Effects of arbuscular mycorrhizal fungi on antioxidant enzymes activities and photosynthetic characteristics of Solanum lycopersicum L. under salt stress

doi:10.3969/j.issn.1004-1524.2021.11.10

Acta Agriculturae Zhejiangensis ›› 2021, Vol. 33 ›› Issue (11): 2075-2084.DOI: 10.3969/j.issn.1004-1524.2021.11.10

• Horticultural Science • Previous Articles Next Articles

Effects of arbuscular mycorrhizal fungi on antioxidant enzymes activities and photosynthetic characteristics of Solanum lycopersicum L. under salt stress

ZHAO Hua¹(), REN Qingwen², WANG Xiyu², LI Zhenni², TANG Xiumei³, JIANG Lihui², LIU Peng², XING Chenghua¹^,^*()

1. College of Agriculture, Jinhua Polytechnic, Jinhua 321017, China
2. Key Laboratory of Botany, Zhejiang Normal University, Jinhua 321004, China
3. Cash Crops Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China

Received:2021-03-20 Online:2021-11-25 Published:2021-11-26
Contact: XING Chenghua

Abstract

Abstract:

To explore the effects of different arbuscular mycorrhizal fungi on Solanum lycopersicum L. under salt stress, and to provide scientific basis for the establishment of the optimal symbiotic coupling system of tomato and its application to the improvement of Solanum lycopersicum L. secondary salinization planting soil, the widely planted Zhongshu No.4 tomatoes were used as experimental materials. Among the four AMFs, Diversispora versiformis (D.v) and Clariodeoglous etunicatum (C.e) with better promotion efficiency were screened as the inoculants for soil culture experiments. The effects of two kinds of arbuscular mycorrhizal fungi on antioxidant enzyme activity, malondialdehyde content, proline content, chlorophyll fluorescence parameters, photosynthetic parameters, nitrogen and phosphorus absorption of tomato were measured. The mitigation effects of two fungal agents on the salt damage of tomato were investigated in order to screen out the fungus with the best effect. The two dominant AMF fungicides had high infection rate and density, which can reduce the damage of salt stress to Solanum lycopersicum L. The results of the salt damage index showed that the salt damage index of the plants in the non-inoculated group was significantly higher than that of the inoculated group, and the salt damage index of the D.v group was the lowest, only 35.63%. With the extension of stress time, the increase of MDA content slowed down and proline (Pro) content in leaves decreased significantly, with a maximum decrease of 60.66%. The inoculation treatment could significantly improve the photosynthetic capacity of plants. After inoculation of D.v and C.e under salt treatment, F_o decreased by 18.29% and 8.94%, and the highest growth rate of F_v/F_m was 7.48%, 5.58%, and the maximum increase of P_n and G_s reached 49.12%, 35.44%. Vaccination with AMF significantly enhanced the salt resistance of the host plant. The activities of SOD, POD and CAT reached the maximum growth rate of 37.09%, 95.60% and 32.71% after D.v treatment. The results of the analysis of nitrogen and phosphorus nutrition status of each part of tomato plants showed that the promotion effect of D.v was more significant, and the total nitrogen and phosphorus contents increased by 18.79% and 14.81% compared with that of the uninocled group, and the contents of C.e were 5.49% and 8.11%, respectively. The trend of underground part was the same as that of the aboveground part. D.v and C.e obtained from the preliminary screening of four kinds of AMF could improve the adaptability of Solanum lycopersicum L. to salt stress and alleviate salt damage effect to a certain extent. Among them, D.v was the best growth-promoting strain and suitable for the large-scale production of Solanum lycopersicum L.

Key words: arbuscular mycorrhizal fungi, Solanum lycopersicum L., salt stress, antioxidant enzymes, photosynthetic characteristics

CLC Number:

ZHAO Hua, REN Qingwen, WANG Xiyu, LI Zhenni, TANG Xiumei, JIANG Lihui, LIU Peng, XING Chenghua. Effects of arbuscular mycorrhizal fungi on antioxidant enzymes activities and photosynthetic characteristics of Solanum lycopersicum L. under salt stress[J]. Acta Agriculturae Zhejiangensis, 2021, 33(11): 2075-2084.

