Plasmodesmata and Phloem Loading

胞连丝和韧皮部装载

基本信息

  • 批准号:
    0110638
  • 负责人:
  • 金额:
    --
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2001
  • 资助国家:
    美国
  • 起止时间:
    2001-09-01 至 2004-08-31
  • 项目状态:
    已结题

项目摘要

This project supports studies on the identification of phloem loading mechanisms in leaves. Sugars manufactured by photosynthesis are loaded into the phloem of minor veins for export to growing organs. There are two known phloem loading mechanisms. Apoplastic loading involves trans-membrane transport while symplastic loading takes place entirely through the plasmodesmata-connected cytoplasm. It is important to be able to distinguish between these mechanisms because they are inhibited by environmental stress, presumably in different ways. According to the current paradigm, apoplastic- and symplastic-loading species can be identified reliably by plasmodesmatal counts. An alternative hypothesis to be tested in this investigation is that apoplastic loading is universal, except for those species that translocate stachyose, or other carbohydrates of similar size, and load by polymer trapping. Phloem loading studies, based primarily on the specific inhibition of trans-membrane transport by p-chloromercuribenzenesulfonic acid, will be conducted on five species that translocate sucrose but have been putatively identified as symplastic loaders on the basis of plasmodesmatal counts. The prediction is that these plants load via the apoplast. Further studies will be conducted to test the hypothesis that plasmodesmatal frequencies in minor vein phloem reflect overall plasmodesmatal numbers in leaves, depending on plant growth habit, and are not necessarily related to phloem physiology.
该项目支持对叶中韧皮部装载机制的鉴定研究。 光合作用产生的糖被装载到小脉的韧皮部,输出到生长器官。 有两种已知的韧皮部装载机制。 质外体装载涉及跨膜运输,而共质体装载完全通过连接胞间连丝的细胞质发生。 能够区分这些机制是很重要的,因为它们受到环境压力的抑制,可能是以不同的方式。 根据目前的范例,质外体和共质体加载物种可以可靠地确定胞间连丝计数。 在这项调查中要测试的另一种假设是,质外体加载是普遍的,除了那些物种,易位水苏糖,或类似大小的其他碳水化合物,并通过聚合物捕获负载。 韧皮部装载的研究,主要是对氯汞苯磺酸的跨膜运输的特异性抑制的基础上,将进行5个物种,易位蔗糖,但已被pueretically确定为共质体装载的基础上,胞间连丝计数。 预测这些植物通过质外体装载。 进一步的研究将进行测试的假设,小脉韧皮部的胞间连丝的频率反映了整体的胞间连丝数量在叶中,取决于植物的生长习性,并不一定与韧皮部的生理。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)

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Robert Turgeon其他文献

Complexity untwined: The structure and function of cucumber (Cucumis sativus L.) shoot phloem
  • DOI:
    10.1111/tpj.15229
  • 发表时间:
    2021
  • 期刊:
  • 影响因子:
  • 作者:
    Xiaolei Sui;Jing Nie;Huan Liu;Tao Lin;Xuehui Yao;Robert Turgeon
  • 通讯作者:
    Robert Turgeon
Amborella trichopoda, plasmodesmata, and the evolution of phloem loading
  • DOI:
    10.1007/s00709-010-0237-2
  • 发表时间:
    2010-11-16
  • 期刊:
  • 影响因子:
    2.500
  • 作者:
    Robert Turgeon;Richard Medville
  • 通讯作者:
    Richard Medville
Efflux of sucrose from minor veins of tobacco leaves
  • DOI:
    10.1007/bf00395471
  • 发表时间:
    1984-05-01
  • 期刊:
  • 影响因子:
    3.800
  • 作者:
    Robert Turgeon
  • 通讯作者:
    Robert Turgeon
Structure of grafted crown-gall teratoma shoots of tobacco: Regulation of transformed cells
  • DOI:
    10.1007/bf00385316
  • 发表时间:
    1981-10-01
  • 期刊:
  • 影响因子:
    3.800
  • 作者:
    Robert Turgeon
  • 通讯作者:
    Robert Turgeon
Photosynthetic acclimation in the context of structural constraints to carbon export from leaves
  • DOI:
    10.1007/s11120-006-9123-3
  • 发表时间:
    2007-01-09
  • 期刊:
  • 影响因子:
    3.700
  • 作者:
    William W. Adams;Amy M. Watson;Kristine E. Mueh;Véronique Amiard;Robert Turgeon;Volker Ebbert;Barry A. Logan;Andrew F. Combs;Barbara Demmig-Adams
  • 通讯作者:
    Barbara Demmig-Adams

