Allelopathic effects of Artemisia desertorum extracts on its own seed germination and seedling growth

doi:10.7522/j.issn.1000-694X.2021.00075

Journal of Desert Research ›› 2021, Vol. 41 ›› Issue (6): 21-28.DOI: 10.7522/j.issn.1000-694X.2021.00075

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Allelopathic effects of Artemisia desertorum extracts on its own seed germination and seedling growth

Fanglin Wang(), Qiushi Yu, Chengwu Chai(), Lide Wang, Dekui Zhang, Yuqi Wang, Fei Wang, Xiaoke Hu

Key Laboratory of Desertification Combating Prevention and Sandstorm Disaster of Gansu Province，Gansu Desert Control Research Institute，Lanzhou 733000，China

Received:2021-01-06 Revised:2021-05-25 Online:2021-11-20 Published:2021-12-17
Contact: Chengwu Chai

Abstract

Abstract:

The allelopathic effects of different extracts on seed germination and seedling growth of desert plant Artemisia desertorum were studied by bioassay. The results showed that：（1） The roots， branches， leaves and litters extracts of A. desertorum had inhibitory effects on seed germination， which increased with the increase of treatment concentration； The liquefaction effect of three kinds of extraction is in the order of leaf， root and litter from strong to weak. （2） The root， branchs and leaves extracts were inhibited for the growth of seedlings， while the litter extracts promoted the growth of seedlings， and mainly was performed in the dry weight of roots and root length， the dry weight of seedlings in the aboveground part was more sensitive. It was preliminarily inferred that the effects of different extracts of A. desertorum on the growth of seedlings that were mainly the underground roots， and it changed the growth status and affected the dry matter accumulation of seedlings. （3） Different extracts of A. desertorum had different effects on the physiological indexes of seedlings. The extracts of roots， branches and leaves were mainly allelopathic inhibition. The medium and low concentrations of litter extract had a promoting effect， and the promotion effect of the protective membrane system MDA was the most obvious， indicating that the protection of seedling membrane system might be the biological starting point of various effects of allelochemicals in A. desertorum litter.Comprehensive analysis： allelochemicals existing in living plants of A. desertorum are the main factors that affect （inhibit） the growth and development of its own seedlings， while allelochemicals was released by litter decomposition and decomposition can provide good nutrient conditions for the survival of its own seedlings， creating superior underground microenvironment for seedling growth， enhancing its competitiveness in harsh habitats， expanding its population and gradually forming the superiority community.

Key words: allelopathy, seed germination, seedling growth, extracts, Artemisia desertorum

CLC Number:

Q945.79

Fanglin Wang, Qiushi Yu, Chengwu Chai, Lide Wang, Dekui Zhang, Yuqi Wang, Fei Wang, Xiaoke Hu. Allelopathic effects of Artemisia desertorum extracts on its own seed germination and seedling growth[J]. Journal of Desert Research, 2021, 41(6): 21-28.

Figures/Tables 4

References 32

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浸提液浓度 /（mg·L^-1）	萌发率/%			萌发指数GI
浸提液浓度 /（mg·L^-1）	根	枝叶	枯落物	根	枝叶	枯落物
CK	96.63±0.28^Aa	96.63±0.28^Aa	96.63±0.28^Aa	65.81±0.51^Aa	65.81±0.51^Aa	65.81±0.51^Aa
5	93.25±1.52^Aa	89.49±1.2^Aa	98.25±0.91^Aa	63.31±1.15^Aa	50.22±0.33^Bb	61.84±2.14^Aa
25	88.38±2.33^ABab	77.73±0.84^Bb	98.84±1.18^Aa	53.31±3.00^Bb	41.25±2.14^Cc	60.22±0.52^Aa
50	55.50±1.25^Cc	56.49±0.91^Cc	79.96±0.64^Bb	44.01±2.05^Cc	34.16±1.12^Dd	47.15±0.69^Bb
100	29.97±1.05^Dd	22.06±2.05^Dd	55.34±1.26^Cc	33.15±2.01^Dd	20.10±0.81^Ee	47.07±0.39^Bb

浸提液浓度 /（mg·L^-1）	萌发率/%			萌发指数GI
浸提液浓度 /（mg·L^-1）	根	枝叶	枯落物	根	枝叶	枯落物
CK	96.63±0.28^Aa	96.63±0.28^Aa	96.63±0.28^Aa	65.81±0.51^Aa	65.81±0.51^Aa	65.81±0.51^Aa
5	93.25±1.52^Aa	89.49±1.2^Aa	98.25±0.91^Aa	63.31±1.15^Aa	50.22±0.33^Bb	61.84±2.14^Aa
25	88.38±2.33^ABab	77.73±0.84^Bb	98.84±1.18^Aa	53.31±3.00^Bb	41.25±2.14^Cc	60.22±0.52^Aa
50	55.50±1.25^Cc	56.49±0.91^Cc	79.96±0.64^Bb	44.01±2.05^Cc	34.16±1.12^Dd	47.15±0.69^Bb
100	29.97±1.05^Dd	22.06±2.05^Dd	55.34±1.26^Cc	33.15±2.01^Dd	20.10±0.81^Ee	47.07±0.39^Bb