Figures/Tables 6

References 32

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测定参数 Measured parameter	处理组 Treatment group	处理时间Treatment time/d
测定参数 Measured parameter	处理组 Treatment group	15	30	45
初始荧光 (F_o)Initial fluorescence	CK 0	0.165±0.002 c	0.170±0.004 d	0.186±0.004 c
	D.v 0	0.146±0.003 d	0.150±0.004 e	0.156±0.002 d
	C.e 0	0.156±0.005 cd	0.157±0.002 e	0.164±0.003 d
	CK 100	0.213±0.004 a	0.227±0.003 a	0.235±0.003 a
	D.v 100	0.187±0.004 b	0.189±0.003 c	0.192±0.002 c
	C.e 100	0.189±0.003 b	0.210±0.004 b	0.214±0.004 b
最大光化学效率 (F_v/F_m)	CK 0	0.802±0.003 c	0.813±0.003 b	0.807±0.005 b
Maximal photochemical efficiency	D.v 0	0.832±0.003 a	0.838±0.002 a	0.835±0.002 a
	C.e 0	0.822±0.003 b	0.820±0.005 b	0.825±0.003 a
	CK 100	0.745±0.004 e	0.744±0.005 e	0.735±0.006 e
	D.v 100	0.796±0.002 c	0.787±0.002 c	0.790±0.002 c
	C.e 100	0.777±0.003 d	0.771±0.006 d	0.776±0.004 d
气孔导度 (G_s)	CK 0	0.377±0.009 b	0.427±0.009 ab	0.398±0.007 b
Stomatal conductance/(mmol·m^-2·s^-1)	D.v 0	0.493±0.039 a	0.464±0.022 a	0.474±0.033 a
	C.e 0	0.386±0.025 b	0.388±0.030 b	0.385±0.023 b
	CK 100	0.211±0.002 c	0.196±0.013 c	0.106±0.004 c
	D.v 100	0.317±0.038 b	0.201±0.020 c	0.144±0.005 c
	C.e 100	0.233±0.0043 c	0.192±0.008 c	0.117±0.004 c
净光合速率 (P_n)	CK 0	9.614±0.312 b	11.252±0.149 b	10.386±0.540 a
Net photosynthetic rate/(μmol·m^-2·s^-1)	D.v 0	11.451±0.059 a	12.404±0.277 a	10.250±0.211 a
	C.e 0	11.373±0.277 a	11.316±0.308 b	10.561±0.118 a
	CK 100	8.623±0.417 c	5.590±0.451 c	3.109±0.176 c
	D.v 100	10.776±0.106 a	5.766±0.358 c	4.629±0.328 b
	C.e 100	9.549±0.046 b	6.334±0.298 c	3.340±0.631 c

测定参数 Measured parameter	处理组 Treatment group	处理时间Treatment time/d
测定参数 Measured parameter	处理组 Treatment group	15	30	45
初始荧光 (F_o)Initial fluorescence	CK 0	0.165±0.002 c	0.170±0.004 d	0.186±0.004 c
	D.v 0	0.146±0.003 d	0.150±0.004 e	0.156±0.002 d
	C.e 0	0.156±0.005 cd	0.157±0.002 e	0.164±0.003 d
	CK 100	0.213±0.004 a	0.227±0.003 a	0.235±0.003 a
	D.v 100	0.187±0.004 b	0.189±0.003 c	0.192±0.002 c
	C.e 100	0.189±0.003 b	0.210±0.004 b	0.214±0.004 b
最大光化学效率 (F_v/F_m)	CK 0	0.802±0.003 c	0.813±0.003 b	0.807±0.005 b
Maximal photochemical efficiency	D.v 0	0.832±0.003 a	0.838±0.002 a	0.835±0.002 a
	C.e 0	0.822±0.003 b	0.820±0.005 b	0.825±0.003 a
	CK 100	0.745±0.004 e	0.744±0.005 e	0.735±0.006 e
	D.v 100	0.796±0.002 c	0.787±0.002 c	0.790±0.002 c
	C.e 100	0.777±0.003 d	0.771±0.006 d	0.776±0.004 d
气孔导度 (G_s)	CK 0	0.377±0.009 b	0.427±0.009 ab	0.398±0.007 b
Stomatal conductance/(mmol·m^-2·s^-1)	D.v 0	0.493±0.039 a	0.464±0.022 a	0.474±0.033 a
	C.e 0	0.386±0.025 b	0.388±0.030 b	0.385±0.023 b
	CK 100	0.211±0.002 c	0.196±0.013 c	0.106±0.004 c
	D.v 100	0.317±0.038 b	0.201±0.020 c	0.144±0.005 c
	C.e 100	0.233±0.0043 c	0.192±0.008 c	0.117±0.004 c
净光合速率 (P_n)	CK 0	9.614±0.312 b	11.252±0.149 b	10.386±0.540 a
Net photosynthetic rate/(μmol·m^-2·s^-1)	D.v 0	11.451±0.059 a	12.404±0.277 a	10.250±0.211 a
	C.e 0	11.373±0.277 a	11.316±0.308 b	10.561±0.118 a
	CK 100	8.623±0.417 c	5.590±0.451 c	3.109±0.176 c
	D.v 100	10.776±0.106 a	5.766±0.358 c	4.629±0.328 b
	C.e 100	9.549±0.046 b	6.334±0.298 c	3.340±0.631 c

Effects of arbuscular mycorrhizal fungi on antioxidant enzymes activities and photosynthetic characteristics of Solanum lycopersicum L. under salt stress

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