-leaves of A. elata had a higher carbon return to investment ratio than the pinnate ones of the other species. In summary, the significant allometric scaling between lamina and rachis of the pinnate compound-leaf species suggests rachis elongation helps light acquisition, but the increase in investment cost caused by the rachis elongation limits the expansion of the compound leaf area.

Key words: compound leaf, biomass allocation, leaf size, rachis, allometry

LIU Yan-Jie, LIU Yu-Long, WANG Chuan-Kuan, WANG Xing-Chang. Comparison of leaf cost-benefit relationship for five pinnate compound-leaf tree species in temperate forests of northeast China[J]. Chin J Plant Ecol, 2023, 47(11): 1540-1550.

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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2022.0460

https://www.plant-ecology.com/EN/Y2023/V47/I11/1540

Figures/Tables 7

References 56

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变量 Variable (y-x)	树种 Species	决定系数 Determination coefficient (R²)	斜率 Slope [95% CI]	截距 Intercept [95% CI]
叶片面积-叶轴质量 Lamina area-rachis mass	FM	0.923	0.832^a [0.767, 0.901]	2.888^a [2.844, 2.932]
	JM	0.938	0.841^a [0.783, 0.904]	2.899^a [2.868, 2.930]
	PA	0.801	0.693^b [0.609, 0.789]	2.814^a [2.746, 2.882]
	MA	0.686	0.833^ab [0.708, 0.979]	2.788^a [2.684, 2.893]
	AE	0.946	0.712^b [0.666, 0.762]	2.947^a [2.913, 2.980]
叶片质量-叶轴质量 Lamina mass-rachis mass	FM	0.952	0.994^b [0.933, 1.059]	0.766^a [0.724, 0.808]
	JM	0.967	1.048^a [0.994, 1.104]	0.671^a [0.643, 0.699]
	PA	0.822	0.842^b [0.745, 0.952]	0.655^a [0.577, 0.733]
	MA	0.848	1.044^ab [0.933, 1.169]	0.698^a [0.607, 0.789]
	AE	0.970	0.952^b [0.906, 1.001]	0.209^a [0.176, 0.242]
叶片面积-叶轴长度 Lamina area-rachis length	FM	0.844	1.950^a [1.739, 2.186]	-0.092^b [-0.388, 0.204]
	JM	0.920	1.790^a [1.649, 1.943]	0.027^a [-0.196, 0.251]
	PA	0.703	1.555^a[1.328, 1.820]	0.308^a [-0.012, 0.629]
	MA	0.700	2.004^a[1.710, 2.349]	-0.317^c [-0.715, 0.083]
	AE	0.912	1.919^a[1.761, 2.091]	-0.342^c [-0.656, -0.028]
叶片质量-叶轴长度 Lamina mass-rachis length	FM	0.840	2.320^a[2.067, 2.605]	-2.786^b [-3.139, -2.426]
	JM	0.853	2.232^a [1.999, 2.491]	-2.909^c [-3.286, -2.532]
	PA	0.572	1.887^a[1.563, 2.279]	-2.378^a [-2.853, -1.919]
	MA	0.449	2.509^a [2.026, 3.106]	-3.205^ac [-3.864, -2.515]
	AE	0.837	2.572^a [2.288, 2.890]	-4.206^d [-4.772, -3.626]

