Allelopathy of Water Extract of Quercus mongolica Dead Leaves on Orychophragmus violaceus

doi:10.11924/j.issn.1000-6850.casb2020-0353

Abstract

Abstract:

To explore whether the scarcity of understory vegetation in Quercus mongolica is due to the allelopathy of dead leaves, the dead leaves were used as test materials and Orychophragmus violaceus as the receptor material, petri dish filter paper method was used to study the effects of different concentrations of water extracts of dead leaves on the germination and seedling growth of Orychophragmus violaceus. Seeds of Orychophragmus violaceus were cultivated with water extracts of dead leaves of Quercus mongolica at concentrations of 0.00, 0.02, 0.04, 0.06, 0.08 and 0.10 g/mL, to determine the germination rate, germination potential, germination index, root length and seedling length. The results show that the germination rate, germination potential, germination index and allelopathy effect index of root length are all negative values, which show inhibition and obvious concentration effect. The allelopathy effect on the growth of Orychophragmus violaceus is a double-concentration effect of ‘low promotion and high inhibition’, which can promote the growth of seedlings when the concentration is less than 0.04 g/mL. When the concentration of the water extract is greater or equal to 0.04 g/mL, it has an inhibitory effect on the growth of seedlings, and with the increase of the concentration, the allelopathy continues to increase. When the concentration is 0.10 g/mL, the allelopathy index of root length and seedling length is -1, and the seed is only in the initial state of germination. The above results reflect that the water extract of dead leaves of Quercus mongolica has a strong allelopathic inhibitory effect on Orychophragmus violaceus.

Key words: Quercus mongolica, dead leaf water extract, allelopathy, Orychophragmus violaceus, seed, germination

CLC Number:

S451.1

Yang Liu, Wang Xinyu, Zhang Hang, Zhang Tingxiu, Yang Chengjun. Allelopathy of Water Extract of Quercus mongolica Dead Leaves on Orychophragmus violaceus[J]. Chinese Agricultural Science Bulletin, 2021, 37(19): 71-76.

Figures/Tables 9

References 25

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浓度/(g/mL)	发芽率		发芽势		发芽指数
浓度/(g/mL)	测定值/%	化感指数	测定值/%	化感指数	测定值/%	化感指数
0.00	100.00±0.00a	0.00	96.67±3.34a	0.00	39.45±0.46a	0.00
0.02	97.78±1.92a	-0.02	67.78±6.94b	-0.30	34.00±1.70a	-0.14
0.04	88.89±1.92ab	-0.11	27.78±7.70c	-0.71	21.72±2.84b	-0.45
0.06	76.76±8.82bc	-0.23	20.00±6.67c	-0.79	15.87±4.51bc	-0.60
0.08	63.33±14.53c	-0.37	4.44±7.70d	-0.95	9.66±7.20c	-0.76
0.10	34.44±11.71d	-0.66	0.00±0.00d	-1.00	2.81±0.55d	-0.93

浓度/(g/mL)	发芽率		发芽势		发芽指数
浓度/(g/mL)	测定值/%	化感指数	测定值/%	化感指数	测定值/%	化感指数
0.00	100.00±0.00a	0.00	96.67±3.34a	0.00	39.45±0.46a	0.00
0.02	97.78±1.92a	-0.02	67.78±6.94b	-0.30	34.00±1.70a	-0.14
0.04	88.89±1.92ab	-0.11	27.78±7.70c	-0.71	21.72±2.84b	-0.45
0.06	76.76±8.82bc	-0.23	20.00±6.67c	-0.79	15.87±4.51bc	-0.60
0.08	63.33±14.53c	-0.37	4.44±7.70d	-0.95	9.66±7.20c	-0.76
0.10	34.44±11.71d	-0.66	0.00±0.00d	-1.00	2.81±0.55d	-0.93

浓度/(g/mL)	根长		苗长
浓度/(g/mL)	测定值/cm	化感指数	测定值/cm	化感指数
0.00	2.78±0.22a	0.00	0.86±0.15b	0.00
0.02	2.62±0.44a	-0.06	1.20±0.21a	0.28
0.04	1.64±0.38b	-0.41	1.06±0.23ab	0.19
0.06	0.58±0.24c	-0.79	0.82±0.25b	-0.05
0.08	0.36±0.24cd	-0.87	0.42±0.20c	-0.51
0.10	0.00±0.00d	-1.00	0.00±0.00d	-1.00

浓度/(g/mL)	根长		苗长
浓度/(g/mL)	测定值/cm	化感指数	测定值/cm	化感指数
0.00	2.78±0.22a	0.00	0.86±0.15b	0.00
0.02	2.62±0.44a	-0.06	1.20±0.21a	0.28
0.04	1.64±0.38b	-0.41	1.06±0.23ab	0.19
0.06	0.58±0.24c	-0.79	0.82±0.25b	-0.05
0.08	0.36±0.24cd	-0.87	0.42±0.20c	-0.51
0.10	0.00±0.00d	-1.00	0.00±0.00d	-1.00