Variations and Trade-offs in Reproductive Organ Traits of an Invasive Plant Plantago virginica in Different Habitats

doi:10.7525/j.issn.1673-5102.2022.04.004

Abstract

Abstract:

Improving reproductive ability of invasive plants might be an important mechanism for successful invasion， but there might be different in variation of reproductive organ traits among the different habitats， especially in the trade-off relationship. The plant Plantago virginica was taken as material， the inflorescences in three habitats including lawn， wasteland and understory， were collected to investigate the differences of morphology， biomass， and the allometric relationship of spikelet and peduncle among different habitats. The results showed that， there were significant differences in most inflorescence morphological and biomass indexes of P. virginica in different habitats. The inflorescences of P. virginica in lawn and wasteland habitats were slender， while that in understory habitat was short and strong. The allometric relationships among different traits of reproductive organs of P. virginica were both conservative and variable， showing different environmental sensitivities. The size dependence of reproductive resource allocation of P. virginica in different habitats was also inconsistent. Therefore， the inflorescence traits and resource allocation of P. virginica in different habitats are both plastic and relatively conservative， which might be an important manifestation of its high invasive ability.

Key words: Plantago virginica, habitat heterogeneity, reproductive allocation, allometry, inflorescence

CLC Number:

Q948

Li GONG, Wei ZHAI, Dan LÜ, Shihang ZHANG, Yuying GE, Zhi HONG, Ye TAO. Variations and Trade-offs in Reproductive Organ Traits of an Invasive Plant Plantago virginica in Different Habitats[J]. Bulletin of Botanical Research, 2022, 42(4): 544-555.

Figures/Tables 7

Table 1

Table 2

Fig.1

Fig.2

Fig.3

Table 3

Scaling exponent， intercept， and shift types for allometric relationships between morphological trait and biomass of reproductive organ of P. virginica in different habitats

指标 Index	生境 Habitat	R²	P	异速生长指数 Scaling exponent	截距 Intercept	漂移类型 Shift type
X=PD，Y=PM	草坪CP	0.454	0.000	1.497±0.456a	-1.597±0.053a
	荒地HD	0.395	0.000	1.702±0.413a	-1.554±0.058a
	林下LX	0.291	0.008	1.545±0.591a	-1.638±0.092a
共同斜率和截距 Common slope and intercept		t=0.496	0.806	1.601±0.268	-1.586	无漂移 No shift
X=PD，Y=PM	草坪CP	0.438	0.000	2.887±0.892a	-1.524±0.104a
	荒地HD	0.481	0.000	2.836±0.636a	-1.527±0.087a
	林下LX	0.597	0.000	2.135±0.615a	-1.450±0.090a
共同斜率和截距 Common slope and intercept		t=2.960	0.240	2.626±0.412	-1.513	无漂移 No shift
X=PD，Y=IM	草坪CP	0.553	0.000	2.026±0.558a	-1.254±0.064a
	荒地HD	0.482	0.000	2.153±0.483a	-1.237±0.066a
	林下LX	0.512	0.000	1.847±0.586a	-1.227±0.086a
共同斜率和截距 Common slope and intercept		t=0.649	0.734	2.035±0.306	-1.244	无漂移 No shift
X=SW，Y=SM	草坪CP	0.314	0.002	2.358±0.805a	-2.794±0.400
	荒地HD	0.468	0.000	2.423±0.551a	-2.656±0.231
	林下LX	0.622	0.000	1.341±0.374b	-2.396±0.267
共同斜率和截距 Common slope and intercept		t=11.232	0.004	无Null	无Null	A型漂移 Shift A
X=SW，Y=IM	草坪CP	0.332	0.002	1.654±0.557ab	-2.145±0.277
	荒地HD	0.458	0.000	1.840±0.422a	-2.094±0.177
	林下LX	0.651	0.000	1.160±0.311b	-2.045±0.222
共同斜率和截距 Common slope and intercept		t=6.908	0.023	无Null	无Null	A型漂移 Shift A
X=SV，Y=SM	草坪CP	0.813	0.000	0.861±0.153a	-1.223±0.106b
	荒地HD	0.743	0.000	0.685±0.108a	-1.141±0.098a
	林下LX	0.665	0.000	0.613±0.161a	-1.262±0.094b
共同斜率和截距 Common slope and intercept		t=5.798	0.055	0.728±0.121	无Null	D型漂移 Shift D
X=SV，Y=IM	草坪CP	0.763	0.000	0.604±0.121a	-1.019±0.084b
	荒地HD	0.704	0.000	0.520±0.088a	-0.947±0.080a
	林下LX	0.687	0.000	0.531±0.135a	-1.089±0.079b
共同斜率和截距 Common slope and intercept		t=1.412	0.490	0.549±0.063	无Null	D型漂移 Shift D
X=PM，Y=SM	草坪CP	0.398	0.000	1.928±0.616a	1.556±1.034a
	荒地HD	0.742	0.000	1.666±0.264a	1.063±0.440ab
	林下LX	0.712	0.000	1.382±0.336a	0.813±0.565b
共同斜率和截距 Common slope and intercept		t=3.083	0.222	1.623±0.202	无Null	B型漂移 Shift B

Table 3

Fig.4

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生境 Habitat	变异系数 Coefficients of variation
生境 Habitat	花穗宽度 Spikelet width	花穗长度 Spikelet length	花序柄直径 Peduncle diameter	花序柄长度 Peduncle length	花序长度 Inflorescence length	花穗体积 Spikelet volume	花穗生物量 Spikelet mass	花序柄生物量 Peduncle mass	花序生物量 Inflorescence mass
草坪CP	0.306	0.479	0.216	0.203	0.163	0.664	0.791	0.331	0.540
荒地HD	0.217	0.458	0.258	0.213	0.233	0.738	0.739	0.417	0.550
林下LX	0.417	0.198	0.297	0.431	0.338	0.924	0.717	0.474	0.599

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