| 磷空间有效性对拟南芥根形态构型的影响 |
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| 引用本文： | 万惠燕,刘嘉杰,王金祥,严小龙,廖红.磷空间有效性对拟南芥根形态构型的影响[J].植物生理学通讯,2007,43(3):425-429. |
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| 作者姓名： | 万惠燕 刘嘉杰 王金祥 严小龙 廖红 |
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| 作者单位： | 华南农业大学根系生物学研究中心，华南农业大学根系生物学研究中心，华南农业大学根系生物学研究中心，华南农业大学根系生物学研究中心，华南农业大学根系生物学研究中心 广州 510642，广州 510642，广州 510642，广州 510642，广州 510642 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金 |
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| 摘 要： | 磷空间有效性显著影响拟南芥主、侧根生长。在均一的磷处理下,极度磷胁迫或过量供磷均会导致拟南芥主根变短和侧根密度降低。在分层的磷处理下,上层高磷下层低磷能明显促进主根伸长生长,提高侧根在高磷区域的密度,说明植物根系在下层低磷区感受到磷胁迫信号后,可促进上层高磷区侧根的形成和发育。
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| 关 键 词： | 磷空间有效性 根形态构型 拟南芥 |
| 修稿时间： | 2006-12-292007-04-19 |
Effects of Phosphorus Spatial Availability on Root Morphology and Architecture in Arabidopsis thaliana (L.) Heynh |
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| WAN Hui-Yan,LIU Jia-Jie,WANG Jin-Xiang,YAN Xiao-Long,LIAO Hong.Effects of Phosphorus Spatial Availability on Root Morphology and Architecture in Arabidopsis thaliana (L.) Heynh[J].Plant Physiology Communications,2007,43(3):425-429. |
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| Authors: | WAN Hui-Yan LIU Jia-Jie WANG Jin-Xiang YAN Xiao-Long LIAO Hong |
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| Institution: | Root Biology Center, South China Agricultural University, Guangzhou 510642, China |
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| Abstract: | Phosphorus spatial availability significantly altered the growth of tap and lateral roots in Arabidopsis. Under homogeneous P conditions,either severe P deficiency or excess P supply could shorten primary root length and reduce lateral root density.Under heterogeneous P conditions,high P in the top and low P in the bottom significantly stimulated primary root elongation and lateral root density in the high P zone.This indicated that plant roots in the bottom could sense the low P signal,which then facilitates the formation and development of lateral roots in the high P zone so as to acclimate spatial variation of P availability in the soil. |
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| Keywords: | P spatial availability root morphology and architecture Arabidopsis thaliana |
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