Effects of enhanced UV-B radiation and nitrogen deposition on the growth of invasive plant Triadica sebifera

doi:10.17521/cjpe.2016.0292

Abstract

Abstract:

Aims Exotic plant invasions are important components of global change, threatening both the stability and function of invaded ecosystems. Shifts in competitive ability of invasive plants versus their native congeners have been documented. Enhanced UV-B radiation and nitrogen (N) deposition might interact with soil biota communities impacting the invasion process of exotic plant species. To understand the potential effects by UV-B and N with soil biota on plant growth would enhance our understanding of the mechanisms in plant invasions in the context of global change.
Methods We conducted a full-factorial pot experiment in the native range (China) of Triadica sebifera invading US to investigate how UV-B radiation, N and soil biota together determined their seedling growth.
Important findings The results showed that UV-B radiation, N and soil sterilization together impacted the growth of T. sebifera seedlings. UV-B radiation induced changes in biomass allocation with larger leaf biomass observed in response to UV-B radiation. In addition, N increased aboveground biomass and decreased root biomass simultaneously. Soil biota imposed positive effects on growth of T. sebifera, and the addition of N amplified these positive effects. The negative effects by UV-B radiation on growth of T. sebifera showed no response to N addition. Plant height, leaf biomass and total biomass of the invasive T. sebifera populations out- performed those of the native ones. In addition, invasive T. sebifera populations weakened the dependence of root/shoot ratio and root biomass on local soil microorganisms than native populations, but enhanced that of leaf area ratio.

http://jtp.cnki.net/bilingual/detail/html/ZWSB201704009

Key words: abiotic stress, soil microorganism, resource availability, plant invasion

Bang-Liang DENG, Qian LIU, Xi-Shuai LIU, Li-Ya ZHENG, Liang-Bo JIANG, Xiao-Min GUO, Yuan-Qiu LIU, Ling ZHANG. Effects of enhanced UV-B radiation and nitrogen deposition on the growth of invasive plant Triadica sebifera[J]. Chin J Plant Ecol, 2017, 41(4): 471-479.

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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2016.0292

https://www.plant-ecology.com/EN/Y2017/V41/I4/471

Figures/Tables 7

References 36

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	种群 Population	经度 Longitude	纬度 Latitude
中国 China	福建 Fujian	119.28° E	26.07° N
	广东 Guangdong	112.38° E	24.78° N
	贵州 Guizhou	106.88° E	27.08° N
	湖北 Hubei	110.73° E	32.05° N
	江苏 Jiangsu	118.37° E	31.23° N
	江西 Jiangxi	117.12° E	28.45° N
美国 USA	Alabama	88.15° W	30.58° N
	Georgia	81.01° W	32.01° N
	Louisiana 1	93.15° W	30.23° N
	Louisiana 2	92.02° W	30.25° N
	Texas 1	95.03° W	29.78° N
	Texas 2	95.45° W	28.97° N

	种群 Population	经度 Longitude	纬度 Latitude
中国 China	福建 Fujian	119.28° E	26.07° N
	广东 Guangdong	112.38° E	24.78° N
	贵州 Guizhou	106.88° E	27.08° N
	湖北 Hubei	110.73° E	32.05° N
	江苏 Jiangsu	118.37° E	31.23° N
	江西 Jiangxi	117.12° E	28.45° N
美国 USA	Alabama	88.15° W	30.58° N
	Georgia	81.01° W	32.01° N
	Louisiana 1	93.15° W	30.23° N
	Louisiana 2	92.02° W	30.25° N
	Texas 1	95.03° W	29.78° N
	Texas 2	95.45° W	28.97° N