Robert Turgeon的其他文献

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{{ truncateString('Robert Turgeon', 18)}}的其他基金

Heterogeneity in the phloem of minor veins
小静脉韧皮部的异质性
  • 批准号:
    1354718
  • 财政年份:
    2014
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Passive Phloem Loading
韧皮部被动加载
  • 批准号:
    1121254
  • 财政年份:
    2012
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
A New Approach to the Study of Symplastic Phloem Loading
共塑韧皮部负荷研究的新方法
  • 批准号:
    0444119
  • 财政年份:
    2005
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
Conference: The Fifth International Conference on Plasmodesmatal Biology to be held in Monterey Peninsula, California on August 17-21, 2004.
会议:第五届国际胞间连丝生物学会议将于2004年8月17-21日在加利福尼亚州蒙特利半岛举行。
  • 批准号:
    0422312
  • 财政年份:
    2004
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Collaborative Research: Photosynthetic Acclimation, Photoprotection, and Phloem Loading
合作研究:光合适应、光保护和韧皮部负载
  • 批准号:
    0235709
  • 财政年份:
    2003
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Conference: Fourth International Workshop in Plasmodesmatal Biology, to be held August 19-24, 2001 in Cape Town, South Africa.
会议:第四届胞间连丝生物学国际研讨会,将于 2001 年 8 月 19-24 日在南非开普敦举行。
  • 批准号:
    0110589
  • 财政年份:
    2001
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Phloem Transport Without Phloem Loading
无韧皮部装载的韧皮部运输
  • 批准号:
    9603152
  • 财政年份:
    1997
  • 资助金额:
    --
  • 项目类别:
    Continuing grant
Conference: 3rd International Workshop in Plasmodesmal Biology to be held in Zichron Yakov, Israel, from March 10- 15, 1996
会议:第三届胞间连丝生物学国际研讨会将于 1996 年 3 月 10 日至 15 日在以色列 Zichron Yakov 举行
  • 批准号:
    9514724
  • 财政年份:
    1996
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
The Function of Intermediary Cells in Leaves
叶子中间细胞的功能
  • 批准号:
    9419703
  • 财政年份:
    1995
  • 资助金额:
    --
  • 项目类别:
    Continuing grant
Sink-Source Transition in Leaves: A Model
叶子中的库-源转变:模型
  • 批准号:
    9104159
  • 财政年份:
    1991
  • 资助金额:
    --
  • 项目类别:
    Continuing grant

相似海外基金

Virus Mediated Phloem Loading Involves the Suppression of Age Related Resistance
病毒介导的韧皮部负载涉及年龄相关抵抗力的抑制
  • 批准号:
    1644713
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
CAREER: Molecular mechanisms of phloem transport and seed loading of heavy metals
职业:韧皮部运输和种子负载重金属的分子机制
  • 批准号:
    1252706
  • 财政年份:
    2013
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
Passive Phloem Loading
韧皮部被动加载
  • 批准号:
    1121254
  • 财政年份:
    2012
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
A New Approach to the Study of Symplastic Phloem Loading
共塑韧皮部负荷研究的新方法
  • 批准号:
    0444119
  • 财政年份:
    2005
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
Collaborative Research: Photosynthetic Acclimation, Photoprotection, and Phloem Loading
合作研究:光合适应、光保护和韧皮部负载
  • 批准号:
    0235709
  • 财政年份:
    2003
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Collaborative Research: Photosynthetic Acclimation, Photoprotection, and Phloem Loading
合作研究:光合适应、光保护和韧皮部负载
  • 批准号:
    0235351
  • 财政年份:
    2003
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Phloem Transport Without Phloem Loading
无韧皮部装载的韧皮部运输
  • 批准号:
    9603152
  • 财政年份:
    1997
  • 资助金额:
    --
  • 项目类别:
    Continuing grant
Phloem Loading and Transport of Metal Ions: Mechanisms and Regulation
韧皮部金属离子的装载和运输:机制和调控
  • 批准号:
    9630341
  • 财政年份:
    1996
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Leaf Structure in Relation to Solute Transport and Phloem Loading
与溶质运输和韧皮部负荷相关的叶片结构
  • 批准号:
    9001759
  • 财政年份:
    1990
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
Leaf Structure in Relation to Solute Transport and Phloem Loading
与溶质运输和韧皮部负荷相关的叶片结构
  • 批准号:
    8701116
  • 财政年份:
    1987
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
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