丛枝菌根真菌对烟草香气相关物质代谢的影响

doi:10.13287/j.1001-9332.202004.031

摘要/Abstract

摘要： 丛枝菌根(AM)真菌能够与植物共生,促进寄主植株营养元素的吸收,提高植株抗逆性,但鲜见其对香气物质代谢作用的报道。本试验研究了AM真菌摩西球囊霉对烟草叶片腺毛和香气相关物质代谢的影响。结果表明: 接种AM真菌能够增加烟草叶片腺毛的密度,并诱导烟草叶片腺体毛状体脂质分泌所必需的腺体特异性脂质转运蛋白基因(NtLTP1)表达量增加;提高香气相关物质绿原酸、茄尼醇和类胡萝卜素含量;同时促进了香气物质合成途径中关键酶苯丙氨酸解氨酶(PAL)和多酚氧化酶(PPO)活性;诱导香气相关物质代谢关键酶苯丙酰胺转氨酶和多酚氧化酶基因NtPAL和NtPPOE,以及黄酮醇合酶和角鲨烯合酶基因NtFLS和NtTSS表达上调。说明接种摩西球囊霉能够增加香气产生部位腺毛的数量和分泌活性,并促进烟草叶片香气物质的生物合成过程。

Abstract: Arbuscular mycorrhizal fungi (AMF) can promote nutrient absorption and improve stress resistance of host plants. The effects of AMF on aroma substance metabolism were rarely examined. In this study, we investigated the effects of AMF (Glomus mosseae) on glands and metabolism of aroma substances in tobacco leaves. The results showed that the density of gland hair and the relative expression of the glandular-specific lipid transporter gene NtLTP1, which was necessary to induce lipid secretion, were higher in the leaves of tobacco inoculated with AMF. The content of main aroma substances in tobacco leaves, such as carotenoids, chlorogenic acid and solanesol, were increased. Moreover, AMF inoculation increased the activities of phenylalanine ammonia-lyase (PAL) and polyphenol oxidase (PPO), the key aroma substance synthesis enzymes, and caused upregulation in the relative expression of phenylalanine transaminase, polyphenoloxidase, flavonoids alcoholase and squalene synthase encoding genes. In all, the symbiosis with G. mosseae could increase the abundance and secretory activity of glandular hairs and promote the synthesis of aroma substances in tobacco leaves.

赵方贵, 渠峰, 车永梅, 姚甲淋, 刘新. 丛枝菌根真菌对烟草香气相关物质代谢的影响[J]. 应用生态学报, 2020, 31(4): 1298-1304.

ZHAO Fang-gui, QU Feng, CHE Yong-mei, YAO Jia-lin, LIU Xin. Effects of arbuscular mycorrhizal fungi on metabolism of aroma substances in tobacco[J]. Chinese Journal of Applied Ecology, 2020, 31(4): 1298-1304.

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