浸提液浓度 /(mg·L^-1)	相对电导率（REC）/%			叶绿素含量（Chl）/(mg·g^-1)			丙二醛含量（MDA）/(μmol·g^-1)
浸提液浓度 /(mg·L^-1)	根	枝叶	枯落物	根	枝叶	枯落物	根	枝叶	枯落物
CK	40.26±0.98^Aa	40.26±0.98^Aa	40.26±0.98^Aa	3.15±1.28^Aa	3.15±1.28^Aa	3.15±1.28^Aa	5.53±2.27^Aa	5.53±2.27^Aa	5.53±2.27^Aa
5	40.33±1.33^Aa	40.18±1.19^Aa	40.21±2.41^Aa	3.12±1.02^Aa	3.14±0.33^Aa	3.15±2.14^Aa	5.58±2.18^Aa	5.81±1.33^Bb	5.56±2.01^Aa
25	40.52±2.58^Bb	40.61±2.22^Bb	40.13±1.10 ^Aa	3.06±1.22^Bb	3.08±1.11^Bb	3.19±1.52^Aa	5.62±2.05^Bb	6.08±2.14^Cc	5.28±1.67^Bb
50	50.26±1.14^Cc	50.91±1.12^Cc	30.81±2.05^Bb	3.08±1.37^Bb	2.95±1.02^Bb	3.28±1.19^Bb	5.67±2.58^Bb	6.94±1.12^Dd	4.79±1.12^Cc
100	50.87±1.20^Dd	60.38±1.04^Dd	50.11±1.04^Cc	2.97±1.29^Cc	2.88±2.05^Cc	3.14±1.39^Aa	6.08±1.31^Cc	7.27±0.81^Ee	4.66±1.28^Dd

浸提液浓度 /(mg·L^-1)	相对电导率（REC）/%			叶绿素含量（Chl）/(mg·g^-1)			丙二醛含量（MDA）/(μmol·g^-1)
浸提液浓度 /(mg·L^-1)	根	枝叶	枯落物	根	枝叶	枯落物	根	枝叶	枯落物
CK	40.26±0.98^Aa	40.26±0.98^Aa	40.26±0.98^Aa	3.15±1.28^Aa	3.15±1.28^Aa	3.15±1.28^Aa	5.53±2.27^Aa	5.53±2.27^Aa	5.53±2.27^Aa
5	40.33±1.33^Aa	40.18±1.19^Aa	40.21±2.41^Aa	3.12±1.02^Aa	3.14±0.33^Aa	3.15±2.14^Aa	5.58±2.18^Aa	5.81±1.33^Bb	5.56±2.01^Aa
25	40.52±2.58^Bb	40.61±2.22^Bb	40.13±1.10 ^Aa	3.06±1.22^Bb	3.08±1.11^Bb	3.19±1.52^Aa	5.62±2.05^Bb	6.08±2.14^Cc	5.28±1.67^Bb
50	50.26±1.14^Cc	50.91±1.12^Cc	30.81±2.05^Bb	3.08±1.37^Bb	2.95±1.02^Bb	3.28±1.19^Bb	5.67±2.58^Bb	6.94±1.12^Dd	4.79±1.12^Cc
100	50.87±1.20^Dd	60.38±1.04^Dd	50.11±1.04^Cc	2.97±1.29^Cc	2.88±2.05^Cc	3.14±1.39^Aa	6.08±1.31^Cc	7.27±0.81^Ee	4.66±1.28^Dd

浸提液种类	浓度 /%	种子萌发			幼苗形态					幼苗生理
浸提液种类	浓度 /%	萌发率	萌发指数	RI/%	苗高	根长	苗干重	根干重	RI/%	相对电导率	叶绿素	丙二醛	RI/%
根	5	3.50	3.80	3.65	-8.67	-5.06	0.02	3.37	-2.59	1.64	2.61	0.90	1.72
	25	8.54	18.99	13.77	-10.98	-2.17	7.05	4.33	-0.44	6.10	7.83	1.63	5.19
	50	42.56	33.13	37.85	7.83	8.44	15.40	22.22	13.47	23.47	6.09	2.53	10.70
	100	68.98	49.63	59.31	18.01	21.44	17.02	37.89	23.59	37.79	15.65	9.95	21.13
	RI/%	30.90	26.39	28.64	1.55	5.66	9.87	16.95	8.51	17.25	8.04	3.75	9.68
枝叶	5	11.53	23.69	17.61	0.30	2.58	3.43	6.30	3.15	-1.88	0.87	5.06	1.35
	25	19.56	37.32	28.44	8.74	2.44	10.26	22.70	11.03	8.22	6.09	9.95	8.09
	50	41.54	48.09	44.82	15.35	10.35	22.19	28.04	18.98	38.73	17.39	25.50	27.21
	100	77.17	69.46	73.31	28.04	26.58	32.55	51.81	34.75	49.77	23.48	31.46	34.90
	RI/%	37.45	44.64	41.04	13.11	10.49	17.11	27.21	16.98	23.71	11.96	17.99	17.89
枯落物	5	-1.68	6.03	2.18	-4.32	-7.84	-6.79	-6.15	-6.28	-1.17	0.00	0.54	-0.21
	25	-2.29	8.49	3.10	-9.60	-8.05	-5.36	-12.04	-8.76	-3.05	-3.48	-4.52	-3.68
	50	17.25	28.35	22.80	-0.06	-4.84	-3.95	-8.07	-4.23	-10.56	-11.30	-13.38	-11.75
	100	42.73	28.48	35.60	17.43	9.07	6.48	12.44	11.35	19.95	0.87	-15.73	1.70
	RI/%	14.00	17.84	15.92	0.86	-2.92	-2.40	-3.45	-1.98	1.29	-3.48	-8.27	-3.49

Allelopathic effects of Artemisia desertorum extracts on its own seed germination and seedling growth

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