The role(s) played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
基本信息
- 批准号:183727-2007
- 负责人:
- 金额:$ 2.33万
- 依托单位:
- 依托单位国家:加拿大
- 项目类别:Discovery Grants Program - Individual
- 财政年份:2007
- 资助国家:加拿大
- 起止时间:2007-01-01 至 2008-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
I study the mutualistic interaction which exists between certain beneficial bacteria, the rhizobia, and legume plants. As the result of this interaction, the rhizobia penetrate the plant root hairs and trigger the formation of a novel structure known as the nodule. If the symbiosis is successful, the rhizobia, now hosted within the nodule, fix atmospheric nitrogen. When fixed in excess, the nitrogen becomes available to the plant. The early infection stages are thought to require two opposing chemical gradients across the cortex of the root; the successful integration of these gradients by the partners results in the initiation of the nodule. The first gradient is rhizobial in nature; complex molecules known as Nod factors are thought to be directed towards the root centre. This gradient triggers the first cell divisions of the inner cortex and the first morphological changes of the root hairs. The other gradient oriented towards the root surface is thought to involve plant hormones, specifically auxin and cytokinin (CK). In this application, I propose that, in response to the rhizobial infection, CKs coming from the vascular tissues located in the centre of the root move across several cell layers and accumulate into the inner cortical cells where they promote cell divisions. I postulate that the CKs pooled in these cells give positional information to the rhizobia, i.e., they act as a beacon, "attracting" the rhizobia towards the cells cluster. To demonstrate that CKs are important signals for nodule initiation, I will (1.) create plant chimeras with altered CK levels; (2.) inoculate the chimeras and track the rhizobial infection at the cellular level; and (3.) follow the expression of molecular markers specific for certain steps of the infection. The methods used here will likely boost the use of pea as a model plant system as this plant is now amenable to molecular techniques. In the far future, results obtained in my research program could lead to the development of methods that could override mechanisms which prevent the proper establishment of the rhizobial symbiosis. Agronomically, this development would be extremely worthwhile since successful infections of plants by rhizobia are a key step to reducing the use of chemical fertilizers on crop plants.
我研究存在于某些有益细菌、根瘤菌和豆科植物之间的互惠相互作用。作为这种相互作用的结果,根瘤菌穿透植物根毛并引发一种称为根瘤的新结构的形成。如果共生成功,根瘤菌现在寄主在根瘤内,固定大气中的氮。当固定过量时,植物可以利用氮。早期感染阶段被认为需要两种相反的化学梯度穿过根的皮层;合作伙伴成功地整合了这些梯度,导致了结节的开始。第一个梯度在本质上是根瘤菌;被称为Nod因子的复杂分子被认为是指向根中心的。这种梯度触发了内皮层的第一次细胞分裂和根毛的第一次形态变化。另一个朝向根表面的梯度被认为与植物激素有关,特别是生长素和细胞分裂素(CK)。在这个应用中,我提出,在根瘤菌感染的反应中,来自根中心维管组织的ck穿过几个细胞层并积聚到内皮质细胞中,在那里它们促进细胞分裂。我假设聚集在这些细胞中的ck给根瘤菌提供了位置信息,也就是说,它们就像一个灯塔,“吸引”根瘤菌向细胞群靠近。为了证明CK是根瘤形成的重要信号,我将(1)创建CK水平改变的植物嵌合体;(2)接种嵌合体并在细胞水平上跟踪根瘤菌感染情况;(3)跟踪感染特定步骤的分子标记的表达。这里使用的方法可能会促进豌豆作为模式植物系统的使用,因为这种植物现在适合分子技术。在遥远的将来,我的研究项目中获得的结果可能会导致方法的发展,这些方法可以超越阻止根瘤菌共生正常建立的机制。在农艺学上,这一发展将是非常值得的,因为根瘤菌成功感染植物是减少作物使用化肥的关键步骤。
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)
数据更新时间:{{ journalArticles.updateTime }}
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
数据更新时间:{{ journalArticles.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ monograph.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ sciAawards.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ conferencePapers.updateTime }}
{{ item.title }}
- 作者:
{{ item.author }}
数据更新时间:{{ patent.updateTime }}
Guinel, Frédérique其他文献
Guinel, Frédérique的其他文献
{{
item.title }}
{{ item.translation_title }}
- DOI:
{{ item.doi }} - 发表时间:
{{ item.publish_year }} - 期刊:
- 影响因子:{{ item.factor }}
- 作者:
{{ item.authors }} - 通讯作者:
{{ item.author }}
{{ truncateString('Guinel, Frédérique', 18)}}的其他基金
Mama Aki Camp - Mother Earth Camp
Mama Aki 营 - 地球母亲营
- 批准号:
531706-2018 - 财政年份:2018
- 资助金额:
$ 2.33万 - 项目类别:
PromoScience
The role(s) played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2007 - 财政年份:2010
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
The role(s) played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2007 - 财政年份:2009
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
The role(s) played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2007 - 财政年份:2008
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
The role played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2001 - 财政年份:2006
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
The role played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2001 - 财政年份:2005
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
The role played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2001 - 财政年份:2004
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
The role played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2001 - 财政年份:2003
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
The role played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2001 - 财政年份:2002
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
The role played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2001 - 财政年份:2001
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
相似海外基金
The role(s) played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2007 - 财政年份:2011
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
The role(s) played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2007 - 财政年份:2010
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
The role(s) played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2007 - 财政年份:2009
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
The role(s) played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2007 - 财政年份:2008
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
The role played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2001 - 财政年份:2006
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
The role played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2001 - 财政年份:2005
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
The role played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2001 - 财政年份:2004
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
The role played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2001 - 财政年份:2003
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
The role played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2001 - 财政年份:2002
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual
The role played by plant hormones in the regulation of symbiotic structures
植物激素在共生结构调节中的作用
- 批准号:
183727-2001 - 财政年份:2001
- 资助金额:
$ 2.33万 - 项目类别:
Discovery Grants Program - Individual