处理 Treatment	df	F value
处理 Treatment	df	株高 Plant height	叶片数 Leaf number	叶面积 Leaf areas	比叶面积 Specific leaf area	叶面积比 Leaf area ratio
UV	1	0.01	4.96^*	0.07	5.19^*	0.00
S	1	144.85^**	343.02^**	820.08^**	14.66^**	78.98^**
N	1	37.90^**	3.60	40.55^**	2.03	59.97^**
O	1	58.13^**	0.76	1.20	0.16	1.82
UV × S	1	0.52	0.26	0.02	0.05	0.58
UV × N	1	2.46	2.58	2.27	0.00	1.21
UV × O	1	0.05	0.22	0.20	1.01	0.05
S × N	1	19.70^**	18.90^**	73.34^**	0.11	44.87^**
S × O	1	0.22	1.86	2.09	2.59	8.57^**
N × O	1	0.01	0.28	0.52	0.01	1.12
UV × S × N	1	0.01	2.49	0.06	0.23	0.10
UV × S × O	1	0.75	1.12	0.22	0.46	0.16
UV × N × O	1	0.07	0.08	0.24	0.12	0.40
S × N × O	1	1.17	2.18	2.76	1.52	2.81
UV × S × N × O	1	0.37	0.01	1.05	0.12	0.46

处理 Treatment	df	F value
处理 Treatment	df	株高 Plant height	叶片数 Leaf number	叶面积 Leaf areas	比叶面积 Specific leaf area	叶面积比 Leaf area ratio
UV	1	0.01	4.96^*	0.07	5.19^*	0.00
S	1	144.85^**	343.02^**	820.08^**	14.66^**	78.98^**
N	1	37.90^**	3.60	40.55^**	2.03	59.97^**
O	1	58.13^**	0.76	1.20	0.16	1.82
UV × S	1	0.52	0.26	0.02	0.05	0.58
UV × N	1	2.46	2.58	2.27	0.00	1.21
UV × O	1	0.05	0.22	0.20	1.01	0.05
S × N	1	19.70^**	18.90^**	73.34^**	0.11	44.87^**
S × O	1	0.22	1.86	2.09	2.59	8.57^**
N × O	1	0.01	0.28	0.52	0.01	1.12
UV × S × N	1	0.01	2.49	0.06	0.23	0.10
UV × S × O	1	0.75	1.12	0.22	0.46	0.16
UV × N × O	1	0.07	0.08	0.24	0.12	0.40
S × N × O	1	1.17	2.18	2.76	1.52	2.81
UV × S × N × O	1	0.37	0.01	1.05	0.12	0.46

处理 Treatment	df	F value
处理 Treatment	df	叶生物量 Leaf biomass	茎生物量 Stem biomass	根生物量 Root biomass	地上生物量 Aboveground biomass	总生物量 Total biomass	根冠比 Root/shoot ratio
UV	1	4.12^*	0.73	1.32	0.10	0.94	0.37
S	1	966.67^**	794.51^**	690.14^**	1 007.44^**	1 059.72^**	4.17^*
N	1	33.38^**	0.26	53.60^**	12.80^**	10.08^**	109.60^**
O	1	0.00	6.76^**	3.73	3.80	4.33^*	2.64
UV × S	1	0.01	0.00	0.98	0.01	0.35	2.51
UV × N	1	2.49	2.37	0.12	3.35	1.21	1.79
UV × O	1	1.16	0.06	0.04	0.44	0.06	0.91
S × N	1	62.76^**	18.38^**	2.37	47.51^**	5.96^*	46.14^**
S × O	1	0.20	0.00	7.46^**	0.42	2.24	14.58^**
N × O	1	0.02	1.57	1.54	0.25	1.30	0.06
UV × S × N	1	0.07	0.04	0.00	0.19	0.00	0.07
UV × S × O	1	0.02	0.04	0.00	0.01	0.00	0.85
UV × N × O	1	0.20	0.23	0.32	0.67	0.37	0.00
S × N × O	1	3.50	0.27	0.08	1.31	0.75	0.99
UV × S × N × O	1	1.49	1.12	0.01	1.52	0.37	1.55