变量 Variable (y-x)	树种 Species	决定系数 Determination coefficient (R²)	斜率 Slope [95% CI]	截距 Intercept [95% CI]
叶片面积-叶轴质量 Lamina area-rachis mass	FM	0.923	0.832^a [0.767, 0.901]	2.888^a [2.844, 2.932]
	JM	0.938	0.841^a [0.783, 0.904]	2.899^a [2.868, 2.930]
	PA	0.801	0.693^b [0.609, 0.789]	2.814^a [2.746, 2.882]
	MA	0.686	0.833^ab [0.708, 0.979]	2.788^a [2.684, 2.893]
	AE	0.946	0.712^b [0.666, 0.762]	2.947^a [2.913, 2.980]
叶片质量-叶轴质量 Lamina mass-rachis mass	FM	0.952	0.994^b [0.933, 1.059]	0.766^a [0.724, 0.808]
	JM	0.967	1.048^a [0.994, 1.104]	0.671^a [0.643, 0.699]
	PA	0.822	0.842^b [0.745, 0.952]	0.655^a [0.577, 0.733]
	MA	0.848	1.044^ab [0.933, 1.169]	0.698^a [0.607, 0.789]
	AE	0.970	0.952^b [0.906, 1.001]	0.209^a [0.176, 0.242]
叶片面积-叶轴长度 Lamina area-rachis length	FM	0.844	1.950^a [1.739, 2.186]	-0.092^b [-0.388, 0.204]
	JM	0.920	1.790^a [1.649, 1.943]	0.027^a [-0.196, 0.251]
	PA	0.703	1.555^a[1.328, 1.820]	0.308^a [-0.012, 0.629]
	MA	0.700	2.004^a[1.710, 2.349]	-0.317^c [-0.715, 0.083]
	AE	0.912	1.919^a[1.761, 2.091]	-0.342^c [-0.656, -0.028]
叶片质量-叶轴长度 Lamina mass-rachis length	FM	0.840	2.320^a[2.067, 2.605]	-2.786^b [-3.139, -2.426]
	JM	0.853	2.232^a [1.999, 2.491]	-2.909^c [-3.286, -2.532]
	PA	0.572	1.887^a[1.563, 2.279]	-2.378^a [-2.853, -1.919]
	MA	0.449	2.509^a [2.026, 3.106]	-3.205^ac [-3.864, -2.515]
	AE	0.837	2.572^a [2.288, 2.890]	-4.206^d [-4.772, -3.626]

变量 Variable (y-x)	树种 Species	决定系数 Determination coefficient (R²)	斜率 Slope [95% CI]	截距 Intercept [95% CI]
叶轴质量-叶轴长度 Rachis mass-rachis length	FM	0.912	2.337^ab [2.144, 2.547]	-3.573 [-3.841, -3.305]
	JM	0.910	2.126^b [1.946, 2.324]	-3.413 [-3.701, -3.125]
	PA	0.752	2.243^ab [1.942, 2.590]	-3.614 [-4.036, -3.191]
	MA	0.618	2.401^ab [2.009, 2.870]	-3.721 [-4.256, -3.183]
	AE	0.907	2.696^a [2.468, 2.946]	-4.620 [-5.074, -4.165]

变量 Variable (y-x)	树种 Species	决定系数 Determination coefficient (R²)	斜率 Slope [95% CI]	截距 Intercept [95% CI]
叶轴质量-叶轴长度 Rachis mass-rachis length	FM	0.912	2.337^ab [2.144, 2.547]	-3.573 [-3.841, -3.305]
	JM	0.910	2.126^b [1.946, 2.324]	-3.413 [-3.701, -3.125]
	PA	0.752	2.243^ab [1.942, 2.590]	-3.614 [-4.036, -3.191]
	MA	0.618	2.401^ab [2.009, 2.870]	-3.721 [-4.256, -3.183]
	AE	0.907	2.696^a [2.468, 2.946]	-4.620 [-5.074, -4.165]

变量 Variable (y-x)	物种 Species	相关系数Correlation coefficient (r)	p
比叶质量-复叶质量 Lamina mass per area-compound-leaf mass	FM	0.548^**	<0.001
	JM	0.665^**	<0.001
	PA	0.483^**	<0.001
	MA	0.436^**	0.002
	AE	0.955^**	<0.001
比叶质量-叶片面积 Lamina mass per area-lamina area	FM	0.249	0.081
	JM	0.555^**	<0.001
	PA	0.099	0.494
	MA	-0.135	0.349
	AE	0.814^**	<0.001
比叶质量-叶轴质量 Lamina mass per area-rachis mass	FM	0.437^**	0.002
	JM	0.574^**	<0.001
	PA	0.322^*	0.023
	MA	0.234	0.102
	AE	0.916^**	<0.001
复叶比叶质量-复叶质量 Compound-leaf mass per area-compound-leaf mass	FM	0.546^**	<0.001
	JM	0.666^**	<0.001
	PA	0.519^**	<0.001
	MA	0.419^**	0.002
	AE	0.949^**	<0.001
复叶比叶质量-叶片面积 Compound-leaf mass per area-lamina area	FM	0.267	0.061
	JM	0.559^**	<0.001
	PA	0.136	0.345
	MA	-0.155	0.282
	AE	0.842^**	<0.001
复叶比叶质量-叶轴质量 Compound-leaf mass per area-rachis mass	FM	0.470^**	0.001
	JM	0.599^**	<0.001
	PA	0.416^**	0.003
	MA	0.256	0.063
	AE	0.949^**	<0.001