浙江农业学报 ›› 2021, Vol. 33 ›› Issue (11): 2075-2084.DOI: 10.3969/j.issn.1004-1524.2021.11.10

• 园艺科学 • 上一篇    下一篇

丛枝菌根真菌对盐胁迫下番茄抗氧化酶活性和光合特性的影响

赵华1(), 任晴雯2, 王熙予2, 李珍妮2, 唐秀梅3, 蒋丽慧2, 刘鹏2, 邢承华1,*()   

  1. 1.金华职业技术学院 农学院,浙江 金华 321017
    2.浙江师范大学 植物学实验室,浙江 金华 321004
    3.广西壮族自治区农业科学院 经济作物研究所,广西 南宁 530007
  • 收稿日期:2021-03-20 出版日期:2021-11-25 发布日期:2021-11-26
  • 通讯作者: 邢承华
  • 作者简介:*邢承华,E-mail: xingchenghua@hotmail.com
    赵华(1963—),男,陕西黄陵人,学士,教授,主要从事植物生理与种质创新利用研究。E-mail: zhh5188@163.com
  • 基金资助:
    浙江省公益技术应用研究计划(LGN19C150005)

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. 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

摘要:

为探索不同丛枝菌根真菌(AMF)对盐胁迫下番茄生长的影响,建立最优番茄-AMF共生耦合体系,改良设施番茄次生盐渍化土壤提供科学依据。本研究以广泛种植的中蔬4号番茄为试验材料,以4种AMF中初筛出的地表多样孢囊霉(D.v)和幼套近明球囊霉(C.e)为接种菌剂进行土培试验,测定不同浓度盐胁迫下两种AMF对番茄抗氧化酶活性、丙二醛(MDA)含量、脯氨酸(Pro)含量、叶绿素荧光参数、光合参数及氮磷吸收等的影响,探究两种菌剂对番茄盐害效应的缓解作用,筛选出缓解效果最佳的菌剂。结果发现,D.v和C.e两种优势菌剂均具有较高的侵染率和侵染密度,明显减轻了盐逆境对番茄的伤害。盐害指数表明,未接菌组植株的盐害指数显著高于接菌组,D.v组最低,仅为35.63%。随着盐胁迫时间的延长,AMF定殖可使MDA含量增幅减缓,叶片Pro含量显著下降,最大降幅可达60.66%。接菌处理能显著提高植物光合能力,盐处理下接种D.v、C.e后,番茄Fo降幅分别高达18.29%、8.94%,Fv/Fm最高增长率为7.48%、5.58%,PnGs增幅最大可达49.12%、35.44%。接种AMF显著增强了宿主抗盐性,D.v处理后植物的SOD、POD和CAT活性达到最大增长率,分别为37.09%、95.60%、32.71%。对番茄植株各部分氮、磷营养状况的分析结果显示,D.v的促进作用更显著,全氮、全磷含量比未接菌组分别增加了18.79%、14.81%,而C.e分别为5.49%、8.11%,地下部趋势与地上部相同。据此,从4种AMF中初筛得到的D.v和C.e均能提高番茄对盐逆境的适应性,可在一定程度上缓解盐害效应,其中D.v为最佳促生菌种,可适用于番茄的规模化生产。

关键词: 丛枝菌根真菌, 番茄, 盐胁迫, 抗氧化保护酶, 光合特性

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, Fo decreased by 18.29% and 8.94%, and the highest growth rate of Fv/Fm was 7.48%, 5.58%, and the maximum increase of Pn and Gs 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

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