| 摘要: |
| 该研究以盆栽福鼎大白茶(Camellia sinensis ‘Fuding Dabaicha')为材料,通过对其接种丛枝菌根真菌(AM真菌)幼套球囊霉(Clariodeoglomus etunicatum)、地表球囊霉(Diversispora versiformis)、粘屑多孢囊霉(D. spurca)以及上述三菌种的混合菌剂,研究AM真菌对茶生长、侧根数及根系內源激素的影响。结果表明:接种12周后福鼎大白茶根系能被AM真菌侵染,为18.85%～40.23%。接种AM真菌处理促进了福鼎大白茶株高、叶面积、主根长以及一级侧根和三级侧根数量,但抑制了二级侧根数(除混合菌种)。单一的AM真菌接种显著提高了福鼎大白茶根系脱落酸、玉米素核苷、赤霉素和油菜素内酯的含量,但降低了根系茉莉酸甲酯含量(除Clariodeoglomous etunicatum)。相关性分析揭示菌根诱导的福鼎大白茶根系激素变化与菌根促进福鼎大白茶侧根数有关。此外,幼套球囊霉的促生效果最显著,而混合菌种对根系形态和侧根数影响最显著。今后茶树栽培中应加强菌根管理。 |
| 关键词: 白茶, 土壤微生物, 脱落酸, 共生真菌, 侧根 |
| DOI：10.11931/guihaia.gxzw201804030 |
| 分类号:Q945 |
| 文章编号:1000-3142(2018)12-1635-06 |
| Fund project:湖北省教育厅科学技术研究项目(B2018484); 茶学生物学与资源利用国家重点实验室开放基金(SKLTOF20160112); 湖北省高等学校优秀中青年科技创新团队计划项目(T201604)[Supported by the Science and Technology Research Program of Hubei Provincial Department of Education(B2018484); Tea Biology and Resource Utilization of National Key Laboratory Open Fund(SKLTOF20160112); Plan in Scientific and Technological Innovation Team of Outstanding Youth Scientist, Hubei Provincial Departments of Education(T201604)]。 |
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| Effects of arbuscular mycorrhizal fungi on growth, lateral root number and root endogenous hormones of Camellia sinensis ‘Fuding Dabaicha' |
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XIA Tingjun1, WU Qiangsheng2,3*, SHAO Yadong3, JIANG Changjun2
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1. Hubei Ecology Polytechnic College, Wuhan 430200, China;2. State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural
University, Hefei 230036, China;3. College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, Hubei, China
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| Abstract: |
| The study was conducted to analyze the effects of Claroideoglomus etunicatum, Diversispora spurca, D. versiformis and a mixture of three arbuscular mycorrhizal fungi(AMF)species on plant growth, lateral root number and root endogenous hormones in the potted Camellia sinensis ‘Fuding Dabaicha' seedlings. After twelve weeks of AMF inoculation, roots of C. sinensis ‘Fuding Dabaicha' could be colonized by these AMF treatments, varied from 18.85% to 40.23%. AMF inoculation heavily increased plant height, total leaf area, taproot length, the number of the first- and third-order lateral roots, but the number of second-order lateral root was markedly reduced(except for mixed-AMF). Root abscisic acid, zeatin riboside, gibberellin and brassinolide levels were significantly increased by sole AMF inoculation, but the levels of methyl jasmonate in roots were significantly decreased(except for Clariodeoglomus etunicatum). Correlationship analysis revealed that mycorrhiza-regulated hormone changes in roots of Camellia sinensis ‘Fuding Dabaicha' were closely related with mycorrhiza-improved lateral root number. In addition, C. etunicatum exhibited the best effects on stimulating plant growth, and mixed AMF treatment represented the best effects on improving root morphology and lateral root number. Therefore, the management of mycorrhizas should be strengthened in tea cultivation in the future. |
| Key words: white tea, soil microorganism, ABA, symbiotic fungi, lateral root |
