Response of resource allocation of Saussurea leontodontoides during its fruiting stage to the elevation

doi:10.17521/cjpe.2020.0201

Abstract

Abstract:

Aims Our objective is to study the differences between the reproduction characteristics and resource allocation of Saussurea leontodontoides in the fruiting stage across six levels of the elevation gradient, and analyze the relationship between the above two parameters and individual size of S. leontodontoides.
Methods The study site is located in the northeastern margin of the Qingzang Plateau. The collection and investigation were carried out on the fruiting individuals of S. leontodontoides which were distributed in an elevation range of 3 200-4 540 m. 40 complete individuals were randomly collected from each level of the elevation. The number of seeds in each capitulum was counted, then the biomass was measured after drying at 80 °C in the oven. The differences between the reproduction characteristics and resource allocation of S. leontodontoides at different levels of the elevation gradient were analyzed by ANOVA. The relationship between the reproduction characteristics with individual size, resource allocation with individual size at different levels of the elevation gradient was analyzed by the allometric model.
Important findings Our results showed that: 1) The individual size, reproductive organ biomass, vegetative organ biomass, seed number and vegetative allocation were negatively correlated with elevation; the hundred grain mass and reproductive allocation were positively correlated with elevation. 2) Along the elevation gradient, the hundred grain mass, the seed number, the reproductive organs biomass and the vegetative allocation were positively correlated with individual size; reproductive allocation was negatively related to individual size; and vegetative organ biomass and individual size were significantly positively correlated. This indicates that the elevation and individual size had different effects on the reproductive strategy of S. leontodontoides. Our study suggests that S. leontodontoides adapted to the high-elevation stress environment by increasing the reproductive organs biomass and the hundred grain mass.

Key words: elevation, Saussurea leontodontoides, allometric model, reproductive allocation

LI Lei, WANG Yi-Feng, GOU Wen-Xia, MA Wen-Mei, JIANG Chun-Ling. Response of resource allocation of Saussurea leontodontoides during its fruiting stage to the elevation[J]. Chin J Plant Ecol, 2020, 44(11): 1164-1171.

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https://www.plant-ecology.com/EN/Y2020/V44/I11/1164

Figures/Tables 6

References 40

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种群数量 Population number	采集时间 Collection date	海拔 Altitude (m)	经纬度 Latitude and longitude	采样地 Sampling site	生境类型 Habitat Type	样本数 Sample size
1	2018-08-26	3 200	102.89° E, 34.91° N	合作市电视塔山 TV Tower Mountain in Hezuo	山坡草甸 Hillside meadow	40
1	2017-08-30	3 490	101.11° E, 36.43° N	湟源县日月山 Riyue Mountain, Huangyuan	山坡草甸 Hillside meadow	40
1	2018-08-28	3 690	101.69° E, 33.78° N	玛曲县阿万仓山 Awancang Mountain, Maqu	山坡草甸 Hillside meadow	40
1	2017-08-31	3 970	99.44° E, 35.40° N	兴海县温泉乡 Wenquan Township, Xinghai	山坡草甸 Hillside meadow	40
1	2017-08-31	4 260	98.21° E, 34.91° N	玛多县城 Madoi County	山坡草甸 Hillside meadow	40
1	2017-08-12	4 540	92.73° E, 34.45° N	治多县109国道旁 Next to national highway 109 in Zhidoi	山坡草甸 Hillside meadow	40

种群数量 Population number	采集时间 Collection date	海拔 Altitude (m)	经纬度 Latitude and longitude	采样地 Sampling site	生境类型 Habitat Type	样本数 Sample size
1	2018-08-26	3 200	102.89° E, 34.91° N	合作市电视塔山 TV Tower Mountain in Hezuo	山坡草甸 Hillside meadow	40
1	2017-08-30	3 490	101.11° E, 36.43° N	湟源县日月山 Riyue Mountain, Huangyuan	山坡草甸 Hillside meadow	40
1	2018-08-28	3 690	101.69° E, 33.78° N	玛曲县阿万仓山 Awancang Mountain, Maqu	山坡草甸 Hillside meadow	40
1	2017-08-31	3 970	99.44° E, 35.40° N	兴海县温泉乡 Wenquan Township, Xinghai	山坡草甸 Hillside meadow	40
1	2017-08-31	4 260	98.21° E, 34.91° N	玛多县城 Madoi County	山坡草甸 Hillside meadow	40
1	2017-08-12	4 540	92.73° E, 34.45° N	治多县109国道旁 Next to national highway 109 in Zhidoi	山坡草甸 Hillside meadow	40

