Root morphology of different poplar clone stecklings under waterlogging and flooding treatment

doi:10.3969/j.issn.1000-2006.201808044

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2019, Vol. 43 ›› Issue (5): 1-8.doi: 10.3969/j.issn.1000-2006.201808044

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Root morphology of different poplar clone stecklings under waterlogging and flooding treatment

ZHAO Xiaojun(), CHENG Fang, ZHANG Kang, HUANG Kaidong, NI Yun, MENG Xiao, TANG Luozhong^*()

Co-Innovation Center for the Sustainable Forestry in Southern China,College of Forestry, Nanjing Forestry University,Nanjing 210037,China

Received:2018-08-23 Revised:2019-01-02 Online:2019-10-08 Published:2019-10-08
Contact: TANG Luozhong E-mail:2811498726@qq.com;luozhongtang@njfu.edu.cn

Abstract

Abstract:

【Objective】 In this study, the root morphology of different poplar (Populus sp.) clone seedlings under waterlogging and flooding treatment was explored, and the adaptive strategies of the poplar root system were elucidated to provide a scientific basis for the selection of poplar clones. 【Method】 Five poplar clones, i.e., 3804, 1388, 895, 110 and 328, were selected, and three treatments, i.e., control, waterlogging and flooding, were set up to determine the effects of different treatments on root characteristics such as biomass, total length, quantity, surface area and volume. 【Result】 ① There was no significant difference between the control and waterlogging groups in terms of poplar root biomass; however, in the flooding group, root biomass was significantly lower than that in the control group. ② No significant difference was found in terms of the number of first-order roots of most poplar clone stecklings between the treatment and control groups, but the total root length, projection area, surface area and volume were greater in the treatment groups than in the control group. ③ Compared with the control group, the treatment groups had decreased average root diameter but had increased number of root tips, root forks and root crossings. ④ The cumulative contribution rate of the two principal components extracted by principal component analysis was 88.58%, which may reflect the root morphological characteristics of poplar clone stecklings. 【Conclusion】 Subordinate function analysis showed that the order of the poplar clone stecklings based on root morphological performance for both treatment was as follows: waterlogging treatment, poplar 1388 > poplar 895>poplar 3804>poplar 110>poplar 328 and flooding treatment, poplar 1388>poplar 895>poplar 110>poplar 328>poplar 3804. In conclusion, based on the root morphology, we suggest that poplar 1388 and poplar 895 are more resistant to waterlogging and flooding among all studied poplar clone stecklings.

Key words: poplar (Populus spp.) clone, waterlogging treatment, flooding treatment, root morphology, comprehensive evaluation

CLC Number:

S718

ZHAO Xiaojun, CHENG Fang, ZHANG Kang, HUANG Kaidong, NI Yun, MENG Xiao, TANG Luozhong. Root morphology of different poplar clone stecklings under waterlogging and flooding treatment[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2019, 43(5): 1-8.

Figures/Tables 8

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成分 component	初始特征值initial eigenvalue
成分 component	特征值 eigenvalue	贡献率/% contribution rate	累积贡献率/% cumulative contribution rate
1	9.27	77.26	77.26
2	1.36	11.32	88.58
3	0.63	5.22	93.80
4	0.30	2.52	96.32
5	0.24	2.02	98.34
6	0.10	0.83	99.17
7	0.07	0.57	99.74
8	0.02	0.18	99.92
9	0.01	0.06	99.97
10	0.00	0.02	99.99
11	0.00	0.00	100.00
12	0.00	0.00	100.00

指标index	主成分 principal component
指标index	1	2
根生物量root biomass(X₁)	0.79	0.44
一级根数量number of first order root(X₂)	0.74	0.33
平均根长average root length(X₃)	0.78	0.42
最长根长maximum root length(X₄)	0.85	0.21
总根长total root length(X₅)	0.99	-0.13
总根投影面积total root projection area(X₆)	0.99	-0.05
总根表面积total root surface area(X₇)	0.99	-0.05
总根体积total root volume(X₈)	0.99	0.04
根平均直径root average diameter(X₉)	-0.44	0.84
根尖数root tips number(X₁₀)	0.91	-0.18
根系分叉数root forks number(X₁₁)	0.96	-0.19
根系交叉数root crossings number(X₁₂)	0.95	-0.21

指标index	渍水waterlogging					淹水flooding
指标index	3804杨 poplar 3804	1388杨 poplar 1388	895杨 poplar 895	110杨 poplar 110	328杨 poplar 328	3804杨 poplar 3804	1388杨 poplar 1388	895杨 poplar 895	110杨 poplar 110	328杨 poplar 328
根生物量root biomass	0.99	1.00	0.65	0.53	0.00	0.13	1.00	0.69	0.50	0.00
一级根数量number of first order root	1.00	0.55	0.48	0.00	0.37	0.44	0.57	1.00	0.00	0.23
平均根长average root length	0.28	0.46	0.76	1.00	0.00	0.00	0.69	1.00	0.42	0.02
最长根长maximum root length	0.44	0.63	1.00	0.55	0.00	0.00	0.61	1.00	0.47	0.11
总根长total root length	0.77	1.00	0.86	0.74	0.00	0.00	1.00	0.82	0.25	0.97
总根投影面积total root projection area	0.83	1.00	0.66	0.48	0.00	0.00	1.00	0.73	0.15	0.09
总根表面积total root surface area	0.71	1.00	0.76	0.55	0.00	0.00	1.00	0.78	0.16	0.99
总根体积total root volume	0.85	1.00	0.65	0.35	0.00	0.00	1.00	0.95	0.09	0.08
根平均直径root average diameter	0.55	0.50	0.64	1.00	0.00	0.00	0.83	0.47	1.00	0.40
根尖数root tips number	0.95	1.00	0.92	0.72	0.00	0.37	1.00	0.66	0.01	0.00
根系分叉数root forks number	0.61	1.00	0.56	0.46	0.00	0.00	1.00	0.37	0.34	0.19
根系交叉数root crossings number	0.16	1.00	0.69	0.37	0.00	0.00	1.00	0.72	0.45	0.28
平均值average value	0.68	0.85	0.72	0.56	0.03	0.08	0.89	0.85	0.32	0.28
排序rank	3	1	2	4	5	5	1	2	3	4

Root morphology of different poplar clone stecklings under waterlogging and flooding treatment

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