Allelopathic effects of Stellera chamaejasme on seed germination and growth of three crops

doi:10.11686/cyxb2020387

Abstract

Abstract:

Stellera chamaejasme is one of the main poisonous weeds in the grassland of Northern China， and has a great impact on grassland ecology. The effects of a range of concentrations of ethanol extract from S. chamaejasme root （SCR） on seed germination， seedling growth and physiological and biochemical characteristics of sorghum （Sorghum bicolor）， wheat （Triticum aestivum） and oats （Avena sativa） were studied， in order to provide scientific data to aid in the future development and utilizationof botanical herbicides.SCR did not affect the germination rate of sorghum seed， compared to controls， at any of the concentrations tested. However， in wheat and oats SCR application at different rates induced a “low promotion and high inhibition” germination rate response. SCR also induced a “low promotion and high inhibition” response in root and stem lengths of sorghum and oat seedlings， but it had inhibitory effect root and stem length of wheat seedlings which was stronger at higher concentration of the extract. SCR increased the MDA content of oat and sorghum seedlings， the MDA content of wheat was significantly higher than that of control at 5 mg·mL^-1. The peroxidase activity in seedlings of all three tested crops was higher than that of the controls at some tested concentrations. There was no significant difference in SOD activity of sorghum seedlings treated with SCR， but SOD activity of wheat seedlings was significantly higher than that of controls at high SCR concentration， and SOD activity of oat seedlings with 0.01 mg·mL^-1 SCR treatment was significantly higher from that of controls. The activity of catalase in the seedlings of all three crops was lower than that of the controls at some SCR concentrations. Overall， the inhibition of S. chamaejasme root ethanol extract on wheat was the strongest， followed by oats and sorghum.

Key words: Stellera chamaejasme, allelopathy, seed germination, seedling growth, crops

Yu-lian GAO, Jing CHANG, Yi-hui WANG, Feng LI, Hai-ping LI, Chong-yong MA. Allelopathic effects of Stellera chamaejasme on seed germination and growth of three crops[J]. Acta Prataculturae Sinica, 2021, 30(10): 83-91.

Figures/Tables 7

References 36

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浓度 Concentration （mg·mL^-1）	发芽率Germination percentage （%）
浓度 Concentration （mg·mL^-1）	高粱Sorghum	小麦Wheat	燕麦Oat
CK	97.78±1.11a	83.33±5.09ab	65.56±5.88ab
0.01	95.56±1.11a	92.22±2.22a	72.22±2.94a
0.5	96.67±1.93a	88.89±2.22ab	67.78±9.49a
2.5	96.67±1.93a	86.67±1.93ab	64.45±2.22ab
5	96.67±3.33a	75.55±2.22bc	58.89±6.19ab
10	94.44±1.11a	78.89±4.84ab	57.78±2.22ab
25	95.56±1.11a	62.22±9.09c	48.89±4.01b

浓度 Concentration （mg·mL^-1）	发芽率Germination percentage （%）
浓度 Concentration （mg·mL^-1）	高粱Sorghum	小麦Wheat	燕麦Oat
CK	97.78±1.11a	83.33±5.09ab	65.56±5.88ab
0.01	95.56±1.11a	92.22±2.22a	72.22±2.94a
0.5	96.67±1.93a	88.89±2.22ab	67.78±9.49a
2.5	96.67±1.93a	86.67±1.93ab	64.45±2.22ab
5	96.67±3.33a	75.55±2.22bc	58.89±6.19ab
10	94.44±1.11a	78.89±4.84ab	57.78±2.22ab
25	95.56±1.11a	62.22±9.09c	48.89±4.01b

受试作物 Test crop	化感综合效应指数Synthetical effect of allelopathy （SE）						平均 Average	排名 Ranking
受试作物 Test crop	0.01 （mg·mL^-1）	0.5 （mg·mL^-1）	2.5 （mg·mL^-1）	5 （mg·mL^-1）	10 （mg·mL^-1）	25 （mg·mL^-1）	平均 Average	排名 Ranking
小麦Wheat	-0.11	-0.03	-0.07	-0.25	-0.40	-0.59	-0.24	1
燕麦Oat	0.15	0.06	-0.08	-0.22	-0.38	-0.51	-0.16	2
高粱Sorghum	0.04	0.02	-0.15	-0.22	-0.26	-0.35	-0.15	3

受试作物 Test crop	化感综合效应指数Synthetical effect of allelopathy （SE）						平均 Average	排名 Ranking
受试作物 Test crop	0.01 （mg·mL^-1）	0.5 （mg·mL^-1）	2.5 （mg·mL^-1）	5 （mg·mL^-1）	10 （mg·mL^-1）	25 （mg·mL^-1）	平均 Average	排名 Ranking
小麦Wheat	-0.11	-0.03	-0.07	-0.25	-0.40	-0.59	-0.24	1
燕麦Oat	0.15	0.06	-0.08	-0.22	-0.38	-0.51	-0.16	2
高粱Sorghum	0.04	0.02	-0.15	-0.22	-0.26	-0.35	-0.15	3

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