海拔 Altitude (m)	种子百粒质量 Hundred grain mass (g)	种子数 Seed number	繁殖器官生物量 Reproductive organ biomass (g)	营养器官生物量 Vegetative organ biomass (g)	繁殖分配 Reproductive allocation	营养分配 Vegetative allocation
3 200	y = -1.686 + 0.386x R²= 0.187, p = 0.004	y = 2.259 + 0.338x R²= 0.135, p = 0.200	y = -0.275 + 0.418x R²= 0.084, p = 0.066	y = -0.216 + 1.157x R²= 0.917, p < 0.01	y = -0.281 - 0.574x R²= 0.149, p = 0.014	y = -0.220 + 1.161x R²= 0.184, p = 0.006
3 490	y = -1.462 + 0.113x R²= 0.057, p = 0.126	y = 2.246 + 0.329x R²= 0.108, p = 0.040	y = -0.498 + 0.775x R²= 0.641, p < 0.01	y = -0.221 + 1.129x R²= 0.955, p < 0.01	y = -0.498 - 0.223x R²= 0.133, p = 0.021	y = -0.211 + 0.115x R²= 0.182, p = 0.004
3 690	y = -1.439 + 0.107x R²= 0.081, p = 0.072	y = 2.182 + 0.405x R²= 0.173, p = 0.009	y = -0.370 + 0.581x R²= 0.265, p = 0.001	y = -0.196 + 1.102x R²= 0.916, p < 0.01	y = -0.368 - 0.422x R²= 0.160, p = 0.011	y = -0.191 + 0.094x R²= 0.076, p = 0.070
3 970	y = -1.419 + 0.102x R²= 0.053, p = 0.154	y = 2.270 + 0.260x R²= 0.14, p = 0.015	y = -0.119 + 0.208x R²= 0.09, p = 0.064	y = -0.297 + 1.183x R²= 0.798, p = 0.010	y = -0.119 - 0.791x R²= 0.583, p < 0.01	y = -0.298 + 0.185x R²= 0.092, p = 0.054
4 260	y = -1.376 + 0.060x R²= 0.047, p = 0.185	y = 2.375 + 0.064x R²= 0.038, p = 0.196	y = -0.229 + 0.299x R²= 0.152, p = 0.013	y = -0.341 + 1.192x R²= 0.751, p < 0.01	y = -0.226 - 0.704x R²= 0.497, p < 0.01	y = -0.343 + 0.196x R²= 0.075, p = 0.091
4 540	y = -1.516 + 0.376x R²= 0.231, p = 0.003	y = 2.264 + 0.272x R²= 0.098, p = 0.049	y = -0.430 + 0.697x R²= 0.262, p = 0.001	y = -0.164 + 0.940x R²= 0.385, p < 0.01	y = -0.439 - 0.287x R²= 0.055, p = 0.144	y = -0.182 + 0.024x R²= 3.94E^-4, p = 0.840
F				B: 0.790^ns A: 9.886^**

海拔 Altitude (m)	种子百粒质量 Hundred grain mass (g)	种子数 Seed number	繁殖器官生物量 Reproductive organ biomass (g)	营养器官生物量 Vegetative organ biomass (g)	繁殖分配 Reproductive allocation	营养分配 Vegetative allocation
3 200	y = -1.686 + 0.386x R²= 0.187, p = 0.004	y = 2.259 + 0.338x R²= 0.135, p = 0.200	y = -0.275 + 0.418x R²= 0.084, p = 0.066	y = -0.216 + 1.157x R²= 0.917, p < 0.01	y = -0.281 - 0.574x R²= 0.149, p = 0.014	y = -0.220 + 1.161x R²= 0.184, p = 0.006
3 490	y = -1.462 + 0.113x R²= 0.057, p = 0.126	y = 2.246 + 0.329x R²= 0.108, p = 0.040	y = -0.498 + 0.775x R²= 0.641, p < 0.01	y = -0.221 + 1.129x R²= 0.955, p < 0.01	y = -0.498 - 0.223x R²= 0.133, p = 0.021	y = -0.211 + 0.115x R²= 0.182, p = 0.004
3 690	y = -1.439 + 0.107x R²= 0.081, p = 0.072	y = 2.182 + 0.405x R²= 0.173, p = 0.009	y = -0.370 + 0.581x R²= 0.265, p = 0.001	y = -0.196 + 1.102x R²= 0.916, p < 0.01	y = -0.368 - 0.422x R²= 0.160, p = 0.011	y = -0.191 + 0.094x R²= 0.076, p = 0.070
3 970	y = -1.419 + 0.102x R²= 0.053, p = 0.154	y = 2.270 + 0.260x R²= 0.14, p = 0.015	y = -0.119 + 0.208x R²= 0.09, p = 0.064	y = -0.297 + 1.183x R²= 0.798, p = 0.010	y = -0.119 - 0.791x R²= 0.583, p < 0.01	y = -0.298 + 0.185x R²= 0.092, p = 0.054
4 260	y = -1.376 + 0.060x R²= 0.047, p = 0.185	y = 2.375 + 0.064x R²= 0.038, p = 0.196	y = -0.229 + 0.299x R²= 0.152, p = 0.013	y = -0.341 + 1.192x R²= 0.751, p < 0.01	y = -0.226 - 0.704x R²= 0.497, p < 0.01	y = -0.343 + 0.196x R²= 0.075, p = 0.091
4 540	y = -1.516 + 0.376x R²= 0.231, p = 0.003	y = 2.264 + 0.272x R²= 0.098, p = 0.049	y = -0.430 + 0.697x R²= 0.262, p = 0.001	y = -0.164 + 0.940x R²= 0.385, p < 0.01	y = -0.439 - 0.287x R²= 0.055, p = 0.144	y = -0.182 + 0.024x R²= 3.94E^-4, p = 0.840
F				B: 0.790^ns A: 9.886^**