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应用生态学报 ›› 2020, Vol. 31 ›› Issue (9): 3033-3039.doi: 10.13287/j.1001-9332.202009.029

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不同磷水平下小麦-蚕豆间作根系形态的变化及其与内源激素的关系

王宇蕴1, 李兰1, 王瑞雪1, 汤利1,2*, 郑毅1,3   

  1. 1云南农业大学资源与环境学院, 昆明 650201;
    2云南农业大学烟草学院, 昆明 650201;
    3云南开放大学, 昆明 650223
  • 收稿日期:2020-03-28 接受日期:2020-06-29 出版日期:2020-09-15 发布日期:2021-03-15
  • 通讯作者: * E-mail: ltang@ynau.edu.cn
  • 作者简介:王宇蕴, 女, 1985年生, 博士研究生。主要从事间作系统养分高效利用研究。E-mail: yuyunwhere@163.com
  • 基金资助:
    国家自然科学基金项目(31760615)、国家重点研发计划项目(2017YFD0200207)和云南省农业基础研究联合专项(2018FG001-104)资助

Change of root morphology in intercropping systems of wheat and faba bean under different phosphorus levels and its relationship with endogenous hormones

WANG Yu-yun1, LI Lan1, WANG Rui-xue1, TANG Li1,2*, ZHENG Yi1,3   

  1. 1College of Resource and Environmental Science, Yunnan Agricultural University, Kunming 650201, China;
    2College of Tobacco, Yunnan Agricultural University, Kunming 650201, China;
    3Yunnan Open University, Kunming 650223, China
  • Received:2020-03-28 Accepted:2020-06-29 Online:2020-09-15 Published:2021-03-15
  • Contact: * E-mail: ltang@ynau.edu.cn
  • Supported by:
    the National Natural Science Foundation of China (31760615), the National Key Research & Development Program of China (2017YFD0200207) and Joint Project of Basic Agriculture Research in Yunnan Province (2018FG001-104).

摘要: 采用水培方法,研究了不同磷水平下小麦-蚕豆间作体系根系形态变化及其与内源激素的相关关系。结果表明: 与单作小麦相比,在低磷(1/2P)水平下,小麦-蚕豆间作能显著增加小麦的根长,显著减少小麦根系的平均直径,显著增加根系的表面积;在常规磷(P)水平下,间作能显著降低小麦根系的平均直径,有增加小麦根长和根表面积的趋势;与单作蚕豆相比,间作能明显促进蚕豆根系的增长,同时增加蚕豆根表面积。在1/2P水平下,间作能显著提高小麦和蚕豆根系中的生长素(IAA)、脱落酸(ABA)、水杨酸(SA)和茉莉酸(JA)含量;在P水平下,间作能显著提高小麦根系中的IAA、ABA和JA含量,单、间作小麦根系中的SA含量没有显著差异,间作显著增加了蚕豆根系中ABA和SA含量,单、间作蚕豆根系中的IAA和JA含量无显著差异。单作条件下,小麦和蚕豆根系中的内源激素(IAA、ABA、SA和JA)含量与其根系形态(根长、根平均直径和根表面积)无显著相关性;间作条件下,小麦和蚕豆根系中的IAA含量与根长和根表面积之间存在明显的正相关关系。由此可见,小麦-蚕豆间作能够诱导小麦和蚕豆根系IAA的增加。这种变化可能是驱动间作系统根系形态变化的重要因子。

关键词: 小麦-蚕豆间作, 根系形态, 内源激素, 磷水平

Abstract: We examined the correlation between changes of root morphology and endogenous hormones in intercropping systems of wheat and faba bean under different phosphorus levels by hydroponics. Compared with monocropping wheat (MW), the intercropping of wheat and faba bean (W∥F) significantly increased root length of wheat, reduced root average diameter of wheat, and increased root surface area under the condition of 1/2P (low P) level. At the conventional phosphorus level, intercropping significantly reduced root average diameter of wheat, and increased root length and root surface area. Compared with monocropping faba bean (MF), W∥F significantly promoted the growth of faba bean root and increased root surface area of faba bean. At the level of 1/2P, intercropping significantly increased the content of auxin (IAA), abscisic acid (ABA), sali-cylic acid (SA) and jasmonic acid (JA). At the conventional phosphorus level, intercropping could significantly increase the content of IAA, ABA and JA in wheat root, while no significant difference in the SA content of wheat root between monocropping and intercropping wheat was found. Intercropping could increase the content of ABA and SA in faba bean roots, but did not affect IAA and JA contents of faba bean roots. There was no significant correlation between the contents of endogenous hormones (IAA, ABA, SA and JA) and root morphology (root length, root average diameter and root surface area) of wheat and faba bean roots in wheat or faba bean monocropping system. In wheat and faba bean intercropping system, there was a positive correlation between IAA contents of wheat and faba bean and their root length and root surface area. W∥F enhanced IAA of wheat and faba bean root, which was an important factor driving the change of root morphology in the intercropping system of wheat and faba bean.

Key words: wheat and faba bean intercropping system, root morphology, endogenous hormone, phosphorus level